Common F17 bugs

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This page documents common bugs in Fedora 17 and, if available, fixes or workarounds for these problems.  If you find your problem in this page, ''do not file a bug for it, unless otherwise instructed.''  Where appropriate, a reference to the current bug(s) in Bugzilla is included.
 
This page documents common bugs in Fedora 17 and, if available, fixes or workarounds for these problems.  If you find your problem in this page, ''do not file a bug for it, unless otherwise instructed.''  Where appropriate, a reference to the current bug(s) in Bugzilla is included.
 
{{admon/note|Fedora 17 pre-release|Fedora 17 has not yet been released. During this pre-release period, this page will cover known issues in the Fedora 17 pre-releases. Issues that are fixed will be removed from the page once a fix is available (for instance, an issue that affects the Beta but is fixed in the final release will be removed at the time of that release).}}
 
  
 
== Release Notes ==
 
== Release Notes ==
Read the [[F17 Alpha release announcement]] and the [http://docs.fedoraproject.org/en-US/Fedora/17/html/Release_Notes/ Fedora 17 release notes] for specific information about changes in Fedora 17 and other general information.
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Read the [[F17 release announcement]] and the [http://fedorapeople.org/groups/docs/release-notes/en-US/ Fedora 17 Beta Release Notes] <!--[http://docs.fedoraproject.org/en-US/Fedora/17/html/Release_Notes/ Fedora 17 release notes]--> for specific information about changes in Fedora 17 and other general information.
  
 
== My bug is not listed ==
 
== My bug is not listed ==
 
 
Not every bug is listed in this page, but [http://bugzilla.redhat.com Bugzilla] should be a comprehensive database of known bugs.  This page is a sampling of the bugs most commonly discussed on our mailing lists and forums.
 
Not every bug is listed in this page, but [http://bugzilla.redhat.com Bugzilla] should be a comprehensive database of known bugs.  This page is a sampling of the bugs most commonly discussed on our mailing lists and forums.
  
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== Installation issues ==
 
== Installation issues ==
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{{Anchor|nfsiso-reboot-hang}}
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=== Post-install reboot fails after NFS installation ===
 +
<small>[[#nfsiso-reboot-hang|link to this item]] - [[rhbug:824191|Bugzilla: #824191]]</small>
  
{{Anchor|anaconda-explodey-redhatrelease}}
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Sometimes, after the completion of a Fedora 17 installation using an NFS repository, the reboot which ends the install process will fail, leaving the system stuck at a black screen or some kernel messages. It is quite safe to reboot manually at this point, the installation has completed successfully and the installed system will work correctly. We recognize that manual rebooting may be more difficult in the case of automated deployment of headless and/or remote systems. The issue occurs when the NFS repository in use is unmounted too quickly, while the installer is still attempting to use resources from it; it appears to be a race-prone issue, as it does not occur in every test, and seems to occur much more frequently on some test systems than in others.
=== Installation crashes if another Linux distribution or other Unix-style operating system is present ===
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<small>[[#anaconda-explodey-redhatrelease|link to this item]] - [[rhbug:791317|Bugzilla: #791317]]</small>
+
  
Due to a bug in the Fedora installer, installation will fail (and the installer will crash) if you attempt to install to a system which has another operating system installed, if that operating system contains a {{filename|/etc/fstab}} file but no {{filename|/etc/redhat-release}} file. The traceback will include the error ''TypeError: float() argument must be a string or a number'', and if you report the crash, it will be found to be a duplicate of [[rhbug:791317|Bugzilla: #791317]].
+
There is an [http://rvykydal.fedorapeople.org/updates.reboot.img installer updates image] which should work around the issue. For details on how to use an installer update image, see [https://fedoraproject.org/wiki/Anaconda/Updates this page]. Note that you will need to rename this file to ''updates.img'' for this to work.
  
As the bug is in the installer we cannot provide a regular update to resolve it, but there is an [http://bugzilla.redhat.com/attachment.cgi?id=565351 installer update image] you can use together with a Fedora 17 Alpha image. Full instructions on using an update image are available [[Anaconda/Updates|here]]: in short, pass the kernel parameter ''updates=http://bugzilla.redhat.com/attachment.cgi?id=565351'' to the installer.
+
You can also work around the issue by accessing the remote repository via HTTP or FTP rather than via NFS. HTTP/FTP repositories are not mounted, and so are not subject to the bug.
  
Alternatively, as a workaround, you can create a {{filename|/etc/redhat-release}} file for each operating system with a {{filename|/etc/fstab}}, of the general format the installer is looking for: ''Fedora release 17 (Beefy Miracle)''.
+
{{Anchor|upgrade-old-kernel}}
  
{{Anchor|btrfs-explodey}}
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=== Kernel from previous release may still be used after upgrade, prevents clean shutdown ===
=== Installation crashes if btrfs chosen as format for any target partition, or any btrfs-formatted partition is already present on a target disk ===
+
<small>[[#upgrade-old-kernel|link to this item]] - [[rhbug:820351|Bugzilla: #820351]]</small>
<small>[[#btrfs-explodey|link to this item]] - [[rhbug:787341|Bugzilla: #787341]]</small>
+
  
Due to a bug in the Fedora installer, if you choose btrfs as the format for any target partition as part of a Fedora 17 Alpha installation, or if any btrfs partition is present on a disk on the system to which you are attempting to install, the installer will crash with an error ''IndexError: list index out of range''.
+
Starting during the Fedora 17 development cycle, the Fedora kernel team has started keeping the kernel package on all currently-supported releases as closely synchronized as possible. One unfortunate consequence of this policy is that it is now much more likely than previously that, on upgrading from one Fedora release to the next, no kernel from the new release will be installed. This will very likely be the case if you use the Fedora 17 DVD to upgrade from an updated Fedora 16 installation without enabling the ''updates'' online repository during the upgrade.
  
At present, there is no known workaround for this issue.
+
Unfortunately, due to the [[Features/UsrMove|/usr move]] feature of Fedora 17, if you boot a Fedora 17 system using a kernel that was installed while the system was still running Fedora 16, it will be unable to shut down cleanly. You must use a kernel installed after the upgrade to Fedora 17 in order to shut down cleanly.
  
{{Anchor|pxe-plymouth-params}}
+
To avoid this problem we recommend enabling the ''updates'' repository when upgrading to Fedora 17 whenever possible. If you do an upgrade to Fedora 17 and find the system will not shut down cleanly, check with {{command|uname -r}} whether the kernel you are using is from a previous release. If so, try to install and use a Fedora 17 kernel from the online repositories.
=== PXE install can have problems with RAID arrays or encrypted devices ===
+
<small>[[#pxe-plymouth-params|link to this item]] - [[rhbug:787744|Bugzilla: #787744]]</small>
+
  
When installing Fedora 17 Alpha via PXE, some kernel parameters are not passed which are passed with other installation methods and, with previous releases, were automatically passed on PXE installations as well. These parameters prevent RAID arrays and encrypted partitions from being activated at initramfs initialization time, which interferes with their analysis and/or use by the installer.
+
{{Anchor|preupgrade-small-boot}}
 +
=== preupgrade fails with small /boot partition ===
 +
<small>[[#preupgrade-small-boot|link to this item]] - [[rhbug:813973|Bugzilla: #813973]]</small>
  
If you are performing a PXE install to a system with RAID devices or LUKS-encrypted partitions, you should add the following kernel parameters to ensure the installer does not encounter problems: ''rd.luks=0 rd.md=0 rd.dm=0''. If you do not, you may encounter an installer crash with an error ''RuntimeError: device is already mapped'', or similar problems.
+
If you attempt to preupgrade from an earlier Fedora release to Fedora 17 on a system with a small /boot partition - less than 500MB in size - the second phase of the upgrade (when the system reboots to the Fedora installer to complete the upgrade) will fail to boot properly, dropping you to an emergency shell after repeatedly failing to download a file.
  
{{Anchor|traditional-efi-usb}}
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You can work around this issue by editing the bootloader entry for the upgrade and removing ''/LiveOS/squashfs.img'' from the end of the stage2= parameter, so that it ends with ''/os/''. Doing so should allow the upgrade to proceed as normal.
=== DVD or network install image written to USB stick with livecd-iso-to-disk does not boot via UEFI ===
+
<small>[[#traditional-efi-usb|link to this item]] - [[rhbug:796419|Bugzilla: #796419]]</small>
+
  
If you write the Fedora 17 Alpha DVD or network install image to a USB drive using the {{command|livecd-iso-to-disk}} tool provided in the {{package|livecd-tools}} package (whatever version of Fedora you write the image from), using the --efi parameter which should result in a drive that can be booted via UEFI, it will not in fact succeed in booting the installer if booted via UEFI. After the bootloader menu is displayed, you will see a ''Error 15: File not found'' message.
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{{Anchor|mac-multi-EFI}}
 +
=== New EFI system partition created every time you install on a Mac ===
 +
<small>[[#mac-multi-EFI|link to this item]] - [[rhbug:821187|Bugzilla: #821187]]</small>
  
An updated [http://admin.fedoraproject.org/updates/FEDORA-2012-2313/livecd-tools-17.6-1.fc17 livecd-tools] package has been submitted to the updates-testing repository for testing. Users experiencing this problem are encouraged to test this update and [http://admin.fedoraproject.org/updates/FEDORA-2012-2313/livecd-tools-17.6-1.fc17 report] whether it solves the problem. To test the update, run this command:
+
Re-installing Fedora 17 on Macs in UEFI mode creates superfluous 200MB HFS+ partitions.
<pre>su -c 'yum --enablerepo=updates-testing update livecd-tools'</pre>
+
When re-installing Fedora 17 on Macs using UEFI boot, and choosing the "Replace Existing Linux" installation type, the previous 200MB HFS+ partition used as {{filename|/boot/efi}} will not be replaced. Instead a new one will be created. Both old and new boot options will appear in the option-key startup boot menu, and in Mac OS System Preferences > Startup Disk panel. It will not be clear which option is functional. To avoid this ambiguity, delete the 200MB HFS+ partition prior to re-installing Fedora 17, either from within the Anaconda user interface, or a CLI tool capable of editing a GPT. This does not affect first time installs.
  
The update is currently available only for Fedora 17, but if testing is successful it will be made available for Fedora 15 and Fedora 16. The drive will boot correctly to the installer if booted via BIOS or UEFI BIOS emulation, and if you specifically need to boot via UEFI, an image written via dd or a live image written via {{command|livecd-iso-to-disk --efi}} should work.
+
{{Anchor|ksdevice-case-sensitive}}
 +
=== ''ksdevice'' install parameter values are case-sensitive ===
 +
<small>[[#ksdevice-case-sensitive|link to this item]] - [[rhbug:820366|Bugzilla: #820366]]</small>
  
== Software issues ==
+
In Fedora 17, the values for the ''ksdevice='' parameter which can be passed to the installer are case sensitive. That is to say, ''ksdevice=bootif'' and ''ksdevice=link'' are valid, but ''ksdevice=BOOTIF'' or ''ksdevice=Link'' are not. Invalid values can cause the installer to fail to boot. This differs from previous releases, where the values were not case sensitive, so configurations which previously worked may no longer do so.
  
{{Anchor|pulseaudio-consolekit}}
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{{Anchor|preupgrade-grub}}
=== Sound does not work due to missing ConsoleKit ===
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=== preupgrade from Fedora 16 does not update bootloader configuration ===
<small>[[#pulseaudio-consolekit|link to this item]] - [[rhbug:794690|Bugzilla: #794690]]</small>
+
<small>[[#preupgrade-grub|link to this item]] - [[rhbug:815473|Bugzilla: #815473]]</small>
  
Sound will not work out of the box with Fedora 17 Alpha on all systems. This is due to PulseAudio's default configuration expecting ConsoleKit to be present, whereas it has in fact been removed from the default installation as part of the [[Features/ckremoval|ConsoleKit removal feature]]. We had planned to implement a quick fix for this as part of the Alpha release, but PulseAudio's assembler code does not compile with GCC 4.7, and fixing this is a substantial undertaking that could not be completed in time, so we could not perform a new build of PulseAudio.
+
Due to several issues with grub and with the way preupgrade attempts to update the bootloader configuration, when you preupgrade from Fedora 16 to Fedora 17, the first stage of the process - the preupgrade application which runs within Fedora 16 - fails to upgrade the bootloader configuration on completion. This means that, when you reboot in order to complete the upgrade via the Fedora 17 installer, the system will by default boot not to the installer to complete the update process, but back to the existing Fedora 16 installation.
  
Fortunately, working around the issue is simple. Just comment out, or entirely remove, the following lines from {{filename|/etc/pulse/default.pa}}:
+
There is no danger in this, and the upgrade can still be run successfully, no matter how many times the system is booted to Fedora 16. To complete the upgrade, you only have to access the boot menu before the timeout expires and manually select the 'Upgrade to Fedora 17' entry. This will cause the installer to run and complete the upgrade.
<pre>
+
.ifexists module-console-kit.so
+
load-module module-console-kit
+
.endif
+
</pre>
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Alternatively, you can install the {{package|ConsoleKit}} package, but ideally we would prefer if Alpha users run without ConsoleKit in order to help catch any other bugs caused by its removal.
+
  
{{Anchor|slooooooooooooooooow}}
+
{{Anchor|anaconda-btrfs-crash}}
=== Poor performance issues ===
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=== Installer crashes if you edit an existing btrfs partition ===
<small>[[#slooooooooooooooooow|link to this item]] - [[rhbug:735268|Bugzilla: #735268]] - [[rhbug:795050|Bugzilla: #795050]]</small>
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<small>[[#anaconda-btrfs-crash|link to this item]] - [[rhbug:810141|Bugzilla: #810141]]</small>
  
A bug was identified in the kernel included in Fedora 17 Alpha which seems to cause very poor performance on certain systems. Not all systems are affected, but on those that are, almost all operations seem to be affected.
+
If you use the 'custom partitioning' option in the Fedora 17 installer and attempt to edit an existing btrfs partition in any way, the installer will crash with the error "KeyError: 'fstypeCombo'". If you report the error it will show as a duplicate of [[rhbug:810141|bug #810141]].
  
An updated [http://admin.fedoraproject.org/updates/FEDORA-2012-2304/kernel-3.3.0-0.rc4.git1.4.fc17 kernel] package has been submitted to the updates-testing repository for testing. Users experiencing this problem are encouraged to test this update and [http://admin.fedoraproject.org/updates/FEDORA-2012-2304/kernel-3.3.0-0.rc4.git1.4.fc17 report] whether it solves the problem. To test the update, run this command:
+
There is no direct workaround for this bug. Fedora 17 is not capable of interactively creating or modifying btrfs partitions in the installer. If you wish to use btrfs partitions in a Fedora 17 installation, the options available are either to use a [[Anaconda/Kickstart|kickstart]] (scripted installation) or install Fedora 16 and then [[Upgrading|upgrade]].
<pre>su -c 'yum --enablerepo=updates-testing update kernel'</pre>
+
  
Please note also that, up until Beta, Fedora kernels are usually built with debugging options enabled. Some testers have noticed that debugging options appear to cause a higher performance overhead with more recent kernel versions (since approximately 2.6.39 or 3.0). You may notice a visible impact on performance with any Fedora kernel with debugging options enabled, but this is not really a bug. At Beta release time, we will switch to building kernels with debugging options disabled, and performance will improve.
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== Hardware issues ==
 +
{{Anchor|gtx580-Xorg-hang}}
 +
=== Systems hangs on X startup with NVIDIA GeForce GTX 580 adapter (affects installation) ===
 +
<small>[[#gtx580-Xorg-hang|link to this item]] - [[rhbug:802026|Bugzilla: #802026]]</small>
  
{{Anchor|shell-vm-crashy}}
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It has been reported that a bug in the nouveau video driver causes systems with an NVIDIA GeForce GTX 580 video adapter to hang as soon as the X graphical environment starts up. This issue also affects installation, so as soon as X is started, installation hangs.
=== GNOME Shell frequently crashes when used in a KVM virtual machine ===
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<small>[[#shell-vm-crashy|link to this item]] - [[rhbug:754568|Bugzilla: #754568]]</small>
+
  
If you install Fedora 17 Alpha with the default GNOME desktop in a virtual machine using Fedora's standard virtualization stack on a Fedora 16 or Fedora 17 host (i.e., a qemu/kvm-based virtual machine with Spice as the display protocol and using the qxl graphics driver in the guest, rather than VNC and cirrus), you will likely find that the GNOME Shell crashes frequently enough to make the desktop unusable. This is caused by bugs in the still-new [[Features/Gnome_shell_software_rendering|llvmpipe-based software rendering of GNOME Shell.]]
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This issue can be worked around by disabling hardware acceleration. To do this, pass the kernel parameter ''nouveau.noaccel=1''. You can append kernel parameters at boot time - of a live image, DVD or network install image, or an installed system - by hitting the Tab key when the system reaches the bootloader menu, and typing in the desired additional parameter.
  
Using the VNC/cirrus display combination is one possible workaround for this. Another is to continue using Spice/qxl, but switch to GNOME's fallback mode instead of using the software-accelerated Shell. It is possible to do this through the GNOME Control Center, but you will likely find Shell crashes before you can make it to the configuration toggle! It is therefore easier to toggle the fallback mode with the following shell command:
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You can make the workaround 'permanent' on an installed system either by editing it into the {{filename|/boot/grub2/grub.cfg}} file, or by creating a file named {{filename|/etc/modprobe.d/noaccel.conf}} containing a single line reading:
 
<pre>
 
<pre>
gsettings set org.gnome.desktop.session session-name 'gnome-fallback'
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options nouveau noaccel=1
 
</pre>
 
</pre>
run from your user account, not the root account.  You can do this from a GNOME terminal or from a virtual terminal. After running the command, log out and back in, and you should be in fallback mode rather than the Shell.
 
  
=== selinux deny_ptrace on by default ===
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== Software issues ==
The [[Features/SELinuxDenyPtrace|selinux deny_ptrace flag]] is default-enabled in beta, but will be cleared for final. This blocks debugger-type applications like gdb, strace, etc., that use the kernel ptrace(2) API.
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{{Anchor|hibernate-corruption}}
 +
=== Hibernation may lead to data corruption ===
 +
<small>[[#hibernate-corruption|link to this item]] - [[rhbug:823871|Bugzilla: #823871]] - [[rhbug:822071|Bugzilla: #822071]]</small>
 +
 
 +
There have been some reports that use of hibernation (suspend to disk, as opposed to suspend to RAM) may result in data corruption, possibly to files in {{filename|/var/tmp}}. After a hibernate/resume cycle, the partition is reported as damaged by fsck. These reports are still being investigated, but as a precaution we highly recommend you avoid use of the hibernation function on systems containing important data. Sleep - suspend to RAM - is usually sufficient for most purposes.
 +
 
 +
{{Anchor|gdm-layout}}
 +
=== GNOME login screen (GDM) always uses US keyboard layout if available ===
 +
<small>[[#gdm-layout|link to this item]] - [[rhbug:816554|Bugzilla: #816554]]</small>
 +
 
 +
In Fedora 17, GDM (the GNOME login manager) is designed to always use the U.S. keyboard layout if it is available. This design is now considered to be flawed, but there was not time to change it for the release of Fedora 17. This means that if you install Fedora 17 using any of the keyboard layouts that are, by default, 'twinned' with the U.S. English layout - including Czech QWERTZ, Russian, several Indian layouts, and several others, all listed in [https://bugzilla.redhat.com/show_bug.cgi?id=816554#c7 this Bugzilla comment], then the chosen layout will be used during user creation in the firstboot utility, but the U.S. English layout will be selected by default in GDM. This is, obviously, confusing, and may lead to your 'correctly typed' password not being accepted, if the keys used to enter it differ between the two layouts. You can change the keyboard layout in GDM simply by clicking on the layout selector at the top-right hand corner of the screen.
 +
 
 +
Of course, you will also be affected by this issue if you typically use a layout other than U.S. English which does not come 'twinned' with the U.S. English layout by default, but you manually install the U.S. English layout after system installation.
 +
 
 +
{{Anchor|dkms-old-fail}}
 +
=== DKMS broken due to executable being named dkms.old instead of dkms ===
 +
<small>[[#dkms-old-fail|link to this item]] - [[rhbug:790521|Bugzilla: #790521]]</small>
 +
 
 +
The {{package|dkms}} package contains a very old post-install scriptlet which checks for {{filename|/sbin/dkms}} and renames it to {{filename|/sbin/dkms.old}}. This appears to have been intended to prevent an old copy of dkms in /sbin from overriding the Fedora-provided copy in /usr/sbin. However, with the [[Features/UsrMove|/usr move]] feature in Fedora 17, {{filename|/sbin}} is a symlink to {{filename|/usr/sbin}}, and consequently the Fedora package itself effectively provides a copy of {{filename|/sbin/dkms}} - which its own script promptly renames. The upshot is that there is no 'dkms' executable after installation of Fedora 17's {{package|dkms}} package, and so DKMS fails to work at all.
 +
 
 +
To work around this issue, manually rename {{filename|/usr/sbin/dkms.old}} to {{filename|/usr/sbin/dkms}}. You may have to do this after each update of the {{package|dkms}} package, at least until this bug is fixed.
 +
 
 +
We hope to issue an update to resolve this bug shortly.
 +
<!--
 +
{{Anchor|packagekit-yum-lock}}
 +
=== PackageKit sometimes locks yum too frequently and for too long ===
 +
<small>[[#packagekit-yum-lock|link to this item]] - [[rhbug:810530|Bugzilla: #810530]]</small>
 +
 
 +
Some testers have reported that, in Fedora 17 Beta, PackageKit background operations seems to hold the yum lock (preventing any manual use of yum or PackageKit) much more frequently, and for longer periods of time, than was the case in previous releases. There is currently no clear indication of why this is, or any known workaround; we are at the early stages of investigating the problem. It is noted here purely for information.
 +
-->
 +
{{Anchor|deny-ptrace}}
 +
=== SELinux deny_ptrace flag on by default: will prevent gdb etc. from working ===
 +
<small>[[#deny-ptrace|link to this item]]</small>
 +
 
 +
The [[Features/SELinuxDenyPtrace|SELinux deny_ptrace flag]] is enabled in Fedora 17. This will prevent applications that use the kernel ptrace(2) API - like gdb and strace, and other debugging utilities - from working: you will see an SELinux denial when trying to use them. To toggle the flag off (until reboot), so you can use a debugger, run {{command|setsebool deny_ptrace 0}} as root. To make this change permanent even after rebooting, run {{command|setsebool -P deny_ptrace 0}}.
 +
 
 +
{{Anchor|pam-config-upgrade}}
 +
 
 +
=== Soundcard inaccessible after upgrade from a previous Fedora release ===
 +
<small>[[#pam-config-upgrade|link to this item]] - [[rhbug:815413|Bugzilla: #815413]]</small>
 +
 
 +
A few users reported that after upgrading from Fedora 16 their /etc/pam.d/* configuration files did not reference the pam_systemd.so module. As a result, the user login sessions are not properly tracked by the systemd-logind daemon and the users are not granted access to sound and other devices. It is unclear what the exact conditions for the wrong PAM configuration to occur are. The problem does not seem to be easily reproduced. To fix the problem, run <code>authconfig --updateall</code> which will correct the PAM configuration files.
 +
 
 +
{{Anchor|chronyd-hotel-california}}
 +
=== Disabling '''chronyd''' service does not stop chronyd from running ===
 +
<small>[[#chronyd-hotel-california|link to this item]] - [[rhbug:821813|Bugzilla: #821813]]</small>
 +
 
 +
Due to the design used to allow the GNOME control center to enable or disable network time configuration, disabling the ''chronyd.service'' service will not in fact prevent chronyd from running if at least one of these conditions is true:
 +
* Network time is enabled in the GNOME control center.
 +
* ''ntpd.service'' is installed as well and enabled.
 +
 
 +
If you wish to prevent chronyd from starting, you can do <code>systemctl mask chronyd.service</code>. Or, you can remove the {{package|chrony}} package.
 +
 
 +
{{Anchor|virt-gdm-fprint}}
 +
=== GDM fails to run in some virtual machine configurations with fprintd installed ===
 +
<small>[[#virt-gdm-fprint|link to this item]] - [[rhbug:810040|Bugzilla: #810040]]</small>
 +
 
 +
Several users have reported that Fedora 17 installations to various virtual machine configurations, including Xen, VMware, and KVM systems, fail to run the default login manager (GDM). The ''Oh no! An error has occurred'' error screen appears instead. The GDM logs, if examined, show ''<nowiki>JS ERROR: !!!  Exception was: Error: Error invoking Gio.init: Error calling
 +
StartServiceByName for net.reactivated.Fprint: GDBus.Error:org.freedesktop.DBus
 +
.Error.Spawn.ChildExited: Launch helper exited with unknown return code 157</nowiki>''.
 +
 
 +
This issue can be worked around by removing the {{package|fprintd}} and {{package|fprintd-pam}} packages (from a virtual terminal if necessary). After doing this, GDM should run and work correctly.

Revision as of 05:14, 18 September 2012

This page documents common bugs in Fedora 17 and, if available, fixes or workarounds for these problems. If you find your problem in this page, do not file a bug for it, unless otherwise instructed. Where appropriate, a reference to the current bug(s) in Bugzilla is included.

Contents

Release Notes

Read the F17 release announcement and the Fedora 17 Beta Release Notes for specific information about changes in Fedora 17 and other general information.

My bug is not listed

Not every bug is listed in this page, but Bugzilla should be a comprehensive database of known bugs. This page is a sampling of the bugs most commonly discussed on our mailing lists and forums.

To see if your bug has already been reported, you can search Bugzilla. If it has not yet been reported, we encourage you to do so to help improve Fedora for yourself and others. A guide to Bugs and feature requests has been prepared to assist you.

If you believe an already-reported bug report should be added to this page because it is commonly encountered, you can:

  • Add it yourself, if you have wiki access. Please follow the style and guidelines explained in the comments in the page source.
  • Or, add the CommonBugs keyword to the bug report. Someone from the QA team will then inspect the issue to determine whether the bug should be listed as a common bug. To expedite your request, please add a comment to the bug that includes
    1. a summary of the problem
    2. any known workarounds
    3. an assessment on the impact to Fedora users

For reference, you can query Bugzilla for bugs tagged CommonBugs:

  • CommonBugs? (bugs with CommonBugs keyword, but do not yet have a link to this page)
  • CommonBugs+(bugs with CommonBugs keyword and contain a link to this page)


Installation issues

Post-install reboot fails after NFS installation

link to this item - Bugzilla: #824191

Sometimes, after the completion of a Fedora 17 installation using an NFS repository, the reboot which ends the install process will fail, leaving the system stuck at a black screen or some kernel messages. It is quite safe to reboot manually at this point, the installation has completed successfully and the installed system will work correctly. We recognize that manual rebooting may be more difficult in the case of automated deployment of headless and/or remote systems. The issue occurs when the NFS repository in use is unmounted too quickly, while the installer is still attempting to use resources from it; it appears to be a race-prone issue, as it does not occur in every test, and seems to occur much more frequently on some test systems than in others.

There is an installer updates image which should work around the issue. For details on how to use an installer update image, see this page. Note that you will need to rename this file to updates.img for this to work.

You can also work around the issue by accessing the remote repository via HTTP or FTP rather than via NFS. HTTP/FTP repositories are not mounted, and so are not subject to the bug.

Kernel from previous release may still be used after upgrade, prevents clean shutdown

link to this item - Bugzilla: #820351

Starting during the Fedora 17 development cycle, the Fedora kernel team has started keeping the kernel package on all currently-supported releases as closely synchronized as possible. One unfortunate consequence of this policy is that it is now much more likely than previously that, on upgrading from one Fedora release to the next, no kernel from the new release will be installed. This will very likely be the case if you use the Fedora 17 DVD to upgrade from an updated Fedora 16 installation without enabling the updates online repository during the upgrade.

Unfortunately, due to the /usr move feature of Fedora 17, if you boot a Fedora 17 system using a kernel that was installed while the system was still running Fedora 16, it will be unable to shut down cleanly. You must use a kernel installed after the upgrade to Fedora 17 in order to shut down cleanly.

To avoid this problem we recommend enabling the updates repository when upgrading to Fedora 17 whenever possible. If you do an upgrade to Fedora 17 and find the system will not shut down cleanly, check with uname -r whether the kernel you are using is from a previous release. If so, try to install and use a Fedora 17 kernel from the online repositories.

preupgrade fails with small /boot partition

link to this item - Bugzilla: #813973

If you attempt to preupgrade from an earlier Fedora release to Fedora 17 on a system with a small /boot partition - less than 500MB in size - the second phase of the upgrade (when the system reboots to the Fedora installer to complete the upgrade) will fail to boot properly, dropping you to an emergency shell after repeatedly failing to download a file.

You can work around this issue by editing the bootloader entry for the upgrade and removing /LiveOS/squashfs.img from the end of the stage2= parameter, so that it ends with /os/. Doing so should allow the upgrade to proceed as normal.

New EFI system partition created every time you install on a Mac

link to this item - Bugzilla: #821187

Re-installing Fedora 17 on Macs in UEFI mode creates superfluous 200MB HFS+ partitions. When re-installing Fedora 17 on Macs using UEFI boot, and choosing the "Replace Existing Linux" installation type, the previous 200MB HFS+ partition used as /boot/efi will not be replaced. Instead a new one will be created. Both old and new boot options will appear in the option-key startup boot menu, and in Mac OS System Preferences > Startup Disk panel. It will not be clear which option is functional. To avoid this ambiguity, delete the 200MB HFS+ partition prior to re-installing Fedora 17, either from within the Anaconda user interface, or a CLI tool capable of editing a GPT. This does not affect first time installs.

ksdevice install parameter values are case-sensitive

link to this item - Bugzilla: #820366

In Fedora 17, the values for the ksdevice= parameter which can be passed to the installer are case sensitive. That is to say, ksdevice=bootif and ksdevice=link are valid, but ksdevice=BOOTIF or ksdevice=Link are not. Invalid values can cause the installer to fail to boot. This differs from previous releases, where the values were not case sensitive, so configurations which previously worked may no longer do so.

preupgrade from Fedora 16 does not update bootloader configuration

link to this item - Bugzilla: #815473

Due to several issues with grub and with the way preupgrade attempts to update the bootloader configuration, when you preupgrade from Fedora 16 to Fedora 17, the first stage of the process - the preupgrade application which runs within Fedora 16 - fails to upgrade the bootloader configuration on completion. This means that, when you reboot in order to complete the upgrade via the Fedora 17 installer, the system will by default boot not to the installer to complete the update process, but back to the existing Fedora 16 installation.

There is no danger in this, and the upgrade can still be run successfully, no matter how many times the system is booted to Fedora 16. To complete the upgrade, you only have to access the boot menu before the timeout expires and manually select the 'Upgrade to Fedora 17' entry. This will cause the installer to run and complete the upgrade.

Installer crashes if you edit an existing btrfs partition

link to this item - Bugzilla: #810141

If you use the 'custom partitioning' option in the Fedora 17 installer and attempt to edit an existing btrfs partition in any way, the installer will crash with the error "KeyError: 'fstypeCombo'". If you report the error it will show as a duplicate of bug #810141.

There is no direct workaround for this bug. Fedora 17 is not capable of interactively creating or modifying btrfs partitions in the installer. If you wish to use btrfs partitions in a Fedora 17 installation, the options available are either to use a kickstart (scripted installation) or install Fedora 16 and then upgrade.

Hardware issues

Systems hangs on X startup with NVIDIA GeForce GTX 580 adapter (affects installation)

link to this item - Bugzilla: #802026

It has been reported that a bug in the nouveau video driver causes systems with an NVIDIA GeForce GTX 580 video adapter to hang as soon as the X graphical environment starts up. This issue also affects installation, so as soon as X is started, installation hangs.

This issue can be worked around by disabling hardware acceleration. To do this, pass the kernel parameter nouveau.noaccel=1. You can append kernel parameters at boot time - of a live image, DVD or network install image, or an installed system - by hitting the Tab key when the system reaches the bootloader menu, and typing in the desired additional parameter.

You can make the workaround 'permanent' on an installed system either by editing it into the /boot/grub2/grub.cfg file, or by creating a file named /etc/modprobe.d/noaccel.conf containing a single line reading:

options nouveau noaccel=1

Software issues

Hibernation may lead to data corruption

link to this item - Bugzilla: #823871 - Bugzilla: #822071

There have been some reports that use of hibernation (suspend to disk, as opposed to suspend to RAM) may result in data corruption, possibly to files in /var/tmp. After a hibernate/resume cycle, the partition is reported as damaged by fsck. These reports are still being investigated, but as a precaution we highly recommend you avoid use of the hibernation function on systems containing important data. Sleep - suspend to RAM - is usually sufficient for most purposes.

GNOME login screen (GDM) always uses US keyboard layout if available

link to this item - Bugzilla: #816554

In Fedora 17, GDM (the GNOME login manager) is designed to always use the U.S. keyboard layout if it is available. This design is now considered to be flawed, but there was not time to change it for the release of Fedora 17. This means that if you install Fedora 17 using any of the keyboard layouts that are, by default, 'twinned' with the U.S. English layout - including Czech QWERTZ, Russian, several Indian layouts, and several others, all listed in this Bugzilla comment, then the chosen layout will be used during user creation in the firstboot utility, but the U.S. English layout will be selected by default in GDM. This is, obviously, confusing, and may lead to your 'correctly typed' password not being accepted, if the keys used to enter it differ between the two layouts. You can change the keyboard layout in GDM simply by clicking on the layout selector at the top-right hand corner of the screen.

Of course, you will also be affected by this issue if you typically use a layout other than U.S. English which does not come 'twinned' with the U.S. English layout by default, but you manually install the U.S. English layout after system installation.

DKMS broken due to executable being named dkms.old instead of dkms

link to this item - Bugzilla: #790521

The Package-x-generic-16.pngdkms package contains a very old post-install scriptlet which checks for /sbin/dkms and renames it to /sbin/dkms.old. This appears to have been intended to prevent an old copy of dkms in /sbin from overriding the Fedora-provided copy in /usr/sbin. However, with the /usr move feature in Fedora 17, /sbin is a symlink to /usr/sbin, and consequently the Fedora package itself effectively provides a copy of /sbin/dkms - which its own script promptly renames. The upshot is that there is no 'dkms' executable after installation of Fedora 17's Package-x-generic-16.pngdkms package, and so DKMS fails to work at all.

To work around this issue, manually rename /usr/sbin/dkms.old to /usr/sbin/dkms. You may have to do this after each update of the Package-x-generic-16.pngdkms package, at least until this bug is fixed.

We hope to issue an update to resolve this bug shortly.

SELinux deny_ptrace flag on by default: will prevent gdb etc. from working

link to this item

The SELinux deny_ptrace flag is enabled in Fedora 17. This will prevent applications that use the kernel ptrace(2) API - like gdb and strace, and other debugging utilities - from working: you will see an SELinux denial when trying to use them. To toggle the flag off (until reboot), so you can use a debugger, run setsebool deny_ptrace 0 as root. To make this change permanent even after rebooting, run setsebool -P deny_ptrace 0.

Soundcard inaccessible after upgrade from a previous Fedora release

link to this item - Bugzilla: #815413

A few users reported that after upgrading from Fedora 16 their /etc/pam.d/* configuration files did not reference the pam_systemd.so module. As a result, the user login sessions are not properly tracked by the systemd-logind daemon and the users are not granted access to sound and other devices. It is unclear what the exact conditions for the wrong PAM configuration to occur are. The problem does not seem to be easily reproduced. To fix the problem, run authconfig --updateall which will correct the PAM configuration files.

Disabling chronyd service does not stop chronyd from running

link to this item - Bugzilla: #821813

Due to the design used to allow the GNOME control center to enable or disable network time configuration, disabling the chronyd.service service will not in fact prevent chronyd from running if at least one of these conditions is true:

  • Network time is enabled in the GNOME control center.
  • ntpd.service is installed as well and enabled.

If you wish to prevent chronyd from starting, you can do systemctl mask chronyd.service. Or, you can remove the Package-x-generic-16.pngchrony package.

GDM fails to run in some virtual machine configurations with fprintd installed

link to this item - Bugzilla: #810040

Several users have reported that Fedora 17 installations to various virtual machine configurations, including Xen, VMware, and KVM systems, fail to run the default login manager (GDM). The Oh no! An error has occurred error screen appears instead. The GDM logs, if examined, show JS ERROR: !!! Exception was: Error: Error invoking Gio.init: Error calling StartServiceByName for net.reactivated.Fprint: GDBus.Error:org.freedesktop.DBus .Error.Spawn.ChildExited: Launch helper exited with unknown return code 157.

This issue can be worked around by removing the Package-x-generic-16.pngfprintd and Package-x-generic-16.pngfprintd-pam packages (from a virtual terminal if necessary). After doing this, GDM should run and work correctly.