Common F17 bugs
(→Poor performance issues)
(add 794690 (sound broken due to pa/consolekit mess))
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== Software issues ==
== Software issues ==
Revision as of 05:52, 28 February 2012
This page documents common bugs in Fedora 16 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.
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
- a summary of the problem
- any known workarounds
- 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)
DVD or network install image written to USB stick with livecd-iso-to-disk does not boot via UEFI
If you write the Fedora 17 Alpha DVD or network install image to a USB drive using the
livecd-iso-to-disk tool provided in the
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.
An updated livecd-tools package has been submitted to the updates-testing repository for testing. Users experiencing this problem are encouraged to test this update and report whether it solves the problem. To test the update, run this command:
su -c 'yum --enablerepo=updates-testing update livecd-tools'
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
livecd-iso-to-disk --efi should work.
Sound does not work due to missing ConsoleKit
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 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.
Fortunately, working around the issue is simple. Just comment out, or entirely remove, the following lines from
.ifexists module-console-kit.so load-module module-console-kit .endif
Poor performance issues
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.
An updated kernel package has been submitted to the updates-testing repository for testing. Users experiencing this problem are encouraged to test this update and report whether it solves the problem. To test the update, run this command:
su -c 'yum --enablerepo=updates-testing update kernel'
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.