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Revision as of 23:59, 24 September 2018 by Adamwill (talk | contribs) (add 1616167 (DNF problems with modular packages when module repos are disabled))

This page documents common bugs in Fedora 29 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.

Pre-release version
Fedora 29 has not yet been released. During this pre-release period, this page will cover known issues in the Fedora 29 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

Read the F29_Beta_release_announcement for specific information about changes in Fedora 29 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. Common bugs instructions provides guidance on how to add an entry to the page correctly, but the most important thing is to make sure that the bug is listed - don't worry if you don't get the format quite right, we can clean it up later.
  • 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

UEFI install in 'basic graphics mode' may fail to boot

link to this item - Bugzilla: #1628495

Several testers have reported that attempting to boot Fedora 29 installer images in native UEFI mode and using the Install Fedora 29 in basic graphics mode option from the Troubleshooting menu may fail to reach the graphical installer successfully.

So far, this bug has not been reported to affect any system which does not boot successfully using the regular boot option, so we suggest simply doing that instead. If you have a system which fails to boot either in "normal" or "basic" graphics mode, please report this to the bug.

Upgrade issues

GNOME Software in Fedora 27 does not offer upgrade to Fedora 29 even after enabling unstable release upgrades

link to this item - Bugzilla: #1628497

Testing has shown that Fedora 27's GNOME Software will not offer an upgrade directly to Fedora 29, even if you enable the gsettings show-upgrade-prerelease key that should allow this to happen.

If you are simply trying to upgrade to Fedora 29 and don't really mind how it happens, you have two obvious choices. You can simply upgrade to Fedora 28 and then from 28 to 29 via GNOME Software, or you can do the upgrade in one go using dnf instead of GNOME Software, following the DNF_system_upgrade instructions.

If you are specifically attempting to test GNOME Software upgrade from 27 to 29, you should be able to force the option to appear by doing the following. Exit GNOME Software, then edit the file ~/.cache/gnome-software/fedora-pkgdb-collections/fedora.json. Remove the entire dict for Fedora 28, and/or set Fedora 29's status to Active instead of Under Development. Run GNOME Software again, and it should offer you the upgrade to Fedora 29 instead of 28. You may have to attempt this a few times, as GNOME Software will sometimes re-download the file in question and hence restore it to its original state.

Core system issues

Package management tools (dnf, GNOME Software etc.) can crash when more than one runs at once

link to this item - Bugzilla: #1631533

The version of libdnf included in Fedora 29 introduces a database called 'swdb' which is intended to replace old, tool-specific databases like the yum/DNF history database, with the intention that all package management tools will share a common view of the transaction history and so on. However, it seems that multiple processes attempting to access this database simultaneously may not queue in an orderly fashion, or exit cleanly, but crash with an error message like Exec failed: database is locked. So far, this issue has been reproduced with one dnf process and one pkcon process, and also with two dnf processes.

To the best of our current knowledge, this problem cannot result in partially-completed transactions or inconsistent databases, as the process that crashes should not have actually made any changes to anything yet. However, as any crash in a package manager is undesirable and worrying, we are working to resolve this as soon as possible.

To "work around" it for now, simply retry the transaction that failed. Once the other transaction has completed, it should succeed. If the other process is one you ran yourself, it should be easy to identify, but it may be harder if it is an automatically-scheduled update or something along those lines.

Printing via CUPS filters does not work

link to this item - Bugzilla: #1628255

Update available for testing
A candidate fix for this issue has been submitted to the updates-testing repository for testing. Users experiencing this problem are encouraged to test this update and report to Bodhi whether it solves the problem. To test the update, run this command: sudo dnf --enablerepo=updates-testing update --advisory=FEDORA-2018-26b38a126f

A change in glibc is reported to cause any attempt to print which must go through a CUPS filter running on Fedora 29 to fail. There are various affected scenarios, which are discussed in more detail in the bug report.

Installing the update (see above) is likely easier than any method for 'working around' this problem.

Cron jobs in /etc/cron.d (including cron.hourly) do not run

link to this item - Bugzilla: #1625645

Testing has shown that cron jobs in correct formats dropped into /etc/cron.d do not get run. This includes all scripts dropped into /etc/cron.hourly, as execution of those depends on a job in /etc/cron.d. This problem is due to SELinux blocking the operation.

To work around this problem until it is resolved, a comment on the bug report contains a suggested CIL-formatted policy that allows these jobs to run:

(allow unconfined_t system_cron_spool_t( file ( entrypoint)))

to use this, save that single line to a file with the extension .cil, e.g. crond.cil, and load it with semodule, e.g. sudo semodule -i crond.cil. After you do this, the jobs should execute successfully.

DNF operations performed with modular repositories offline are not aware of modules

link to this item - Bugzilla: #1616167

If you have any modules enabled on your Fedora 29 system, and you somehow perform a package management operation with the modular repositories disabled, any packages installed from the modules will be treated as if they were non-modular packages.

For instance, say you have a module enabled that provides version 2.0 of package foo, but the non-modular Fedora 29 repositories contain version 3.0 of the same package. Normally, when you run DNF, it will recognize that you are using the module, and not offer to upgrade to foo 3.0 from the non-modular repositories. If, however, you somehow run an update operation with the modular repositories disabled, DNF will incorrectly offer this update.

It is not likely that you will run into this scenario in normal use of Fedora 29 Beta, but we do recommend you be careful with the use of the --disablerepo argument to DNF. It is also at least possible that you may hit it by temporarily enabling the updates-testing-modular repository to enable a new repository; until the module is present in the updates-modular repository, subsequent operations without the updates-testing-modular repository enabled may run into this issue, so, again, take care.

We are aiming to resolve at least the worst possible cases and consequences of this before Fedora 29 proper is released.

Workstation (GNOME) Issues

GNOME may crash on switch back from virtual terminal under with multiple displays

link to this item - Bugzilla: #1630367

Some testers have reported that GNOME may crash on a system with multiple displays, running GNOME under (rather than Wayland), if the user switches to a VT (console) and then switches back again. So far this bug has been reported to affect Lenovo Thinkpad T460s, T470s and T480s laptops, and a desktop with a Radeon R7-based graphics card, with various display configurations.

If you are affected by a problem like this, the most obvious workaround is to run on Wayland instead of, if you can. If you must use, we can only advise that you avoid using virtual terminals until this can be investigated and resolved.