Bug 986074 - Ongoing graphical corruption in GNOME when booting debug kernels in current Rawhide
Summary: Ongoing graphical corruption in GNOME when booting debug kernels in current R...
Keywords:
Status: CLOSED EOL
Alias: None
Product: Fedora
Classification: Fedora
Component: xorg-x11-drv-nouveau
Version: 20
Hardware: All
OS: All
unspecified
high
Target Milestone: ---
Assignee: Ben Skeggs
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2013-07-18 22:09 UTC by Adam Williamson
Modified: 2015-06-29 12:06 UTC (History)
8 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2015-06-29 12:06:22 UTC
Type: Bug
Embargoed:


Attachments (Terms of Use)

Description Adam Williamson 2013-07-18 22:09:20 UTC
If I boot kernel-3.11.0-0.rc0.git7.1.fc20.x86_64 or kernel-3.11.0-0.rc1.git1.1.fc20.x86_64 - both of which have debugging symbols enabled (and I boot with slub_debug=-) - throughout my GNOME session I see constant artifacting, describable more or less as bits of the display 'disappearing' (I can see what's behind them, or the desktop) and then showing up again a few seconds later.

If I boot kernel-3.11.0-0.rc1.git0.1.fc20.x86_64 - which has debugging symbols disabled - I do not see this artifacting at all.

I don't see anything in journalctl that looks related, at a glance. My video adapter is a 01:00.0 VGA compatible controller [0300]: NVIDIA Corporation G94 [GeForce 9600 GT] [10de:0622] (rev a1) , using nouveau.

I'll attach a video showing the issue.

Comment 1 Adam Williamson 2013-07-18 22:10:31 UTC
Interestingly, the artifacting stops happening if I turn on the Shell screen recorder - not just that it doesn't show up in the video (which I was half expecting), but it actually _stops happening_.

I'll try and get a video from my camera.

Comment 2 Adam Williamson 2013-07-18 22:30:45 UTC
http://www.happyassassin.net/extras/debug_artifact.mp4 is a video from my camera showing some of the artifacting. Note I have two monitors, the video only shows the right hand one - the panel's on the other, if you're wondering where it is. I'm just typing in xchat and alt-tabbing to Firefox, you can see various artifacts going on.

Comment 3 Adam Williamson 2013-08-19 17:10:16 UTC
With 3.11.0-0.rc5.git6.1.fc20.x86_64 the exact corruption described in the OP is not visible any more, but windows tend to flash when I'm switching between them, opening a new one or going to the overview. Still doesn't happen with non-debug kernels.

Comment 4 Adam Williamson 2013-08-22 22:01:18 UTC
Reported upstream: https://bugs.freedesktop.org/show_bug.cgi?id=68453

Comment 5 Fedora End Of Life 2013-09-16 14:38:18 UTC
This bug appears to have been reported against 'rawhide' during the Fedora 20 development cycle.
Changing version to '20'.

More information and reason for this action is here:
https://fedoraproject.org/wiki/BugZappers/HouseKeeping/Fedora20

Comment 6 Fedora End Of Life 2015-05-29 09:11:54 UTC
This message is a reminder that Fedora 20 is nearing its end of life.
Approximately 4 (four) weeks from now Fedora will stop maintaining
and issuing updates for Fedora 20. It is Fedora's policy to close all
bug reports from releases that are no longer maintained. At that time
this bug will be closed as EOL if it remains open with a Fedora  'version'
of '20'.

Package Maintainer: If you wish for this bug to remain open because you
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Comment 7 Fedora End Of Life 2015-06-29 12:06:22 UTC
Fedora 20 changed to end-of-life (EOL) status on 2015-06-23. Fedora 20 is
no longer maintained, which means that it will not receive any further
security or bug fix updates. As a result we are closing this bug.

If you can reproduce this bug against a currently maintained version of
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