Fonts messed up after waking up from hibernation (UXA bug)

[arky]

Binary package hint: xserver-xorg-video-intel

Fonts are skewed after the computer wakes up from hibernation mode

Screenshot:
http://playingwithsid.blogspot.com/2009/05/ubuntu-904-uxa-graphics-acceleration.html

ProblemType: Bug
Architecture: i386
Date: Mon May 25 12:23:28 2009
DistroRelease: Ubuntu 9.10
Package: xserver-xorg-video-intel 2:2.7.1-1ubuntu1
ProcEnviron:
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.30-5.6-generic
RelatedPackageVersions:
 xserver-xorg 1:7.4~5ubuntu20
 libgl1-mesa-glx 7.4.1-1ubuntu1
 libdrm2 2.4.9-2ubuntu1
 xserver-xorg-video-intel 2:2.7.1-1ubuntu1
 xserver-xorg-video-ati N/A
SourcePackage: xserver-xorg-video-intel
Uname: Linux 2.6.30-5-generic i686
system:
 distro: Ubuntu
 architecture: i686kernel: 2.6.30-5-generic

[Geir Ove Myhr (gomyhr)]

Thank you for taking the time to report this bug, especially for verifying it in the newest development version of ubuntu. For Xorg related bugs like this one, we need the files /var/log/Xorg.0.log and /etc/X11/xorg.conf and the output of `lspci -vvnn` as attachments to the bug report.

To figure out what changes when the system hibernates, we also need you to the the following procedure: (taken from http://intellinuxgraphics.org/how_to_report_bug.html and adopted to ubuntu)
0) Install the package xserver-xorg-video-intel-dbg to get the debugging tool intel_reg_dumper
1) VT switch to a text console (with Ctrl+Alt+F1)
2) Run `sudo intel_reg_dumper >i_r_d-before.txt` to get a register dump
3) Hibernate your machine with:
 a) `sudo -i` (to get a root shell)
 b) `echo disk > /sys/power/state`
4) On resume, before VT switching back to X:
 a) `exit` or Ctrl+D (to exit the root shell)
 b) Run `sudo intel_reg_dumper >i_r_d-after.txt` (to capture another register dump)
5) attach the files i_r_d-before.txt and i_r_d-after.txt to this bug report
(I tried to verify the procedure, but it turns out that my computer doesn't properly resume from hibernate)

[arky (arky)]

Thanks Geir, I would be posting the debugging information soon. The attached file contains Xorg logs , xorg.conf and the lspci output.

[Geir Ove Myhr (gomyhr)]

Thank you for the files. We prefer them as separate attachments, so
they are easy to inspect. Attaching them here.

[arky (arky)]

intel_reg_dumper output

[arky (arky)]

Couldn't reproduce the bug in the previous dumps. Here the output when the fonts are really skewed.

[Geir Ove Myhr (gomyhr)]

arky, as far as I understand it is the _pair_ of register dumps that
is important, so that one knows not only what the registers are on
resume, but also which ones are changed from right before the
hibernation. So could you try to get both before and after register
dumps for the same hibernation cycle and then verify that the bug is
reproduced when you switch terminal back to the X-session? (It is nice
to have the before-after pairs that you already uploaded for the case
when the bug didn't occur for comparison). For completeness, you may
also upload a screenshot that correspond to the register dump pair.

[arky (arky)]

Cool, I'll give it another shot.

[Mike.lifeguard (mikelifeguard)]

I'm getting this after suspend as well (I can't hibernate - I think due to some intel driver bug)

[arky (arky)]

Tests with 2.6.30-8-generic kernel didn't produce this issue. I hope the problem is fixed. Would continue to test for this bug with the newer 2.6.30-9.10 release.

[Bryce Harrington (bryce)]

Have you been able to confirm the issue is indeed gone with the newer kernel?

[arky (arky)]

Yes Bryce, the problem seems to be resolved in the new kernel ( 2.6.30-9-generic)

[Mike.lifeguard (mikelifeguard)]

Confirmed to be resolved here too (2.6.30-020630-generic)

[Geir Ove Myhr (gomyhr)]

Thank you for letting us know that this has been fixed. Closing this bug.