[i915] Xorg freeze

[Danilo Piazzalunga]

Xorg server freezes randomly after an upgrade to Natty.

I suspect this to be a duplicate of bug #740126. Most symptoms match:

 * Happens when the screensaver (blank screen) is active
 * The mouse cursor changes when moving it on different part of the screen, as if applications get events anyway (see comment #53 on bug #740126)

It looks like it only happens after a suspend/resume, but I can not confirm this yet.

I was able to switch to a console and gather some information, using intel_gpu_dump and apport-bug $(pidof X).

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: xserver-xorg-core 2:1.10.1-1ubuntu1.1
ProcVersionSignature: Ubuntu 2.6.38-10.44-generic-pae 2.6.38.7
Uname: Linux 2.6.38-10-generic-pae i686
Architecture: i386
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
Date: Wed Jun 22 16:38:35 2011
DistUpgraded: Log time: 2011-06-19 17:06:20.992440
DistroCodename: natty
DistroVariant: ubuntu
DkmsStatus: virtualbox-ose, 4.0.4, 2.6.38-10-generic-pae, i686: installed
ExecutablePath: /usr/bin/Xorg
GraphicsCard:
 Intel Corporation Core Processor Integrated Graphics Controller [8086:0046] (rev 02) (prog-if 00 [VGA controller])
   Subsystem: Sony Corporation Device [104d:9071]
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release i386 (20100429)
MachineType: Sony Corporation VPCEB1J8E
ProcEnviron:
 LANG=it_IT.UTF-8
 PATH=(custom, no user)
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-10-generic-pae root=UUID=d3ce4e6b-33ce-467b-970e-31d962a99ac4 ro crashkernel=384M-2G:64M,2G-:128M quiet splash vt.handoff=7
ProcKernelCmdLine_: BOOT_IMAGE=/boot/vmlinuz-2.6.38-10-generic-pae root=UUID=d3ce4e6b-33ce-467b-970e-31d962a99ac4 ro crashkernel=384M-2G:64M,2G-:128M quiet splash vt.handoff=7
Renderer: Unknown
SourcePackage: xorg-server
UpgradeStatus: Upgraded to natty on 2011-06-19 (2 days ago)
dmi.bios.date: 07/20/2010
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: R0300Y8
dmi.board.asset.tag: N/A
dmi.board.name: VAIO
dmi.board.vendor: Sony Corporation
dmi.board.version: N/A
dmi.chassis.asset.tag: N/A
dmi.chassis.type: 10
dmi.chassis.vendor: Sony Corporation
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrR0300Y8:bd07/20/2010:svnSonyCorporation:pnVPCEB1J8E:pvrC604THHU:rvnSonyCorporation:rnVAIO:rvrN/A:cvnSonyCorporation:ct10:cvrN/A:
dmi.product.name: VPCEB1J8E
dmi.product.version: C604THHU
dmi.sys.vendor: Sony Corporation
version.compiz: compiz 1:0.9.4+bzr20110606-0ubuntu1~natty1
version.libdrm2: libdrm2 2.4.23-1ubuntu6
version.libgl1-mesa-dri: libgl1-mesa-dri 7.10.2-0ubuntu2
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 7.10.2-0ubuntu2
version.xserver-xorg: xserver-xorg 1:7.6+4ubuntu3.1
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.0-0ubuntu4
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.14.0-4ubuntu7.1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110107+b795ca6e-0ubuntu7

[Danilo Piazzalunga (danilopiazza)]

As suggested in bug #740126, I collected information from i915_error_state and gdb. I am reporting it, although I don't see anything useful.

$ sudo cat /sys/kernel/debug/dri/0/i915_error_state
no error state collected

$ sudo gdb Xorg $(pgrep X)

(gdb) print grabState
$1 = 0
(gdb) thread apply all bt full
[... backtrace is attached ...]

[Bryce Harrington (bryce)]

Hey danilopiazza,

You filed this bug report against natty, but I see it's still open and
doesn't appear to have much activity recently. So, now that oneiric
is released and stable, this may be a good point for you to upgrade
and re-test if this issue is still present there.

If it's solved in the new release and you think it's worth backporting
the fix, please indicate that. Or if having the fix in the new release
is good enough, feel free to close out the bug (or let us know and we'll
close it.)

If it's not solved, leave the bug report open. I can't promise we'll
get to it (we get way more bugs filed than we can usually get to), but
your testing and feedback can help out if and when we do.

[Danilo Piazzalunga (danilopiazza)]

Hello,

I believe this issue was a duplicate of bug #740126: in fact, Xorg stopped freezing when bug #740126 was fixed.

Marking this as a duplicate.