[i945] another happy X freeze in karmic [i945GM]

[Steve Langasek]

Binary package hint: xserver-xorg-video-intel

Everything still working on the machine after the freeze, except for video.

DRI debug tarball to follow.

ProblemType: Bug
Architecture: amd64
Date: Wed Oct 7 11:06:39 2009
DistroRelease: Ubuntu 9.10
Lsusb:
 Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
 Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
MachineType: LENOVO 6371CTO
Package: xserver-xorg-video-intel 2:2.8.1-1ubuntu2
PccardctlIdent:
 Socket 0:
   no product info available
PccardctlStatus:
 Socket 0:
   no card
ProcCmdLine: root=/dev/mapper/hostname-root ro quiet splash
ProcEnviron:
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-11.38-generic
RelatedPackageVersions:
 xserver-xorg 1:7.4+3ubuntu5
 libgl1-mesa-glx 7.6.0~git20090817.7c422387-0ubuntu7
 libdrm2 2.4.13-1ubuntu1
 xserver-xorg-video-intel 2:2.8.1-1ubuntu2
 xserver-xorg-video-ati 1:6.12.99+git20090825.fc74e119-0ubuntu2
SourcePackage: xserver-xorg-video-intel
Uname: Linux 2.6.31-11-generic x86_64
dmi.bios.date: 12/27/2006
dmi.bios.vendor: LENOVO
dmi.bios.version: 7IET23WW (1.04 )
dmi.board.name: 6371CTO
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvr7IET23WW(1.04):bd12/27/2006:svnLENOVO:pn6371CTO:pvrThinkPadT60:rvnLENOVO:rn6371CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 6371CTO
dmi.product.version: ThinkPad T60
dmi.sys.vendor: LENOVO
fglrx: Not loaded
system:
 distro: Ubuntu
 architecture: x86_64kernel: 2.6.31-11-generic

[lspci]
00:02.0 VGA compatible controller [0300]: Intel Corporation Mobile 945GM/GMS, 943/940GML Express Integrated Graphics Controller [8086:27a2] (rev 03)
     Subsystem: Lenovo Device [17aa:201a]

[Geir Ove Myhr (gomyhr)]

We have had several reports of freezes (GPU hangs) on i945 chipsets
(945G, 945GM and 945GME, all of which uses the GMA950 graphics core)
in Karmic. I would like to get some testing going so that we may
identify the cause and give upstream all the information they need
(and possibly some they do not need) so that they can fix this before
Lucid is out. I have set up a wiki page to coordinate the effort:
https://wiki.ubuntu.com/X/Lucidi945Freezes . There is a list of test
that I think will be useful in order to isolate where the problem is
and a table where you can fill in your test results. If we're lucky
there is only one underlying problem, and we will probably get
consistent test results. Otherwise, different test results may group
the problems in different categories.

I realize that doing all the tests can be quite time consuming (it
calls for tests on both Karmic and Lucid), and if you are only able to
do some of the tests it would be nice if you could fill in those cells
in the test result table.

My initial guess is that the bug is in mesa, since it seems to be
related to 3D operations. It would be nice if we could also get some
testing of different mesa versions, but I'm not aware of any that are
pre-built yet.

[Steve Langasek (vorlon)]

Where do you see that this is related to 3d operations?

I don't think a kernel-level dri freeze can reasonably be considered a mesa bug in any case.

I'm now running lucid on this laptop and have not seen this freeze with the current 2.6.32 kernel; that also means I'm unlikely to invest any time into retesting with karmic. If no one else is seeing this hang, I think the bug can probably be marked as closed.

[Geir Ove Myhr (gomyhr)]

Thank you for the update, Steve. I'm closing this.

I have had one user confirm that his i945 freezes continue under Lucid (bug 475429) and two Karmic users with i945 confirm that downgrading mesa to 7.5 helps. But that (or those) bug(s) is probably different from the one you had.

And why do I think a GPU hang can be a mesa bug? I read http://bugs.freedesktop.org/show_bug.cgi?id=24825 comment #10 from Carl Worth, which seems to indicate that. You probably know the details better than me, but couldn't a dri freeze be a bug in src/mesa/drivers/dri/i915 in mesa? Or how do you see that it is kernel level?

[Steve Langasek (vorlon)]

The freeze happens /at/ the kernel level. If mesa can cause this, it's still a bug in the kernel driver for permitting it to get into that state. :)