[sna] Hard hang when logging in

[Christopher Townsend]

*This bug is actually for version 2.20.19-0ubuntu1.* I had to revert the package to 2.20.18-0ubuntu1 in order to get a desktop and not lock the system.

When logging in through lightdm, the machine would hang hard before getting to the desktop. I could not diagnose what the issue may be because of the hard hang.

ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: xserver-xorg-video-intel 2:2.20.19-0ubuntu1
ProcVersionSignature: Ubuntu 3.8.0-1.5-generic 3.8.0-rc4
Uname: Linux 3.8.0-1-generic x86_64
.tmp.unity.support.test.1:

ApportVersion: 2.8-0ubuntu2
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: compiz
Date: Wed Jan 23 15:41:07 2013
DistUpgraded: 2013-01-04 15:43:42,670 DEBUG enabling apt cron job
DistroCodename: raring
DistroVariant: ubuntu
DkmsStatus: vboxhost, 4.2.6, 3.8.0-0-generic, x86_64: installed
ExtraDebuggingInterest: Yes
GraphicsCard:
 Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller [8086:0116] (rev 07) (prog-if 00 [VGA controller])
   Subsystem: Dell Device [1028:04ca]
 Advanced Micro Devices [AMD] nee ATI Caicos [Radeon HD 6400M/7400M Series] [1002:6760] (prog-if 00 [VGA controller])
   Subsystem: Dell Device [1028:04ca]
InstallationDate: Installed on 2012-11-13 (70 days ago)
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
MachineType: Dell Inc. Inspiron N5110
MarkForUpload: True
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.8.0-1-generic root=UUID=a40beba5-f143-4cf4-9826-98d1fe09490d ro quiet splash vt.handoff=7
SourcePackage: xserver-xorg-video-intel
UpgradeStatus: Upgraded to raring on 2013-01-04 (18 days ago)
dmi.bios.date: 12/20/2010
dmi.bios.vendor: Dell Inc.
dmi.bios.version: X17
dmi.board.vendor: Dell Inc.
dmi.board.version: X17
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: Not Specified
dmi.modalias: dmi:bvnDellInc.:bvrX17:bd12/20/2010:svnDellInc.:pnInspironN5110:pvrNotSpecified:rvnDellInc.:rn:rvrX17:cvnDellInc.:ct8:cvrNotSpecified:
dmi.product.name: Inspiron N5110
dmi.product.version: Not Specified
dmi.sys.vendor: Dell Inc.
version.compiz: compiz 1:0.9.9~daily13.01.21-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.41-0ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 9.0.1-0ubuntu1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 9.0.1-0ubuntu1
version.xserver-xorg-core: xserver-xorg-core 2:1.13.1.901-0ubuntu2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.0.0-0ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.20.18-0ubuntu1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.6-0ubuntu1
xserver.bootTime: Wed Jan 23 15:30:10 2013
xserver.configfile: default
xserver.errors:

xserver.logfile: /var/log/Xorg.0.log
xserver.version: 2:1.13.1.901-0ubuntu2
xserver.video_driver: intel

[Timo Aaltonen (tjaalton)]

does it hang with the old version with this xorg.conf?

https://wiki.ubuntu.com/X/Testing/IntelSNA?action=AttachFile&do=view&target=xorg.conf

[Christopher Townsend (townsend)]

@Timo,

Yes, it does hang using that xorg.conf and the old version of xserver-xorg-video-intel package.

[Timo Aaltonen (tjaalton)]

there's a newer driver upload available since earlier today, try if it's any better with it.

[Christopher Townsend (townsend)]

@Timo,

I tried version 2.20.19-0ubuntu2 and still get the hang.

[Timo Aaltonen (tjaalton)]

Could you provide the Xorg log from the hanging session? It should be Xorg.0.log.old after you've rebooted. Although it's possible that the system is unable to log anything at that point..

try a mainline kernel snapshot as well:

http://kernel.ubuntu.com/~kernel-ppa/mainline/drm-intel-nightly/2013-01-24-raring/

[Christopher Townsend (townsend)]

I've attached the Xorg.0.log.old for you viewing pleasure:)

I also tried the latest mainline kernel as you suggested and still get the hang.

Instead of reverting the package, I modified that Xorg.conf file you provided earlier and changed AccelMethod sna to uxa and of course it works now.

One other thing that occurred to me in. This machine is a pre-production version of a Dell Inspiron N5110 which is "borrowed" from PES. The BIOS is a pre-production BIOS and I have no way to upgrade it to the A Rev production BIOS. I wonder if that is playing into this since no one else seems to be affected by this (yet).

[Timo Aaltonen (tjaalton)]

[ 25.596] (WW) intel(0): Detected unsupported/dysfunctional hardware, disabling acceleration.
[ 25.836] (WW) intel(0): cannot enable XVideo whilst the GPU is wedged
[ 25.836] (WW) intel(0): loading DRI2 whilst the GPU is wedged.

so the reason it fails with sna is that even though it's broken pre-production hw, DRI2 is loaded whereas with uxa it isn't.

[Timo Aaltonen (tjaalton)]

let's face it that this won't get fixed at this point