[Problem]
On Ubuntu there appears to be a race condition in libdrm during boot. It appears the i915 drm device exists but isn't fully initialized at the time plymouth wants to use it.
Note I'm filing this against -intel just because it's the intel portion of libdrm where the code is passing through; I think this is really a libdrm bug.
[Original Description]
After a force restart of Ubuntu, I've got a System Crash error after logging in.
This looks more like a libdrm bug. There's a race condition with the i915 device not being ready by the time plymouth is starting. Possibly it's because it doesn't have drm master.
dmi.bios.date: 01/19/2012
dmi.bios.vendor: LENOVO
dmi.bios.version: 8BET56WW (1.36 )
dmi.board.asset.tag: Not Available
dmi.board.name: 4284BZ4
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:bvr8BET56WW(1.36):bd01/19/2012:svnLENOVO:pn4284BZ4:pvrThinkPadW520:rvnLENOVO:rn4284BZ4:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 4284BZ4
dmi.product.version: ThinkPad W520
dmi.sys.vendor: LENOVO
Forwarding this bug from Ubuntu reporter Florin: bugs.launchpad. net/ubuntu/ +source/ xserver- xorg-video- intel/+ bug/966868
http://
[Problem]
On Ubuntu there appears to be a race condition in libdrm during boot. It appears the i915 drm device exists but isn't fully initialized at the time plymouth wants to use it.
Note I'm filing this against -intel just because it's the intel portion of libdrm where the code is passing through; I think this is really a libdrm bug.
[Original Description]
After a force restart of Ubuntu, I've got a System Crash error after logging in.
lsb_release -rd
Description: Ubuntu precise (development branch)
Release: 12.04
This looks more like a libdrm bug. There's a race condition with the i915 device not being ready by the time plymouth is starting. Possibly it's because it doesn't have drm master.
<Sarvatt> apparently chromeos works around it with http:// git.chromium. org/gitweb/ ?p=chromiumos/ third_party/ kernel. git;a=commit; h=32a8c5b67163a 6ae211ff2683c99 9b6ad2c76d1f but thats just working around the problem..
googling intel/intel_ bufmgr_ gem.c:2783 turns up a lot of hits.
The code in question with the assert is:
if (IS_GEN2( bufmgr_ gem->pci_ device) )
bufmgr_ gem->gen = 2; bufmgr_ gem->pci_ device) )
bufmgr_ gem->gen = 3; bufmgr_ gem->pci_ device) )
bufmgr_ gem->gen = 4; bufmgr_ gem->pci_ device) )
bufmgr_ gem->gen = 5; bufmgr_ gem->pci_ device) )
bufmgr_ gem->gen = 6; bufmgr_ gem->pci_ device) )
bufmgr_ gem->gen = 7;
assert( 0);
else if (IS_GEN3(
else if (IS_GEN4(
else if (IS_GEN5(
else if (IS_GEN6(
else if (IS_GEN7(
else
$ xpci 8086:0126
snb-m-gt2+ (8086:0126) sandybridge
So it should be going into the IS_GEN6 branch.
Thanks!
ProblemType: Crash ature: Ubuntu 3.2.0-20.33-generic 3.2.12 themes/ ubuntu- logo/ubuntu- logo.plymouth /boot/vmlinuz- 3.2.0-20- generic root=UUID= f1bb4518- a890-49c0- 9339-ecc3d8bd26 58 ro quiet splash vt.handoff=7 /boot/vmlinuz- 3.2.0-20- generic root=UUID= f1bb4518- a890-49c0- 9339-ecc3d8bd26 58 ro quiet splash vt.handoff=7 themes/ ubuntu- text/ubuntu- text.plymouth
DistroRelease: Ubuntu 12.04
Package: plymouth 0.8.2-2ubuntu28
ProcVersionSign
Uname: Linux 3.2.0-20-generic x86_64
ApportVersion: 1.95-0ubuntu1
Architecture: amd64
Date: Wed Mar 28 09:33:16 2012
DefaultPlymouth: /lib/plymouth/
ExecutablePath: /sbin/plymouthd
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha amd64 (20120322)
MachineType: LENOVO 4284BZ4
ProcCmdLine: BOOT_IMAGE=
ProcCmdline: /sbin/plymouthd --mode=boot --attach-to-session
ProcEnviron:
TERM=linux
PATH=(custom, no user)
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=
Signal: 6
SourcePackage: plymouth
TextPlymouth: /lib/plymouth/
Title: plymouthd crashed with SIGABRT in raise()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:
dmi.bios.date: 01/19/2012 asset.tag: Not Available asset.tag: No Asset Information version: Not Available bvr8BET56WW( 1.36):bd01/ 19/2012: svnLENOVO: pn4284BZ4: pvrThinkPadW520 :rvnLENOVO: rn4284BZ4: rvrNotAvailable :cvnLENOVO: ct10:cvrNotAvai lable: version: ThinkPad W520
dmi.bios.vendor: LENOVO
dmi.bios.version: 8BET56WW (1.36 )
dmi.board.
dmi.board.name: 4284BZ4
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.
dmi.modalias: dmi:bvnLENOVO:
dmi.product.name: 4284BZ4
dmi.product.
dmi.sys.vendor: LENOVO