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Message #00861
[Bug 1041790]
I tried it patch on linux-3.11_rc1, but when X starting I see:
791966 Jul 21 16:17:07 localhost kernel: [ 19.320879] BUG: unable to handle kernel NULL pointer dereference at 0000000000000010
791967 Jul 21 16:17:07 localhost kernel: [ 19.320948] IP: [<ffffffff8136bfc0>] gen6_add_request+0xe7/0x178
791968 Jul 21 16:17:07 localhost kernel: [ 19.320995] PGD b0d80067 PUD b0c18067 PMD 0
791969 Jul 21 16:17:07 localhost kernel: [ 19.321031] Oops: 0000 [#1] PREEMPT SMP
791970 Jul 21 16:17:07 localhost kernel: [ 19.321064] Modules linked in: snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_intel snd_hda_codec brcmsmac snd_hwdep snd_p cm cordic brcmutil bcma snd_page_alloc snd_timer snd soundcore
791971 Jul 21 16:17:07 localhost kernel: [ 19.321209] CPU: 0 PID: 2696 Comm: X Not tainted 3.11.0-rc1 #1
791972 Jul 21 16:17:07 localhost kernel: [ 19.321249] Hardware name: SAMSUNG ELECTRONICS CO., LTD. SF311/SF411/SF511/SF311/SF411/SF511, BIOS 06HW.M011.20110503.SCY 05 /03/2011
791973 Jul 21 16:17:07 localhost kernel: [ 19.321322] task: ffff8800b1c07590 ti: ffff8800b0c24000 task.ti: ffff8800b0c24000
791974 Jul 21 16:17:07 localhost kernel: [ 19.321370] RIP: 0010:[<ffffffff8136bfc0>] [<ffffffff8136bfc0>] gen6_add_request+0xe7/0x178
791975 Jul 21 16:17:07 localhost kernel: [ 19.321426] RSP: 0018:ffff8800b0c25bc8 EFLAGS: 00010286
791976 Jul 21 16:17:07 localhost kernel: [ 19.321461] RAX: 0000000000000000 RBX: ffff8800b1c3d4d8 RCX: 0000000000027330
791977 Jul 21 16:17:07 localhost kernel: [ 19.321506] RDX: 0000000000000080 RSI: ffffc900045c003c RDI: ffffc900045c0038
791978 Jul 21 16:17:07 localhost kernel: [ 19.321550] RBP: ffff8800b0c25c08 R08: ffff8800b0d97f00 R09: 00000000000145c0
791979 Jul 21 16:17:07 localhost kernel: [ 19.321594] R10: 0000000000001000 R11: ffff8800b1c3c000 R12: 0000000000000000
791980 Jul 21 16:17:07 localhost kernel: [ 19.321638] R13: 0000000000002044 R14: 0000000000000000 R15: ffff8800b1c3c000
791981 Jul 21 16:17:07 localhost kernel: [ 19.321682] FS: 00007ff167ae8880(0000) GS:ffff880100200000(0000) knlGS:0000000000000000
791982 Jul 21 16:17:07 localhost kernel: [ 19.321732] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
791983 Jul 21 16:17:07 localhost kernel: [ 19.321767] CR2: 0000000000000010 CR3: 00000000b1cc9000 CR4: 00000000000407f0
791984 Jul 21 16:17:07 localhost kernel: [ 19.321810] Stack:
791985 Jul 21 16:17:07 localhost kernel: [ 19.321824] ffff8800b1c3d4d8 0000000000000000 ffff8800aff24000 0000000000000000
791986 Jul 21 16:17:07 localhost kernel: [ 19.321876] ffff8800b1c3c000 ffff8800b0d97f00 ffff8800b1f66a00 ffff8800b1c3d4d8
791987 Jul 21 16:17:07 localhost kernel: [ 19.321927] ffff8800b0c25c68 ffffffff81334b11 ffff880000000028 0000000000000000
791988 Jul 21 16:17:07 localhost kernel: [ 19.321979] Call Trace:
791989 Jul 21 16:17:07 localhost kernel: [ 19.322000] [<ffffffff81334b11>] __i915_add_request+0x6d/0x215
791990 Jul 21 16:17:07 localhost kernel: [ 19.322045] [<ffffffff8133b8d9>] i915_gem_do_execbuffer.isra.14+0xd07/0xdc5
791991 Jul 21 16:17:07 localhost kernel: [ 19.322089] [<ffffffff8133bd5e>] ? i915_gem_execbuffer2+0x5d/0x1e3
791992 Jul 21 16:17:07 localhost kernel: [ 19.322128] [<ffffffff8133be5a>] i915_gem_execbuffer2+0x159/0x1e3
791993 Jul 21 16:17:07 localhost kernel: [ 19.322170] [<ffffffff8130e167>] drm_ioctl+0x302/0x446
791994 Jul 21 16:17:07 localhost kernel: [ 19.322204] [<ffffffff8133bd01>] ? i915_gem_execbuffer+0x36a/0x36a
791995 Jul 21 16:17:07 localhost kernel: [ 19.322245] [<ffffffff8102a823>] ? __do_page_fault+0x34f/0x3f3
791996 Jul 21 16:17:07 localhost kernel: [ 19.322285] [<ffffffff810d3621>] vfs_ioctl+0x21/0x34
791997 Jul 21 16:17:07 localhost kernel: [ 19.322317] [<ffffffff810d3e7a>] do_vfs_ioctl+0x3b8/0x3fb
791998 Jul 21 16:17:07 localhost kernel: [ 19.322353] [<ffffffff810dbab9>] ? fget_light+0xa1/0xb8
791999 Jul 21 16:17:07 localhost kernel: [ 19.322387] [<ffffffff810d3efd>] SyS_ioctl+0x40/0x6b
792000 Jul 21 16:17:07 localhost kernel: [ 19.322420] [<ffffffff816450d2>] system_call_fastpath+0x16/0x1b
792001 Jul 21 16:17:07 localhost kernel: [ 19.322457] Code: e8 d4 c0 f0 ff 8b 73 2c 44 89 ef 83 c6 04 89 73 2c 48 03 73 10 e8 bf c0 f0 ff 8b 73 2c 48 8b 45 c8 83 c6 0 4 89 73 2c 48 03 73 10 <8b> 78 10 83 ef 80 e8 a3 c0 f0 ff 83 43 2c 04 49 ff c4 49 83 fc
792002 Jul 21 16:17:07 localhost kernel: [ 19.322688] RIP [<ffffffff8136bfc0>] gen6_add_request+0xe7/0x178
792003 Jul 21 16:17:07 localhost kernel: [ 19.322728] RSP <ffff8800b0c25bc8>
792004 Jul 21 16:17:07 localhost kernel: [ 19.322750] CR2: 0000000000000010
792005 Jul 21 16:17:07 localhost kernel: [ 19.330669] ---[ end trace b13215eb98a2df5f ]---
--
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https://bugs.launchpad.net/bugs/1041790
Title:
[snb] GPU lockup IPEHR: 0x0b160001 IPEHR: 0x0b140001, workaround
i915.semaphores=0
Status in X.org xf86-video-intel:
Confirmed
Status in “linux” package in Ubuntu:
Confirmed
Status in “sandybridge-meta” package in Ubuntu:
Confirmed
Status in “xserver-xorg-video-intel” package in Ubuntu:
Triaged
Bug description:
X locks up periodically for a 2 to ten seconds at a time and this
crash log gets generated. It's significantly more than several times a
day but not quite continuous.
Temporarily disabiling semaphores seems to eliminate the problem.
E.g.:
$ sudo -s
# echo 0 > /sys/modules/i915/parameters/semaphores
[Workaround]
1. Edit your /etc/defaults/grub file.
2. Change this line:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
to
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash i915.semaphores=0"
3. Then run
sudo update-grub
4. And reboot
If you indeed have this bug, that should stop the lockups from happening.
If it doesn't, then file a new bug report.
Side Effects: Rendering throughput is dropped by 10% with SNA, or as
much as 3x with UXA. OpenGL performance is likely to be reduced by
about 30%. More CPU time is spent waiting for the GPU with rc6
disabled, so increased power consumption.
[Original Report]
ProblemType: Crash
DistroRelease: Ubuntu 12.10
Package: xserver-xorg-video-intel 2:2.20.3-0ubuntu1
Uname: Linux 3.6.0-rc3-git-20120826.1015 x86_64
ApportVersion: 2.5.1-0ubuntu2
Architecture: amd64
Chipset: sandybridge-m-gt2
Date: Sun Aug 26 16:06:32 2012
DistroCodename: quantal
DistroVariant: ubuntu
DuplicateSignature: [sandybridge-m-gt2] GPU lockup IPEHR: 0x0b160001 IPEHR: 0x0b140001 Ubuntu 12.10
EcryptfsInUse: Yes
ExecutablePath: /usr/share/apport/apport-gpu-error-intel.py
GpuHangFrequency: Continuously
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Alpha amd64 (20120724.2)
InterpreterPath: /usr/bin/python3.2mu
MachineType: Dell Inc. Dell System XPS L502X
ProcCmdline: /usr/bin/python3 /usr/share/apport/apport-gpu-error-intel.py
ProcEnviron:
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.6.0-rc3-git-20120826.1015 root=UUID=135c8090-427c-460a-909d-eff262cd44b6 ro quiet splash vt.handoff=7
RelatedPackageVersions:
xserver-xorg 1:7.7+1ubuntu3
libdrm2 2.4.38-0ubuntu2
xserver-xorg-video-intel 2:2.20.3-0ubuntu1
SourcePackage: xserver-xorg-video-intel
Title: [sandybridge-m-gt2] GPU lockup IPEHR: 0x0b160001 IPEHR: 0x0b140001
UdevDb: Error: [Errno 2] No such file or directory: 'udevadm'
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:
dmi.bios.date: 05/29/2012
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A11
dmi.board.name: 0NJT03
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: 0.1
dmi.modalias: dmi:bvnDellInc.:bvrA11:bd05/29/2012:svnDellInc.:pnDellSystemXPSL502X:pvr:rvnDellInc.:rn0NJT03:rvrA00:cvnDellInc.:ct8:cvr0.1:
dmi.product.name: Dell System XPS L502X
dmi.sys.vendor: Dell Inc.
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