Ubuntu
xserver-xorg-video-intel package

[i945gm] [lucid] LCD "flashes" and jumps horizontally quite a lot

Bug #506444 reported by Stefano Rivera on 2010-01-12

This bug affects 3 people

Affects		Status	Importance	Assigned to	Milestone
	linux (Ubuntu)	Fix Released	Medium	Unassigned
	xserver-xorg-video-intel (Ubuntu)	Fix Released	Low	Unassigned

Bug Description

Binary package hint: xserver-xorg-video-intel

Excuse the wishy-washy bug report, but I can't find any logs showing anything out of the ordinary or a way to reliably trigger it.

The LCD flashes-black for a fraction of a second quite often (sometimes multiple times in a minute). It looks like a driver or hardware is resetting. Occasionally a section of the screen is noticeably corrupted during this, before it re-draws.
Sometimes the whole display appears to jump left by something on the order of 10 pixels.

If this happens while playing a video, the GPU locks up (well screen goes black, VTs are inaccessible, and the machine has to be rebooted to get X to start again).

Possibly related to bug #422072

ProblemType: Bug
Architecture: amd64
Date: Tue Jan 12 16:31:04 2010
DistroRelease: Ubuntu 10.04
MachineType: Apple Inc. MacBook2,1
Package: xserver-xorg-video-intel 2:2.9.1-1ubuntu1
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.32-10-generic root=UUID=3345fa7f-d2c4-456f-8d0d-8fdb515433f7 ro single
ProcEnviron:
LANGUAGE=en_ZA.UTF-8
PATH=(custom, user)
LANG=en_ZA.UTF-8
SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.32-10.14-generic
RelatedPackageVersions:
xserver-xorg 1:7.5+1ubuntu1
libgl1-mesa-glx 7.7-0ubuntu3
libdrm2 2.4.17-0ubuntu1
xserver-xorg-video-intel 2:2.9.1-1ubuntu1
xserver-xorg-video-ati 1:6.12.99+git20091125.0061c4db-0ubuntu2
SourcePackage: xserver-xorg-video-intel
Tags: lucid
Uname: Linux 2.6.32-10-generic x86_64
dmi.bios.date: 06/27/07
dmi.bios.vendor: Apple Inc.
dmi.bios.version: MB21.88Z.00A5.B07.0706270922
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: Mac-F4208CAA
dmi.board.vendor: Apple Inc.
dmi.board.version: PVT
dmi.chassis.asset.tag: Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: Apple Inc.
dmi.chassis.version: Mac-F4208CAA
dmi.modalias: dmi:bvnAppleInc.:bvrMB21.88Z.00A5.B07.0706270922:bd06/27/07:svnAppleInc.:pnMacBook2,1:pvr1.0:rvnAppleInc.:rnMac-F4208CAA:rvrPVT:cvnAppleInc.:ct10:cvrMac-F4208CAA:
dmi.product.name: MacBook2,1
dmi.product.version: 1.0
dmi.sys.vendor: Apple Inc.
fglrx: Not loaded
glxinfo: Error: [Errno 2] No such file or directory
system:
distro: Ubuntu
architecture: x86_64kernel: 2.6.32-10-generic

See original description

Tags:

Revision history for this message

Stefano Rivera (stefanor) wrote on 2010-01-12:

BootDmesg.txt Edit (44.5 KiB, text/plain; charset="utf-8")
CurrentDmesg.txt Edit (4.4 KiB, text/plain; charset="utf-8")
Dependencies.txt Edit (3.3 KiB, text/plain; charset="utf-8")
Lspci.txt Edit (11.7 KiB, text/plain; charset="utf-8")
Lsusb.txt Edit (557 bytes, text/plain; charset="utf-8")
PciDisplay.txt Edit (1.3 KiB, text/plain; charset="utf-8")
ProcCpuinfo.txt Edit (1.4 KiB, text/plain; charset="utf-8")
ProcInterrupts.txt Edit (1.4 KiB, text/plain; charset="utf-8")
ProcModules.txt Edit (3.5 KiB, text/plain; charset="utf-8")
UdevDb.txt Edit (110.8 KiB, text/plain; charset="utf-8")
UdevLog.txt Edit (242.0 KiB, text/plain; charset="utf-8")
XorgConf.txt Edit (1.2 KiB, text/plain; charset="utf-8")
XorgLog.txt Edit (42.9 KiB, text/plain; charset="utf-8")
XorgLogOld.txt Edit (34.6 KiB, text/plain; charset="utf-8")
Xrandr.txt Edit (5.6 KiB, text/plain; charset="utf-8")
monitors.xml.txt Edit (4.2 KiB, text/plain; charset="utf-8")
setxkbmap.txt Edit (368 bytes, text/plain; charset="utf-8")
xdpyinfo.txt Edit (19.1 KiB, text/plain; charset="utf-8")
xkbcomp.txt Edit (47.6 KiB, text/plain; charset="utf-8")

Stefano Rivera (stefanor) on 2010-01-12

description:

updated

Revision history for this message

Stefano Rivera (stefanor) wrote on 2010-01-13:

As of this morning's updates. Starting X results in a GPU hang.
Xorg spends 100% of CPU time in kernel mode, and the kernel starts complaining:

[ 360.480027] INFO: task i915/0:293 blocked for more than 120 seconds.
[ 360.480032] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 360.480034] i915/0 D 00000000ffffffff 0 293 2 0x00000000
[ 360.480039] ffff880097d6dd40 0000000000000046 0000000000015ac0 0000000000015ac0
[ 360.480044] ffff8800981a1ab0 ffff880097d6dfd8 0000000000015ac0 ffff8800981a16f0
[ 360.480048] 0000000000015ac0 ffff880097d6dfd8 0000000000015ac0 ffff8800981a1ab0
[ 360.480052] Call Trace:
[ 360.480063] [<ffffffff81575d17>] __mutex_lock_slowpath+0xe7/0x170
[ 360.480070] [<ffffffff81055200>] ? finish_task_switch+0x50/0xd0
[ 360.480073] [<ffffffff81575c0b>] mutex_lock+0x2b/0x50
[ 360.480111] [<ffffffffa00c691d>] i915_gem_retire_work_handler+0x3d/0xa0 [i915]
[ 360.480120] [<ffffffffa00c68e0>] ? i915_gem_retire_work_handler+0x0/0xa0 [i915]
[ 360.480126] [<ffffffff8107ead7>] run_workqueue+0xc7/0x1a0
[ 360.480129] [<ffffffff8107ec53>] worker_thread+0xa3/0x110
[ 360.480133] [<ffffffff81083680>] ? autoremove_wake_function+0x0/0x40
[ 360.480136] [<ffffffff8107ebb0>] ? worker_thread+0x0/0x110
[ 360.480139] [<ffffffff81083306>] kthread+0x96/0xa0
[ 360.480143] [<ffffffff810141ea>] child_rip+0xa/0x20
[ 360.480146] [<ffffffff81083270>] ? kthread+0x0/0xa0
[ 360.480149] [<ffffffff810141e0>] ? child_rip+0x0/0x20

Steffen Röcker (sroecker) on 2010-01-15

Changed in xserver-xorg-video-intel (Ubuntu):
status:	New → Confirmed

Revision history for this message

Steffen Röcker (sroecker) wrote on 2010-01-15:

I can confirm this, it looks like the screen is shaking up and down very shortly.
I don't know if it's related, but I get this all the time:
Jan 15 15:44:47 helios kernel: [ 1006.048114] Skipping EDID probe due to cached edid
Jan 15 15:44:47 helios kernel: [ 1006.130362] [drm] TV-16: set mode NTSC 480i 0
Jan 15 15:44:47 helios kernel: [ 1006.296284] [drm] TV-16: set mode NTSC 480i 0

It also sometimes crashes and the screen is either black or a single color, but this seems to be another bug.

Backtrace:
0: /usr/bin/X (xorg_backtrace+0x3b) [0x80e135b]
1: /usr/bin/X (0x8048000+0x60a8d) [0x80a8a8d]
2: (vdso) (__kernel_rt_sigreturn+0x0) [0xbd3410]
3: /usr/bin/X (DisableDevice+0x21f) [0x80790ef]
4: /usr/bin/X (xf86Wakeup+0x3bd) [0x80b406d]
5: /usr/bin/X (WakeupHandler+0x52) [0x809dfd2]
6: /usr/bin/X (WaitForSomething+0x1aa) [0x80a7c9a]
7: /usr/bin/X (0x8048000+0x49da0) [0x8091da0]
8: /usr/bin/X (0x8048000+0x1ecfa) [0x8066cfa]
9: /lib/tls/i686/cmov/libc.so.6 (__libc_start_main+0xe6) [0x277bd6]
10: /usr/bin/X (0x8048000+0x1e8e1) [0x80668e1]
Segmentation fault at address 0x4

Caught signal 11 (Segmentation fault). Server aborting

00:02.1 Display controller: Intel Corporation Mobile 945GM/GMS/GME, 943/940GML Express Integrated Graphics Controller (rev 03)
Linux helios 2.6.32-10-generic #14-Ubuntu SMP Thu Jan 7 17:38:40 UTC 2010 i686 GNU/Linux
xserver-xorg-video-intel 2:2.9.1-1ubuntu1

Revision history for this message

Steffen Röcker (sroecker) wrote on 2010-01-16:

Sorry, forget the backtrace, it was an old one for another bug.

If I start X with INTEL_DEBUG=1 it seems to take longer to crash.
Unfortunately I was unable to get a batchbuffer dump.

Revision history for this message

Steffen Röcker (sroecker) wrote on 2010-01-16:

LVDS clockdown could be the cause of this, see:
http://lists.freedesktop.org/archives/intel-gfx/2010-January/005347.html

There is a patch on intel-gfx, I will wait until it's in the drm-intel-next kernel and try if it fixes this.

Revision history for this message

Steffen Röcker (sroecker) wrote on 2010-01-23:

dri_debug-20100123.tgz Edit (251.6 KiB, application/x-tar)

This bug was fixed for me with the patch for bug #492392. (Which disables powersave for i915)
There is no flicker and it runs stable for hours.

I tried out linux 2.6.33-020633rc5-generic from the kernel-ppa with i915.lvds_downclock=0.
There was no flicker but it crashed (gray screen, but still able to login via ssh) after a few minutes, this time though I was able to get a batchbuffer dump.

Jeremy Foshee (jeremyfoshee) on 2010-02-04

Changed in xserver-xorg-video-intel (Ubuntu):
status:	Confirmed → Fix Released
importance:	Undecided → Low

Revision history for this message

Jeremy Foshee (jeremyfoshee) wrote on 2010-02-04:

Fix Released per comment #6. From my research, I can confirm that the settings addressed in the patch for the bug mentioned are now set to default behavior for i915.

-JFo

Jeremy Foshee (jeremyfoshee) on 2010-02-05

Changed in linux (Ubuntu):
status:	New → Fix Released
importance:	Undecided → Medium

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[i945gm] [lucid] LCD "flashes" and jumps horizontally quite a lot

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Ubuntu
xserver-xorg-video-intel package