When using unity or a Ubuntu classic session with compiz, there are spurious [drm:i915_hangcheck_ring_idle] *ERROR* Hangcheck timer elapsed... blt ring idle [waiting on 9004, at 9004], missed IRQ? visible in dmesg. The display stops updating for a fraction of a second when it happens. This can be forcibly reproduced by doing vblank_mode=0 glxgears with compiz active and it is specific to sandybridge systems. Disabling sync to vblank in compiz doesn't have any effect, and the problem does not happen when using metacity.
The hangcheck messages are gone in 2.6.39-rc3 kernel, but the root problem still remains in that the display updates erratically when it happens.
Binary package hint: xserver- xorg-video- intel
When using unity or a Ubuntu classic session with compiz, there are spurious [drm:i915_ hangcheck_ ring_idle] *ERROR* Hangcheck timer elapsed... blt ring idle [waiting on 9004, at 9004], missed IRQ? visible in dmesg. The display stops updating for a fraction of a second when it happens. This can be forcibly reproduced by doing vblank_mode=0 glxgears with compiz active and it is specific to sandybridge systems. Disabling sync to vblank in compiz doesn't have any effect, and the problem does not happen when using metacity.
The hangcheck messages are gone in 2.6.39-rc3 kernel, but the root problem still remains in that the display updates erratically when it happens.
ProblemType: Bug xorg-video- intel 2:2.14.0-4ubuntu7 ature: Ubuntu 2.6.38-8.42-generic 2.6.38.2 dules: wl detection, composite, opengl, decor,mousepoll ,vpswitch, regex,animation ,snap,expo, move,compiztool box,place, grid,imgpng, gnomecompat, wall,ezoom, workarounds, staticswitcher, resize, fade,unitymtgra bhandles, scale,session, unityshell] hangcheck_ ring_idle] *ERROR* Hangcheck timer elapsed... blt ring idle [waiting on 9004, at 9004], missed IRQ? hangcheck_ ring_idle] *ERROR* Hangcheck timer elapsed... blt ring idle [waiting on 13936, at 13936], missed IRQ? oom_score_ adj instead. //wAw5OsCAAAAAA AUAQSQHxF4Cp7ln V9XnCYaUFQAAAAB AQEBAQEBAQEBAQE BAQEBWBtWflAADj AkMDUANa4QAAAZP hJWflAADjAkMDUA Na4QAAAZAAAA/ gBLSjI2MhQxNDBX SDQKAAAAAAAAQTG UAAAAAAEBCiAgAI 4= 020639rc3- generic, i686: installed /boot/vmlinuz- 2.6.38- 8-generic root=UUID= 4eac9a69- 2bfe-4b4b- b469-5e6f7a89e0 f1 ro quiet splash vt.handoff=7 xorg-video- intel :bvrX66: bd02/25/ 2011:svnDellInc .:pnLatitudeE64 20:pvr01: rvnDellInc. :rn:rvr: cvnDellInc. :ct9:cvr: version: 01 bzr20110411- 0ubuntu1 libgl1- mesa-dri: libgl1-mesa-dri 7.10.2-0ubuntu1 libgl1- mesa-dri- experimental: libgl1- mesa-dri- experimental N/A libgl1- mesa-glx: libgl1-mesa-glx 7.10.2-0ubuntu1 xserver- xorg: xserver-xorg 1:7.6+4ubuntu3 xserver- xorg-video- ati: xserver- xorg-video- ati 1:6.14.0-0ubuntu4 xserver- xorg-video- intel: xserver- xorg-video- intel 2:2.14.0-4ubuntu7 xserver- xorg-video- nouveau: xserver- xorg-video- nouveau 1:0.0.16+ git20110107+ b795ca6e- 0ubuntu7
DistroRelease: Ubuntu 11.04
Package: xserver-
ProcVersionSign
Uname: Linux 2.6.38-8-generic i686
NonfreeKernelMo
Architecture: i386
CompizPlugins: [core,bailer,
CompositorRunning: compiz
CurrentDmesg:
[ 20.310859] [drm:i915_
[ 32.279371] [drm:i915_
[ 141.319196] exe (1718): /proc/1718/oom_adj is deprecated, please use /proc/1718/
DRM.card0.DP.1:
status: disconnected
enabled: disabled
dpms: Off
modes:
edid-base64:
DRM.card0.DP.2:
status: disconnected
enabled: disabled
dpms: Off
modes:
edid-base64:
DRM.card0.DP.3:
status: disconnected
enabled: disabled
dpms: Off
modes:
edid-base64:
DRM.card0.HDMI.A.1:
status: disconnected
enabled: disabled
dpms: Off
modes:
edid-base64:
DRM.card0.HDMI.A.2:
status: disconnected
enabled: disabled
dpms: Off
modes:
edid-base64:
DRM.card0.HDMI.A.3:
status: disconnected
enabled: disabled
dpms: Off
modes:
edid-base64:
DRM.card0.LVDS.1:
status: connected
enabled: enabled
dpms: On
modes: 1366x768 1366x768
edid-base64: AP/////
DRM.card0.VGA.1:
status: disconnected
enabled: disabled
dpms: Off
modes:
edid-base64:
Date: Thu Apr 14 15:45:03 2011
DistUpgraded: Fresh install
DistroCodename: natty
DistroVariant: ubuntu
DkmsStatus:
bcmwl, 5.100.82.38+bdcom, 2.6.39-
bcmwl, 5.100.82.38+bdcom, 2.6.38-7-generic, i686: installed
bcmwl, 5.100.82.38+bdcom, 2.6.38-8-generic, i686: installed
GraphicsCard:
Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller [8086:0126] (rev 09) (prog-if 00 [VGA controller])
Subsystem: Dell Device [1028:0493]
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Beta i386 (20110330)
MachineType: Dell Inc. Latitude E6420
ProcEnviron:
LANGUAGE=en_US:en
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=
Renderer: Unknown
SourcePackage: xserver-
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 02/25/2011
dmi.bios.vendor: Dell Inc.
dmi.bios.version: X66
dmi.board.vendor: Dell Inc.
dmi.chassis.type: 9
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.
dmi.product.name: Latitude E6420
dmi.product.
dmi.sys.vendor: Dell Inc.
version.compiz: compiz 1:0.9.4+
version.libdrm2: libdrm2 2.4.23-1ubuntu6
version.
version.
version.
version.
version.
version.
version.