** Changed in: xserver-xorg-video-intel (Ubuntu)
Status: Invalid => New
** Changed in: xserver-xorg-video-intel (Ubuntu)
Status: New => Incomplete
** Changed in: xserver-xorg-video-intel (Ubuntu)
Status: Incomplete => Opinion
** Changed in: xserver-xorg-video-intel (Ubuntu)
Status: Opinion => Invalid
** Changed in: xserver-xorg-video-intel (Ubuntu)
Status: Invalid => Confirmed
** Changed in: xserver-xorg-video-intel (Ubuntu)
Status: Confirmed => In Progress
** Changed in: xserver-xorg-video-intel (Ubuntu)
Status: In Progress => Fix Committed
** Changed in: xserver-xorg-video-intel (Ubuntu)
Status: Fix Committed => Fix Released
--
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https://bugs.launchpad.net/bugs/761065
Title:
[Sandybridge] Spurious "*ERROR* Hangcheck timer elapsed... blt ring
idle" messages in dmesg when using compiz
Status in The Linux Kernel:
Fix Released
Status in “linux” package in Ubuntu:
Fix Released
Status in “xserver-xorg-video-intel” package in Ubuntu:
Fix Released
Status in “linux” source package in Natty:
Fix Released
Status in “xserver-xorg-video-intel” source package in Natty:
Invalid
Bug description:
SRU Justification:
Fixes a constant stream of hangcheck errors flooding dmesg, and
removes the visible stuttering that was caused by it when using 3D
applications.
Impact:
Fixes missed interrupts on sandybridge GPU's. It doesn't affect any
other GPU generation.
Fix:
Upstream commit 498e720b96379d8ee9c294950a01534a73defcf3.
Testcase:
1) Install mesa-utils on a system using sandybridge graphics on 11.04
2) run vblank_mode=0 glxgears and let it run for 30 seconds or so
3) kill it then check dmesg
4) Without fix: hangcheck messages every ~5 seconds, massive
stuttering of the whole desktop observed. With fix: no hangcheck
messages, able to continue using the desktop.
This was sent to stable, but 2.6.38.y stable is dead so it will need
to be manually cherry-picked. It has been tested extensively locally
as well as by users on the bug whom I provided test kernels for. It
applies cleanly to ubuntu-natty.git.
Original bug:
-------------
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
DistroRelease: Ubuntu 11.04
Package: xserver-xorg-video-intel 2:2.14.0-4ubuntu7
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic i686
NonfreeKernelModules: wl
Architecture: i386
CompizPlugins:
[core,bailer,detection,composite,opengl,decor,mousepoll,vpswitch,regex,animation,snap,expo,move,compiztoolbox,place,grid,imgpng,gnomecompat,wall,ezoom,workarounds,staticswitcher,resize,fade,unitymtgrabhandles,scale,session,unityshell]
CompositorRunning: compiz
CurrentDmesg:
[ 20.310859] [drm:i915_hangcheck_ring_idle] *ERROR* Hangcheck timer
elapsed... blt ring idle [waiting on 9004, at 9004], missed IRQ?
[ 32.279371] [drm:i915_hangcheck_ring_idle] *ERROR* Hangcheck timer
elapsed... blt ring idle [waiting on 13936, at 13936], missed IRQ?
[ 141.319196] exe (1718): /proc/1718/oom_adj is deprecated, please use
/proc/1718/oom_score_adj instead.
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///////wAw5OsCAAAAAAAUAQSQHxF4Cp7lnV9XnCYaUFQAAAABAQEBAQEBAQEBAQEBAQEBWBtWflAADjAkMDUANa4QAAAZPhJWflAADjAkMDUANa4QAAAZAAAA/gBLSjI2MhQxNDBXSDQKAAAAAAAAQTGUAAAAAAEBCiAgAI4=
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, 2.6.39-020639rc3-generic, i686: installed
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=/boot/vmlinuz-2.6.38-8-generic
root=UUID=4eac9a69-2bfe-4b4b-b469-5e6f7a89e0f1 ro quiet splash vt.handoff=7
Renderer: Unknown
SourcePackage: xserver-xorg-video-intel
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.:bvrX66:bd02/25/2011:svnDellInc.:pnLatitudeE6420:pvr01:rvnDellInc.:rn:rvr:cvnDellInc.:ct9:cvr:
dmi.product.name: Latitude E6420
dmi.product.version: 01
dmi.sys.vendor: Dell Inc.
version.compiz: compiz 1:0.9.4+bzr20110411-0ubuntu1
version.libdrm2: libdrm2 2.4.23-1ubuntu6
version.libgl1-mesa-dri: libgl1-mesa-dri 7.10.2-0ubuntu1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 7.10.2-0ubuntu1
version.xserver-xorg: xserver-xorg 1:7.6+4ubuntu3
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.0-0ubuntu4
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.14.0-4ubuntu7
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau
1:0.0.16+git20110107+b795ca6e-0ubuntu7
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