** Description changed: + 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. + [ 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: + status: disconnected + enabled: disabled + dpms: Off + modes: + edid-base64: DRM.card0.DP.2: - status: disconnected - enabled: disabled - dpms: Off - modes: - edid-base64: + status: disconnected + enabled: disabled + dpms: Off + modes: + edid-base64: DRM.card0.DP.3: - status: disconnected - enabled: disabled - dpms: Off - modes: - edid-base64: + status: disconnected + enabled: disabled + dpms: Off + modes: + edid-base64: DRM.card0.HDMI.A.1: - status: disconnected - enabled: disabled - dpms: Off - modes: - edid-base64: + status: disconnected + enabled: disabled + dpms: Off + modes: + edid-base64: DRM.card0.HDMI.A.2: - status: disconnected - enabled: disabled - dpms: Off - modes: - edid-base64: + status: disconnected + enabled: disabled + dpms: Off + modes: + edid-base64: DRM.card0.HDMI.A.3: - status: disconnected - enabled: disabled - dpms: Off - modes: - edid-base64: + 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= + 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: + 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 + 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] + 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 + 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
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/761065 Title: [Sandybridge] Spurious "*ERROR* Hangcheck timer elapsed... blt ring idle" messages in dmesg when using compiz To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/761065/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
