Created attachment 77475 [PATCH] drm/i915: Resurrect ring kicking for semaphores, selectively
-- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xserver-xorg-video-intel in Ubuntu. 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: Incomplete 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. To manage notifications about this bug go to: https://bugs.launchpad.net/xserver-xorg-video-intel/+bug/1041790/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
