** Description changed: You might expect that with "Sync To VBlank" enabled in compiz that video tearing doesn't happen. But it does, just less often. This appears to be a regression in Ubuntu 11.10, because in 11.04 "Sync to VBlank" was working reliably and eliminated tearing. Strangely, disabling just the Unity plugin in CCSM solves the problem and all tearing goes away. This seems to be related to bug 861061 where the Unity plugin also degrades application frame rates. Both issues are instantly solved by disabling just the Unity plugin. WORKAROUND: In CCSM, Workarounds, enable "Force full screen redraw (buffer swap) on repaint". + + With some graphics drivers like the NVIDIA proprietary one, this + workaround may introduce stuttering and halve the framerate you see. + That is expected with some drivers and is fixed by the same compiz fix + that is proposed for this bug. + ProblemType: Bug DistroRelease: Ubuntu 11.10 Package: compiz 1:0.9.6+bzr20110929-0ubuntu5 ProcVersionSignature: Ubuntu 3.0.0-12.20-generic 3.0.4 Uname: Linux 3.0.0-12-generic x86_64 .tmp.unity.support.test.0: ApportVersion: 1.23-0ubuntu3 Architecture: amd64 CompizPlugins: [core,bailer,detection,composite,opengl,compiztoolbox,decor,mousepoll,place,gnomecompat,resize,imgpng,move,wall,regex,grid,vpswitch,animation,session,resizeinfo,unitymtgrabhandles,expo,workarounds,fade,scale,ezoom,unityshell] CompositorRunning: compiz Date: Mon Oct 24 16:01:07 2011 DistUpgraded: Fresh install DistroCodename: oneiric DistroVariant: ubuntu GraphicsCard: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller [8086:0102] (rev 09) (prog-if 00 [VGA controller]) Subsystem: Dell Device [1028:047e] InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012) MachineType: Dell Inc. OptiPlex 990 PackageArchitecture: all ProcEnviron: LANGUAGE=en_AU:en PATH=(custom, no user) LANG=en_AU.UTF-8 SHELL=/bin/bash ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-12-generic root=UUID=c9a0c042-2d94-4c4b-bb7f-756faf723ada ro quiet splash intel_iommu=on vt.handoff=7 SourcePackage: compiz UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 05/28/2011 dmi.bios.vendor: Dell Inc. dmi.bios.version: A05 dmi.board.name: 0D6H9T dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 15 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvrA05:bd05/28/2011:svnDellInc.:pnOptiPlex990:pvr01:rvnDellInc.:rn0D6H9T:rvrA00:cvnDellInc.:ct15:cvr: dmi.product.name: OptiPlex 990 dmi.product.version: 01 dmi.sys.vendor: Dell Inc. version.compiz: compiz 1:0.9.6+bzr20110929-0ubuntu5 version.ia32-libs: ia32-libs N/A version.libdrm2: libdrm2 2.4.26-1ubuntu1 version.libgl1-mesa-dri: libgl1-mesa-dri 7.11-0ubuntu3 version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx 7.11-0ubuntu3 version.xserver-xorg: xserver-xorg 1:7.6+7ubuntu7 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.6.0-1ubuntu13 version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.99~git20110811.g93fc084-0ubuntu1 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.15.901-1ubuntu2 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110411+8378443-1
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/880707 Title: [regression] Visible tearing occurs even when "Sync To VBlank" is enabled, but only when Unity is active. To manage notifications about this bug go to: https://bugs.launchpad.net/compiz-core/+bug/880707/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
