Thanks Chris Cheney! The events hasn't come for a long time. http://git.kernel.org/?p=linux/kernel/git/stable/linux- stable.git;a=commit;h=e58f637bb96d5a0ae0919b9998b891d1ba7e47c9
"Polling for a VGA device on an old system can be quite expensive, causing latencies on the order of 600ms. As we hold the mode mutex for this time and also need the same mutex to move the cursor, we trigger a user-visible stall." Old system? "The real solution would involve improving the granulatity of the locking and so perhaps performing some of the probing not under the lock or some other updates can be done under different locks. Also reducing the cost of probing for a non-existent monitor would be worthwhile. However, exposing a parameter to disable polling is a simple workaround in the meantime." Why not default at least? "This is coupled to the user calling xrandr"(not automatically when polling is disapled) "since the information on the connection has just been updated."(from the newly connected screen) -- 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/957298 Title: Mouse is very slow after starting a session on Precise Status in “linux” package in Ubuntu: Confirmed Status in “xserver-xorg-video-intel” package in Ubuntu: Confirmed Bug description: I made a fresh install of Precise on a Lenovo X200 a couple weeks ago. When I start a new session after booting, the mouse is very slow and it feels like something might be taking up lots of resources on the system. After a few minutes, the problem goes away and the mouse works perfectly. ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: xorg 1:7.6+10ubuntu1 ProcVersionSignature: Ubuntu 3.2.0-18.29-generic 3.2.9 Uname: Linux 3.2.0-18-generic x86_64 .tmp.unity.support.test.0: ApportVersion: 1.94.1-0ubuntu2 Architecture: amd64 CompizPlugins: [core,composite,opengl,compiztoolbox,decor,vpswitch,snap,mousepoll,resize,place,move,wall,grid,regex,imgpng,session,gnomecompat,animation,fade,unitymtgrabhandles,workarounds,scale,expo,ezoom,unityshell] CompositorRunning: compiz Date: Fri Mar 16 14:18:31 2012 DistUpgraded: Fresh install DistroCodename: precise DistroVariant: ubuntu ExtraDebuggingInterest: Yes, whatever it takes to get this fixed in Ubuntu GraphicsCard: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller [8086:2a42] (rev 07) (prog-if 00 [VGA controller]) Subsystem: Lenovo Device [17aa:20e4] Subsystem: Lenovo Device [17aa:20e4] InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha amd64 (20120311) MachineType: LENOVO 7454CTO ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-18-generic root=UUID=4c5d6a2c-fe6d-4c6b-93a7-ce5ee444c8a9 ro elevator=noop quiet splash vt.handoff=7 SourcePackage: xorg UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 03/17/2009 dmi.bios.vendor: LENOVO dmi.bios.version: 6DET42WW (2.06 ) dmi.board.name: 7454CTO dmi.board.vendor: LENOVO dmi.board.version: Not Available dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Not Available dmi.modalias: dmi:bvnLENOVO:bvr6DET42WW(2.06):bd03/17/2009:svnLENOVO:pn7454CTO:pvrThinkPadX200:rvnLENOVO:rn7454CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.name: 7454CTO dmi.product.version: ThinkPad X200 dmi.sys.vendor: LENOVO version.compiz: compiz 1:0.9.7.0+bzr3035-0ubuntu1 version.ia32-libs: ia32-libs N/A version.libdrm2: libdrm2 2.4.30-1ubuntu1 version.libgl1-mesa-dri: libgl1-mesa-dri 8.0.1-0ubuntu4 version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx 8.0.1-0ubuntu4 version.xserver-xorg-core: xserver-xorg-core 2:1.11.4-0ubuntu6 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.0-0ubuntu1 version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.99~git20111219.aacbd629-0ubuntu2 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.17.0-1ubuntu4 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20111201+b5534a1-1build2 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/957298/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
