Hello, we expierenced the same issue on a Nexcom NISE 3500M2E industrial computer (http://www.nexcom.com/Products/industrial-computing-solutions /fanless-computer/high-performance-platform/fanless-computer-nise- 3500m2e) running kubuntu 12.04
We observed a lot of EDID activity in the Xorg log when the system lags. With kernel 3.2.0-29-generic-pae i686 i386 this happens some seconds after the UI came up. With the kernel options i915.i915_enable_rc6=0 i915.i915_enable_fbc=0 i915.semaphores=1 i915.modeset=1 the system works stable until we are using a bt878 based framegrabber hardware with direct overlay (XVideo). XVideo is necessary to keep the latency short (its in a robitic application, the system is behind the operator's console). As a current work around, we are using Kernel 3.5.3 from http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.5.3-quantal/. the system is far more stable but the lags still happen from time to time. This seems to be in conjunction with i2c bugs fixed in the i915 kernel driver. Regards Florian -- 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/914216 Title: [arrandale] xorg very laggy when Intel vt-d is enabled Status in “xserver-xorg-video-intel” package in Ubuntu: Triaged Bug description: I have a thinkpad x201 with intel graphics. I experienced intermittent but frequent multi-second lags in X input, both keys and mouse on precise, using both the standard xorg and also the current one from the x-staging ppa. With help from raof, I discovered that turning off vt-d in the bios fixed the problem. So it seems like there is a bug in X to do with handling vt-d. ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: xserver-xorg 1:7.6+7ubuntu7 ProcVersionSignature: Ubuntu 3.2.0-8.14-generic 3.2.0 Uname: Linux 3.2.0-8-generic x86_64 .tmp.unity.support.test.0: ApportVersion: 1.90-0ubuntu1 Architecture: amd64 CompizPlugins: [core,bailer,detection,composite,opengl,compiztoolbox,decor,gnomecompat,mousepoll,imgpng,place,regex,session,unitymtgrabhandles,resize,vpswitch,animation,grid,move,snap,wall,expo,workarounds,ezoom,fade,scale,unityshell] CompositorRunning: None Date: Tue Jan 10 12:20:26 2012 DistUpgraded: Log time: 2011-12-15 10:06:44.057094 DistroCodename: precise DistroVariant: ubuntu EcryptfsInUse: Yes ExtraDebuggingInterest: Yes, whatever it takes to get this fixed in Ubuntu GraphicsCard: Intel Corporation Core Processor Integrated Graphics Controller [8086:0046] (rev 02) (prog-if 00 [VGA controller]) Subsystem: Lenovo Device [17aa:215a] InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007) MachineType: LENOVO 3249CTO ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-8-generic root=UUID=8aff985d-377a-420d-a38e-62ce8bd54504 ro crashkernel=384M-2G:64M,2G-:128M quiet splash vt.handoff=7 SourcePackage: xorg UpgradeStatus: Upgraded to precise on 2011-12-15 (26 days ago) dmi.bios.date: 05/31/2011 dmi.bios.vendor: LENOVO dmi.bios.version: 6QET66WW (1.36 ) dmi.board.name: 3249CTO 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:bvr6QET66WW(1.36):bd05/31/2011:svnLENOVO:pn3249CTO:pvrThinkPadX201:rvnLENOVO:rn3249CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.name: 3249CTO dmi.product.version: ThinkPad X201 dmi.sys.vendor: LENOVO version.compiz: compiz 1:0.9.6+bzr20110929-0ubuntu8 version.ia32-libs: ia32-libs 20090808ubuntu32 version.libdrm2: libdrm2 2.4.29-1ubuntu1 version.libgl1-mesa-dri: libgl1-mesa-dri 7.11-0ubuntu4 version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx 7.11-0ubuntu4 version.xserver-xorg-core: xserver-xorg-core 2:1.11.3-0ubuntu1 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.6.0-2ubuntu1~whot1build1 version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.99~git20111219.aacbd629-0ubuntu1 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.17.0-1ubuntu1 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/xserver-xorg-video-intel/+bug/914216/+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
