Public bug reported:
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
** Affects: xorg (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug has-workaround precise regression reproducible ubuntu
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which is subscribed to xorg in Ubuntu.
https://bugs.launchpad.net/bugs/914216
Title:
arrandale xorg very laggy when Intel vt-d is enabled
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/914216/+subscriptions
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