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[Andreas <776198@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

Binary package hint: xorg

this is a two graphic cards, three monitors setup. I've been using this now for many years with ubuntu. 
After the update to ubuntu 11.04 the entire GUI experience is extremely slow and lags. This behaviour even occurs with the 'ubuntu standard no effects' desktop session! very annoying.
If I drag a round a gedit window for example, the xorg process (as visible in 'top') will use up to 99% of my CPU power.
Anyway, since the standard desktop was just working fine with the previous ubuntu versions, I would expect the latest one to work just fine too.

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: xorg 1:7.6+4ubuntu3
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic x86_64
NonfreeKernelModules: nvidia
.proc.driver.nvidia.gpus.0: Error: [Errno 21] Is a directory: '/proc/driver/nvidia/gpus/0'
.proc.driver.nvidia.gpus.1: Error: [Errno 21] Is a directory: '/proc/driver/nvidia/gpus/1'
.proc.driver.nvidia.registry: Binary: ""
.proc.driver.nvidia.version:
 NVRM version: NVIDIA UNIX x86_64 Kernel Module  270.41.06  Mon Apr 18 14:53:56 PDT 2011
 GCC version:  gcc version 4.5.2 (Ubuntu/Linaro 4.5.2-8ubuntu4)
Architecture: amd64
CompizPlugins: [core,bailer,detection,composite,opengl,decor,mousepoll,vpswitch,regex,animation,snap,expo,move,compiztoolbox,place,grid,imgpng,gnomecompat,wall,ezoom,workarounds,staticswitcher,resize,fade,unitymtgrabhandles,scale,session,unityshell]
CompositorRunning: None
Date: Tue May  3 10:20:49 2011
DistUpgraded: Log time: 2011-04-28 15:08:14.568103
DistroCodename: natty
DistroVariant: ubuntu
DkmsStatus:
 nvidia-current, 270.41.06, 2.6.38-8-generic, x86_64: installed 
 vboxhost, 4.0.6, 2.6.38-8-generic, x86_64: installed
EcryptfsInUse: Yes
GraphicsCard:
 nVidia Corporation G96 [GeForce 9500 GT] [10de:0640] (rev a1) (prog-if 00 [VGA controller])
   Subsystem: eVga.com. Corp. Device [3842:c954]
 nVidia Corporation NV44A [GeForce 6200] [10de:0221] (rev a1) (prog-if 00 [VGA controller])
   Subsystem: ZOTAC International (MCO) Ltd. Device [19da:3036]
JockeyStatus:
 xorg:nvidia_173 - NVIDIA accelerated graphics driver (Proprietary, Disabled, Not in use)
 xorg:nvidia_current - NVIDIA accelerated graphics driver (Proprietary, Enabled, Not in use)
MachineType: Dell Inc. OptiPlex 960
ProcEnviron:
 LANGUAGE=en_US:en
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-2.6.38-8-generic root=UUID=27600731-8251-4ac4-8ddf-a33d5d9f3f9a ro quiet splash vt.handoff=7
Renderer: Unknown
SourcePackage: xorg
Symptom: display
UpgradeStatus: Upgraded to natty on 2011-04-28 (4 days ago)
dmi.bios.date: 04/29/2009
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A04
dmi.board.name: 0Y958C
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 6
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA04:bd04/29/2009:svnDellInc.:pnOptiPlex960:pvr:rvnDellInc.:rn0Y958C:rvrA00:cvnDellInc.:ct6:cvr:
dmi.product.name: OptiPlex 960
dmi.sys.vendor: Dell Inc.
version.compiz: compiz 1:0.9.4+bzr20110415-0ubuntu2
version.ia32-libs: ia32-libs 20090808ubuntu13
version.libdrm2: libdrm2 2.4.23-1ubuntu6
version.libgl1-mesa-dri: libgl1-mesa-dri 7.10.2-0ubuntu2
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 7.10.2-0ubuntu2
version.nvidia-graphics-drivers: nvidia-graphics-drivers N/A
version.xserver-xorg: xserver-xorg 1:7.6+4ubuntu3
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.0-0ubuntu4
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.14.0-4ubuntu7.1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110107+b795ca6e-0ubuntu7

** Affects: xorg (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug natty performance possible-manual-nvidia-install regression-update ubuntu unity-2d

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https://bugs.launchpad.net/bugs/776198

Title:
  xorg and nvidia give very bad performance on multi display setup after
  update to ubuntu 11.04