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[Bug 439476] [NEW] After switching from external to laptop screen, graphics are very slow

 

Public bug reported:

Binary package hint: xorg

I sometimes boot my laptop with the lid closed and a monitor plugged in.
X correctly identifies this setup and uses only the external monitor. If
I unplug the external monitor, and then open the laptop, the resolution
seems to be set correctly, but everything moves at about 0.2 fps. The
mouse moves fine, but the screen only redraws every few seconds. It
seems like everything is running fine... the effects work, music plays.
But the screen only updates itself every few seconds. Restarting compiz
did nothing. I have to log out and back in.

ProblemType: Bug
Architecture: amd64
Date: Wed Sep 30 11:46:04 2009
DistroRelease: Ubuntu 9.10
MachineType: Dell Inc. Inspiron 1525
NonfreeKernelModules: wl
Package: xserver-xorg 1:7.4+3ubuntu5
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.31-11-generic root=UUID=a3f86cb4-2db2-481a-a074-689adbdb0e87 ro quiet splash
ProcEnviron:
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-11.36-generic
RelatedPackageVersions:
 xserver-xorg 1:7.4+3ubuntu5
 libgl1-mesa-glx 7.6.0~git20090817.7c422387-0ubuntu6
 libdrm2 2.4.13-1ubuntu1
 xserver-xorg-video-intel 2:2.8.1-1ubuntu2
 xserver-xorg-video-ati N/A
SourcePackage: xorg
Uname: Linux 2.6.31-11-generic x86_64
XorgConf: Error: [Errno 2] No such file or directory: '/etc/X11/xorg.conf'
dmi.bios.date: 03/10/2008
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A11
dmi.board.name: 0U990C
dmi.board.vendor: Dell Inc.
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA11:bd03/10/2008:svnDellInc.:pnInspiron1525:pvr:rvnDellInc.:rn0U990C:rvr:cvnDellInc.:ct8:cvr:
dmi.product.name: Inspiron 1525
dmi.sys.vendor: Dell Inc.
fglrx: Not loaded
system:
 distro:             Ubuntu
 architecture:       x86_64kernel:             2.6.31-11-generic

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


** Tags: amd64 apport-bug

-- 
After switching from external to laptop screen, graphics are very slow
https://bugs.launchpad.net/bugs/439476
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