Xorg cpu utilization high on every other startup

[Lars Volker]

Every now and then, the system starts and Xorg occupies 100% of one of the two cores. This seems to happen randomly since the last upgrade. When i tried to strace the xorg process last time, the system instantly locked up.

ProblemType: Bug
Architecture: amd64
Date: Fri Oct 2 08:48:31 2009
DistroRelease: Ubuntu 9.10
ExecutablePath: /usr/bin/Xorg
MachineType: LENOVO 276521G
NonfreeKernelModules: fglrx
Package: xserver-xorg-core 2:1.6.3-1ubuntu7
PccardctlIdent:
 Socket 0:
   no product info available
PccardctlStatus:
 Socket 0:
   no card
ProcCmdLine: BOOT_IMAGE=/vmlinuz-2.6.31-11-generic root=/dev/mapper/vg0-root ro noquiet nosplash
ProcEnviron:
 LANG=de_DE.UTF-8
 PATH=(custom, no user)
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 1:6.12.99+git20090825.fc74e119-0ubuntu2
SourcePackage: xorg-server
Uname: Linux 2.6.31-11-generic x86_64
dmi.bios.date: 05/15/2009
dmi.bios.vendor: LENOVO
dmi.bios.version: 7UET71WW (3.01 )
dmi.board.name: 276521G
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:bvr7UET71WW(3.01):bd05/15/2009:svnLENOVO:pn276521G:pvrThinkPadT400:rvnLENOVO:rn276521G:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 276521G
dmi.product.version: ThinkPad T400
dmi.sys.vendor: LENOVO
system:
 distro: Ubuntu
 architecture: x86_64kernel: 2.6.31-11-generic

[Pauli Virtanen (pauli-virtanen)]

Same as this? https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/439138

[Lars Volker (lv)]

I don't think so.
* My system doesn't have a SSD
* X was not strace-able, when I tried, the system froze.
* The system has an Intel graphics adapter as well, but it is not used.
* It happens, when using latest fglrx. As soon as I realized that, I switched to (non 3D-accelerated :( ) radeon driver, which seems to "fix" the issue.

[Lars Volker (lv)]

Right now it happend without fglrx while using the radeon driver.