[Bug 544741] Re: [X700] KMS, amd64: Kernel panic while trying to launch system > preferences > appearance

[Torbjørn Sund]

After upgrading to Ubuntu 10.04 i386 my system freezes when changing
users. Had no problems with 9.10. Have applied all system updates.

System: Acer Travelmate 3222, 2GB, external display HP L1720 @1280x1024. Video ATI Radeon Mobility X700.
Symptoms: 
- 1. Sluggish display (could it be the change from nv to nouveau display driver?)
- 2. Consistently upon "Change user" the display goes blank except for cursor and sometimes noise in lower part. Possible to switch to login terminal and back (ctrl-alt-f1/f7), but only once, when repeated system freezes. 
Solution:
Reboot.

I will provide more information on request, but I am not a Linux expert.

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[X700] KMS, amd64: Kernel panic while trying to launch system > preferences > appearance
https://bugs.launchpad.net/bugs/544741
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