I've found a solution for the ATI lockups...
Hopefully, you guys will be able to independently confirm it.
I've got a Dell with ATI M6 running edgy with xserver-xorg-video-ati
6.6.2-0ubuntu1. The stock xorg.conf causes fast frequent random lockups
at 24 bpp and somehow less frequent random lockups at 16bpp.
I don't know how, but inserting these lines (all or some of them) to the stock
xorg.conf solves the freezes (in Section Device):
Option DynamicClocks true
Option AccelMethod EXA
Option DMAForXv off
Option SubPixelOrder None
Option BusType AGP
My hunch tells me that the important line is either the DynamicClocks or
the AccelMethod.
Note: I have no idea of stability in 3D. But in 2D, it is quite stable
(uptime 2+ days now); and much faster than Option NoAccel or Driver
vesa.
Please try and spread the word.
beango
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[dapper] xrandr freezes the system (radeon, MergedFB)
https://launchpad.net/bugs/47775
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