Further testing has proved some of my earlier statements incorrect. I
apologize for my stupidity, but here is more correct information:

On older kernels, no ForcePCIMode option is needed to prevent CCE restart.
Still, when running without this option, GL apps do crash after a while, though 
not nearly as soon. Interestingly, using up more CPU power by playing music at 
the same time, etc. seems to make it crash sooner.

With ForcePCIMode, the same problems occur (though the older stuff
almost seemed to work, it still crashed, though with more effort.)

None of the patches previously listed  seem to help.

-- 
R128 DRI lockup on PPC
https://bugs.launchpad.net/bugs/38949
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