Okay, I showed bug 195051 to Alex and chatted with him a bit.

A lot of -ati's internals were written prior to having access to
register documentation, so there's a lot of educated guesses in -ati
that proved to be wrong once the docs were in hand, and lead to random
crashes like this, and Alex believes this is the case with this bug.  He
did not have a workaround to suggest, and confirmed Travis' finding that
the issue is not going to be limited to a specific chipset so pci id
checks wouldn't be a reliable workaround.  He has plans to go through
and fix up all these mappings correctly, within the next 3-6 months.
Unfortunately that rules out a 8.04.1 fix (and even if it could be
achieved in that timeframe, the size of the rework would probably be
beyond our bug-risk threshhold.)

Meanwhile, I'll make sure alex remains aware of the bug, and try to
improve the reports upstream so it will be fixed for Intrepid.  The work
can be tracked at bug 195051 here, and at
http://bugs.freedesktop.org/show_bug.cgi?id=15096 upstream (unless
someone knows of a more appropriate upstream bug?)  So, I'm resetting
this to WONTFIX.


** Changed in: compiz (Ubuntu)
       Status: In Progress => Won't Fix

-- 
[regression] need to whitelist multiple ATI cards, or remove blacklisting
https://bugs.launchpad.net/bugs/201330
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