Bug#324717: debugging X crash that requires hardware reset

["Zack Weinberg" <zackw@panix.com>]

Michel Dänzer said:

>> > First of all, does disabling the DRI work around the problem?
>>
>> I'll try that, but as I have no reliable way to reproduce the problem, I
>> will only be able to provide a guess, and that only after several days.
>> GL wasn't ever in use at the time of the crashes, though.
>
> That doesn't matter too much; with DRI enabled, the X driver uses a
> completely different method (DMA ring buffer as opposed to direct
> register address) to send commands to the card.

I did not know that.  Fascinating.

I've now reinstalled xserver-xorg -5, disabled DRI in xorg.conf and in
/etc/modules, and rebooted the computer.  I will report in a couple days
whether or not there have been any crashes.  Should I also prevent hotplug
from loading the agpgart and ati_agp modules?

zw