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Re: Fixing R300 hangs


With the patches required to prevent the hangs, is DRI working fine for

As I previously reported (cf. DRI permission problem in this list), I'm
getting "Operation not permitted" when trying to use DRI and libGL
reverts back to (slow) indirect rendering with my ATI FireGL X1 (9700
chipset, r300 driver).



> Mike A. Harris wrote:
> > Doing a bit of investigation has shown that it isn't just the
> > r300 DRI driver that is instable, but even just loading the X server
> > DRI module with many r300 or newer cards causes the system to crash,
> > even if DRI is actually disabled, and even if the r300 DRI driver is
> > not even present on the system.
> I believe that this is almost surely this problem:
> http://lists.freedesktop.org/archives/xorg/2005-December/011678.html
> https://bugs.freedesktop.org/show_bug.cgi?id=4847
> http://webcvs.freedesktop.org/xorg/driver/xf86-video-ati/ChangeLog?rev=1.22&view=markup
> There are some important memory map and other fixes for Radeon cards
> (especially R300 and above) that hit the xorg CVS tree on February
> 17, after 7.0.  (The author considered them a little too experimental
> for 7.0.)  Apparently without the fixes many people saw lockups using 
> R300 cards without DRI enabled or the r300 DRI drive present.  However,
> with these fixes the instability goes away.
> Perhaps these upstream CVS patches could be integrated into the Fedora
> Core patches.  If so, the r300 driver could be left in FC5.  Of course,
> we are running low on time, but I think it's a relatively critical bug.
> Especially if the recent Mesa change doesn't solve the crashes for
> everyone.
> John Thacker
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