DRI problems with ati/radeon on stable/7 r203425

[David Wolfskill]

On Mon, Feb 08, 2010 at 11:29:44AM -0700, Warren Block wrote:
> ...
> >And the xdm login banner finally showed up; I'd estimate that was around
> >20 minutes of idle time before that happened.
> 
> Does it behave differently if you disable xdm in /etc/ttys and manually 
> startx?

OK; I tried disabling xdm & starting X via xinit, at which point I
received a reminder that I had didn't have permission to move the X.org
log files around in /var/log.  I could pursue that further if it's
really wanted, but the suggestion below appears to have had a more
dramatic effect....

> Oh, and you should probably have Option "AccelMethod" "EXA" in the 
> driver section of xorg.conf.

Ok; I hadn't uncommented any of the "acceleration" lines in the file --
I tend to leave things at default values unless I have a known reason to
change them (or I'm too bored, which doesn't happen often).  :-}

Merely explicitly disabling the "NoAccel" option(!) appears to have had
no particular effect -- I was able to get a locakup (or extremem
slowdown) with it.

Doing that in conjunction with specifying EXA as the AccelMethod does
appear to avoid the problem -- I tried at least a dozen times, and
there's been no failure.  On the other hand, animated displays sometimes
"glitch" rather more often with EXA than with teh default (XAA).

Thats'a bit surprising to me, as the laptop in question isn't especially
recent -- most of it dates from a few years ago.  (It's a Latitude C840
chassis with a few parts from earlier Inspiron 8200s, and a few that
were parts purchased for it.)

Thanks.

Peace,
david
-- 
David H. Wolfskill				david at catwhisker.org
Depriving a girl or boy of an opportunity for education is evil.

See http://www.catwhisker.org/~david/publickey.gpg for my public key.
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