[R300 and other radeons] MergedFB lockups

[Benjamin Herrenschmidt]

On Sat, 2005-02-19 at 23:25 -0500, Vladimir Dergachev wrote:
> >> get an immediate lockup in gl-117 when moving the mouse. If I use
> >> current DRM with an older Mesa it locks up after about a minute of mouse
> >> movement.
> >
> > rv250 here, CVS HEAD X.org, Meas CVS Head DRI driver, current bk kernel
> > (well, actually, all of the above are about 5 days old, doesn't have
> > Vladimir latest fixes), I get very jerky display with g117 and broken
> > textures, ultimately it locks up after moving the mouse a little bit (at
> > the meny screen).
> 
> Is it a hard lockup ? With R300 it segfaults when I move a mouse due to 
> vertex arrays code not written yet, however it is strange this happens 
> only after a mouse movement.
> 
> It could be that it tramples over some Mesa driver memory (or there is a 
> bug in Mesa driver/library).

Well, difficult to say, I didn't manage to get back to X, but I managed
to kill X and radeonfb managed to restore the display, at which point I
could re-launch X...
>                            best
> 
>                               Vladimir Dergachev
> 
> >
> > I can kill X tho, that works, so the chip/bus isn't totally dead (or it
> > recovers with an engine reset).
> >
> > Ben.
> >
> >
-- 
Benjamin Herrenschmidt <benh at kernel.crashing.org>