Re: X "Hangs" with RS690 + 2.6.26

[Jonathan McDowell <noodles@earth.li>]

On Fri, Jul 25, 2008 at 11:10:07AM +0100, Dave Airlie wrote:
> > I've started to see "hangs" with X on an ATI RS690 with a 2.6.26 kernel.
> > The symptoms are that load average goes up, X stops accepting keypresses
> > or mouse clicks, but the cursor still moves around the screen in
> > response to the mouse being moved. I can't switch to a VT but can ssh in
> > remotely to see that things are still running. I don't seem to be able
> > to kill X but "shutdown -r now" cleanly reboots.
> > 
> > radeon driver is recent git - 1c5858484da4fb1c9bc3ac3b4d7a97863ab99730
> > but I've seen it with older revisions too.
> > 
> > It can take a couple of days for me to hit the problem, so a git bisect
> > could be a lengthy process. If anyone has any suggestions about faster
> > ways to track down the issue I'd like to hear them.
> 
> git log v2.6.25..v2.6.26 drivers/char/drm
... 
> not sure if you wanna try reverting some of those and seeing which is the 
> cause maybe..
 
I never figured out which of these caused the issues, but as a further
data point for anyone else suffering from the issue 2.6.27-rc kernels
appear to fix (or at least significantly ease) the problem; I managed a
23 day uptime on 2.6.27-rc5 with I think one X freeze during that period
that cleaned up after a Ctrl-Alt-Backspace. Not seen the same thing at
all on 2.6.27-rc7 (though only ran it for 14 days before rebooting into
2.6.27 proper).

J.

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