Comment 34 for bug 371279

(In reply to comment #14)
> (In reply to comment #13)
> > (In reply to comment #11)
> > > (In reply to comment #10)
> > > > With these extra coordinate checks the crash no longer occours here.
> > >
> > > So far, so good. Can you set a gdb breakpoint on the RADEONUploadToScreenCP()
> > > line that returns FALSE after these new checks, and attach a backtrace from
> > > when it triggers?
> > >
> >
> > I succeeded in attaching gdb to the Xorg process and setting the required
> > breakpoint. I did this from a VT. Then I told gdb to continue execution (with c
> > command), but when switching back to Xorg all I get is a black screen (had to
> > reboot).
> >
>
> I'll have a look at this:
> http://www.x.org/wiki/Development/Documentation/ServerDebugging
> ...
>

Perhaps this will do it for me:
handle SIGUSR1 nostop

Apparently gdb halts things on VT switch. I don't have the possibility of logging in via ssh where I'm currently at.