On Tue, 2010-02-23 at 09:25 -0800, Keith Packard wrote: > On Tue, 23 Feb 2010 15:02:40 +0100, Brice Goglin <[email protected]> > wrote: > > > See some debugging in > > http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=554450#31 > > > > Does this ring any bell ? > > yeah, this makes sense -- the compat_output has recently been redefined > to be the same as the 'primary' output, and that output may well be > turned off, in which case you'd get a crash looking for the crtc > attached to it. > > Fixing this will require reviewing all uses of compat_output and > ensuring that they check for a NULL crtc.
Unfortunately that doesn't seem to work well in all cases either, see http://bugs.freedesktop.org/show_bug.cgi?id=24532#c3 and following comments (though maybe the semantics for when there's no compat output/CRTC could be improved from that patch). I think the ideal solution would be to make sure the compat output always has a CRTC associated with it. Of course if that isn't always possible, something like the above is needed as a fallback anyway. But I think at least for scenarios like in the bug report above it should be possible. -- Earthling Michel Dänzer | http://www.vmware.com Libre software enthusiast | Debian, X and DRI developer _______________________________________________ xorg-devel mailing list [email protected] http://lists.x.org/mailman/listinfo/xorg-devel
