https://bugs.freedesktop.org/show_bug.cgi?id=61182
--- Comment #18 from D. Hugh Redelmeier hugh@mimosa.com --- (Sorry for the previous uncompleted comment. I will continue.)
I'm hitting it in Gnome_shell (https://bugzilla.redhat.com/show_bug.cgi?id=924076).
I'm hitting it in Cinnamon (https://bugzilla.redhat.com/show_bug.cgi?id=926036)
I'm hitting it in KWin (https://bugs.kde.org/show_bug.cgi?id=315089)
In each case, I get a SIGBUS in __memset_sse2, called from r600 code. I'm not used to getting SIGBUSes since I migrated from the PDP-11 :-).
This makes me think that it is a radeon driver bug.
One KDE developer pointed in another direction. Since it is reported as an intel driver bug, I don't think that it is right, but it might be relevant: https://bugs.freedesktop.org/show_bug.cgi?id=58834
I think that I still have crash dumps for each of these. If something from them would be useful, ask soon before I recover the space. But I think that I can regenerate one all too quickly.