https://bugs.freedesktop.org/show_bug.cgi?id=41668
--- Comment #22 from Alex Deucher agd5f@yahoo.com 2012-02-13 06:20:04 PST --- (In reply to comment #21)
Alex I think this is a driver or hw bug actually.
I seem to lose MSI rearms here, if I manually poke a rearm in from userspace over ssh the system recovers fine.
not sure if we should disable MSI on rv515, you might be able to find some info internally.
I'll see what I can find, but r5xx is pretty old. Did reading back the rearm reg help?