https://bugs.freedesktop.org/show_bug.cgi?id=102322
--- Comment #22 from Andrey Grodzovsky andrey.grodzovsky@amd.com --- (In reply to dwagner from comment #21)
(I meant to write "I guess those register values are NOT retained over a reboot, right?")
Yes, my assumption was that at least some times you still have SSH access to the system in those cases.