https://bugs.freedesktop.org/show_bug.cgi?id=66963
--- Comment #154 from Shawn Starr shawn.starr@rogers.com --- With the people getting hangs and GPU resets, with DPM on: are you using KDE or GNOME?
I've noticed problems with KDE and the rv6xx and sometimes doing a soft power cycle of laptop will result in the display hanging when it attempts to set up kernel mode setting (KMS).