https://bugs.freedesktop.org/show_bug.cgi?id=49747
--- Comment #17 from Daniel Vetter daniel@ffwll.ch 2012-05-10 13:58:04 PDT --- Created attachment 61405 --> https://bugs.freedesktop.org/attachment.cgi?id=61405 radeonregs dump after boot, DP1 broken
Somehow dpms off/on doesn't break things right now (I've only managed to once create a strangely torn-in-half screen, never black and otherwise it just worked). So I've fallen back to the always reliable switch-screen-off-and-on and then forced a mode set with xrandr --off/--auto (which did not help).