[Bug 49747] dpms on only works on DP0 on a hd5700

https://bugs.freedesktop.org/show_bug.cgi?id=49747

--- Comment #8 from Daniel Vetter daniel@ffwll.ch 2012-05-10 13:13:38 PDT --- I've played some more around with it, and the same problem happens when I switch off the screen and on again. I've noticed that vt-switching sometimes helps, but not always.

I've also tried to connect the screen with a dp->hdmi cable (well, mini-dp->dvi with a dvi->hdmi) and the same problem happens there.

One thing I've noticed though is that over hdmi the screen is much brighter, kind what I'd expect if the wrong color space is being used by the screen.