On Tue, 2007-02-06 at 15:20 +0100, Michel Dänzer wrote: > On Tue, 2007-02-06 at 17:00 +1100, Benjamin Herrenschmidt wrote: > > > > > > There seems to be a race condition somewhere which sometimes causes this > > > when setting a video mode. I can usually get back the correct display by > > > forcing a mode set, e.g. by switching between console and X. > > > > The problem seems to be due to the panel powerup sequence. It looks like > > you need to do a well timed sequence of events when toggling the various > > LVDS related control bits for the panel to come reliably up. However, > > from trial & error, I've never been able to come up with a sequence that > > works perfectly for everybody. I suspect differnent panel models require > > different sequences. > > Maybe this could be improved in radeonfb though, given that it doesn't > seem to happen (or at least much less frequently) with the X radeon > driver without UseFBDev?
Happens for me with it every now and then too. Ben. -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
