Bug#389007: [Xorg-driver-ati] Bug#389007: Regression: Radeon 9200 powers off Apple Cinema Display connected via DVI
On Thu, 2006-10-26 at 19:25 +0100, Roger Leigh wrote:
> Benjamin Herrenschmidt <benh@kernel.crashing.org> writes:
>
> >> I found a solution to the problem. Adding
> >>
> >> Option "PanelSize" "1680x1050"
> >> Option "MonitorLayout" "TMDS,NONE"
> >>
> >> made the display work correctly. IIRC this was needed with XOrg 6.9,
> >> but wasn't needed with 7.0 (because it was intelligent enough to
> >> autodetect correctly?). This seems to be a regression in 7.1.
> >>
> >> Both the PanelSize and MonitorLayout need to be exactly as above. If
> >> either is commented out, or I change MonitorLayout to just "TMDS", the
> >> monitor powers off.
> >>
> >>
> >> Just in case it's affecting anything, I'm adding
> >>
> >> append="video=radeonfb:1680x1050-32@60"
> >>
> >> in my yaboot.conf in order to get a fullscreen framebuffer.
> >
> > radeonfb shouldn't need that ...
> >
> > What if, instead, you use Option "ReverseDDC" "true" btw ? Same
> > symptoms ?
>
> Yes, the display just powers off on startup (this is with PanelSize
> and MonitorLayout commented out).
ANd with NoDDC ?
Ben.
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