Dear Michel,

> On Mon, 2010-01-04 at 17:58 +0000, Richard Palmer wrote: 
> > 
> >     I have two Dell 20" monitors connected to a Mobility Radeon
> >     HD 3470 card using DisplayPort to DVI adaptor cables. I can happy
> >     use either monitor, but not both together. xrandr lets me
> >     switch between them, showing different parts of the virtual desktop
> >     (with compiz enabled), but I haven't found any way to get it to
> >     show both.
> 
> IME compiz doesn't handle dynamic RandR configuration changes well. Try
> without compiz or manually updating the compiz output configuration to
> match the RandR configuration.

Sorry, I should have said that this starts at login; both monitors
work in text mode (showing cloned output) but when gdm starts one
monitor goes into power saving mode. I start compiz after I've logged in,
so don't think it can be this causing the problem?. If I switch back to
the console from X both monitors are enabled again for text, switching back
to X turns one of them off again.

Any thoughts ?. It's rather frustrating as it all seems to be working in
parts, which makes me think it's just a question of configuration error
on my part rather than missing functionality from the driver.

thanks,

Richard


-- 
Richard Palmer                  | Centre for E-Research &
Systems Manager                 | Centre for Computing in the Humanities
[email protected]      | King's College London
Tel: 0207 848 1973 
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