Bug#503664: xserver-xorg-core: Dual head with Radeon HD3200 - heads partly overlay each other
> I'm unable to make work an external monitor with experimental radeon
> driver. I tried ModeLine + PreferredMode without luck. I tried the
> following from the command line:
> elacunza@elacunza:~$ xrandr --auto
> xrandr: cannot find crtc for output VGA-0
> elacunza@elacunza:~$ xrandr --output VGA-0 --mode "1440x900"
> xrandr: cannot find crtc for output VGA-0
>
> Monitor is conected, believe me! :)
>
That's because the driver reports a "None" output (see the middle of
xrandr output). "None" is probably using one CRTC, and LVDS the other
one, so VGA cannot find an available CRTC (the board only has 2
rendering pipelines). Try "xrandr --output None --off" first (or disable
"None" in xorg.conf using the wiki page).
> Shall I test Virtual 3000 1600 with Xserver 1.4 as a last test?
>
Might be good. But if you're bored with upgrading/downgrading 15
packages, I'll understand :)
> - experimental radeon problems with external monitor
>
See above. The problem is probably the "None" output. Maybe it's a
modern output that the driver doesn't detect properly yet? HDMI?
DisplayPort?
You might want to open an upstream bug about this "None" output.
http://bugzilla.freedesktop.org product Xorg component Driver/Radeon.
Put your xorg.conf and log there, as well as the xrandr output. Don't
bother talking about Xserver1.4 from testing/unstable, they won't care,
only experimental matters here.
> - experimental radeonhd not auto-adding to layout mouse and keyboard sections
>
I don't see how radeonhd could impact input device like this. You should
send the corresponding log, and somebody might understand what's going
on. Julien isn't available these days, so it might take some time...
Brice
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