radeon: incorrect crtc for external LCD on VGA-0

[Alex Deucher]

On Dec 7, 2007 2:18 AM, Otto Solares <solca at guug.org> wrote:
> Hi!
>
> Video card on x86 laptop:
>
> ATI Technologies Inc Radeon R250 [Mobility FireGL 9000] (rev 02)
>
> I used to have an old external CRT monitor attached to the VGA-0
> connector and the command `xrand --output LVDS --off` would
> correctly turn off the laptop's LCD so I can work in the external
> without having both monitors powered-on.
>
> Problem now is that I buy a new external LCD monitor and the
> above command would turn off both the new LCD and the laptop's
> LCD.
>
> But when `xrandr --output VGA-0 --crtc 0` everything works as
> expected so I pressume is a bug in the crtc detection when a
> LCD is attached in the VGA-0 connector both monitors are driven
> by the same crtc.  As I said, plugging the CRT monitor doesn't
> exhibit this problem.
>
> Running latest Debian Sid (X Server 1.4.0) and git radeon driver.

Did you/debian also upgrade the xrandr utility to the latest version
in git as well?

Alex