Bug#497209: xserver-xorg-video-radeon: Strange behaviour using dvi-port only with Radeon 9200 pro

[Brice Goglin]

Felix Schueller wrote:
> Package: xserver-xorg-video-radeon
> Version: 1:6.9.0-1+lenny2
> Severity: important
>
>
> I've just updated form etch to lenny, and xorg shows a strange behaviour.
> If i start X11 as usual (one external LCD connected via DVI), X starts
> (also the windowmanger and everything starts) but the screen remains black
> (only the backlight can be seen).

Do you have another machine from which you could ssh ? If so, try:
    DISPLAY=:0 xrandr
or
    xrandr -display :0
and send us the whole output in both cases (CRT plugged and then not
plugged).

What kind of output do you have on this machine/board? It looks like a
S-video monitor is detected. Assuming this wrong load-detection of this
TV output consumes one CRTC, it might be causing DVI-0 to not get a CRTC
and thus the screen remaining black. If S-video really messes up things,
you can try disabling it by adding:
    Option "Monitor-S-video" "FOO"
in the device section, and then adding the following monitor section
    Section "Monitor"
     Identifier "FOO"
     Option "Ignore" "true"
    EndSection
See III.4 of http://wiki.debian.org/XStrikeForce/HowToRandR12 for details

> But if i connect an crt at the VGA-Port
> (only connecting via vga-cable with the card, don't connect the powercord

IIRC, reading the EDID doesn't need the monitor to be powered.

Brice