xf86-video-ati, XRandR 1.2, and what used to be MergedFB

Jan Willies jan at willies.info
Mon Sep 17 07:09:14 PDT 2007

Marius Groeger wrote:
> On Mon, 17 Sep 2007, Michel Dänzer wrote:
>>> This problem persists. Apparently the little embedded screen relates 
>>> to the implicitly not entirely disabled S-Video screen, hence the 
>>> dimension of 320x200 pixels. Strangely enough, the infamous "xrandr 
>>> --output S-video --off" DOES NOT turn this embedded screen off!
>> Probably because the clients don't re-query the Xinerama information.
>> Try disabling the S-video output in xorg.conf instead.
> How do I do this? I can't seem to find a suitable option in radeon.man.
> You're not talking about DefaultConnectorTable, are you? I am now using a
> single screen initial ServerLayout as Bernard suggested, however to no 
> avail.

Section "Device"
         Option          "monitor-S-video"       "TV"

Section "Monitor"
         Identifier      "TV"
         Option          "Enable"        "FALSE"

> But the real problem is that the VGA consistenly remains dark, even if
> enabled via xrandr. Do you have a hint for this problem? Without this, 
> the driver is unusable in a dual head setup. :-(

I had the same trouble. For me it works only when disabling S-video 
first and xrandr. this is my script in .xinitrc (you don't need the 
modeline and addmode thingie I guess, it's because my monitor reports 
faulty DDC values):

xrandr --output S-video --off
xrandr --newmode "1440x900"  106.50  1440 1528 1672 1904  900 903 909 
934 -hsync +vsync
xrandr --addmode VGA-0 1440x900
xrandr --output VGA-0 --auto
xrandr --output VGA-0 --mode 1440x900
xrandr --output VGA-0 --right-of LVDS

it's the only solution I have found so far. Disabling via xorg.conf 
didn't work for me. See https://bugs.freedesktop.org/show_bug.cgi?id=12392

- Jan

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