radeon 9200SE tv out works only grayscale

Hi,
I downloaded this patch

http://megahurts.dk/rune/stuff/xorg7-6.5.8.0-tv_output.patch.gz

and applied it to

xserver-xorg-video-ati-6.6.3

taken from debian unstable, but basically, its the same as

http://xorg.freedesktop.org/releases/individual/driver/xf86-video-ati-6.6.3.tar.gz

and I fixed some compilation issues becase the patch was made for
6.5.8. I set the resolution in xorg.conf to 800x600 and put

Option "MonitorLayout"   "AUTO, NONE"
Option "TVOutput" "PAL"

to the Device section (I am living in the Czech Republic, so we use
PAL). I turned off the computer, plugged the svideo cable in, turned
on the computer and the TV showed the booting process and X, but
everything in grayscale. I tried 8bpp, 16bpp, 24bpp color depth, but
it was still grayscale. I also tried putting

Option "IgnoreEDID" "true"

to the Device section and

Modeline "800x600" 40.00 800 840 968 1056 600 601 605 628 -hsync -vsync

to the Monitor section, but I didn't see any difference (still grayscale).

Does anyone now how to get colors working on 9200SE? Maybe the problem
is not in the gatos patch, because even the text mode is in grayscale.
Any hint or suggestion would be appreciated.

Thanks,
Ondrej Certik

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