Comment 38 for bug 189393

(In reply to comment #34)
> I tried TV out, PAL, on the composite connector of a Pundit-R (9100 IGP).
> Unfortunately, after running
>
> xrandr --output S-video --set tv_standard pal
> xrandr --output S-video --off
> xrandr --output S-video --mode 800x600
>
> The image is still not synced correctly. It is scrolling over the TV.
> Where I can hunt the timing problems? I have been searching around
> on the web, and I found this thread as the most recent related problem.

Boot up your computer with only tv-out attached and don't start X, stay in console. Grab radeondump (git://people.freedesktop.org/~glisse/radeondump) and apply this patch:
http://www.botchco.com/alex/xorg/fixpll_radeondump.diff
Then use an application like vbetest to set 800x600 with tv-out active and when the mode is active, use radeondump to dump the registers. Send me the dump, and I'll get it fixed up.