I spent the day trying to get TV output on my laptop, a Dell Inspiron 8100. The graphic chip is an ATI Radeon Mobility 9000 R250 LF.
I installed Xorg version 7.1.1 with the ATI proprietary driver also known as fglrx version 8.28.8. I used the following command to setup xorg.conf:
aticonfig --initial=dual-head --tvf=PAL-B --tvs=VIDEO --ovon=1 --ovt=Xv
I get TV output in color and it looks nice. I also have video overlay on both screens. Many people claim that it does not work, they must be talking about an older version of the ATI driver.
However when I play a video on the secondary screen a quarter is chopped off at the bottom. This happens even if the video is played inside a window, this makes me think there is a bug in the video overlay. It works fine on the primary screen.
There is also a mosaic of ghost videos on the primary screen. The driver is probably using wrong area of the video memory. The cursor is broken on the secondary display.
Close but no cigar.
This has nothing to do with the above but I was quite impressed that Ubuntu booted on a LVM partition.