When I connect my Panasonic Viera TV (720p) via HDMI to my notebook the desktop is cut on the TV. I tried different resolutions but no matter which it's always cut on each side... I had the same problem on Windows 7 but managed to correct it with the resolution of 1184x666. When I try this with xrandr (I manually added and activated this mode) on Ubuntu (12.10, also on 12.04) it just gives me a blank screen.
I found a couple of posts that deal with the same problem and tried out the suggested solutions but nothing works. In the meanwhile I think it's the problem of the TV. But then if it works on Windows, why not on Ubuntu?
Details for TV: Panasonic LCD TV TX-L32X10E
I would be very greatful for further suggestions!