Comment 5 for bug 318184

Hmm, not sure if this is a peculiarity of your hardware or a general problem, but fairly sure it's a driver issue in any case. See http://bugs.freedesktop.org/show_bug.cgi?id=16186 for example.

Please provide the information requested in the previous comment, and as well the output of xrandr --verbose and 'sudo get-edid|parse-edid' with the TV connected.