I’ve had my BBxM rev C1 for about a full year now. I got a new 1080p TV and for some reason it doesn’t accept ANY resolution I specify - it says the resolution is unsupported, which it isn’t. Such resolutions could be something like 640x480MR-16@60, hd720, 1280x720MR-24@60, 1920x1080MR-24@60 and so on. I have tried other devices with the TV at multiple resolutions and color depths and they all seem to work. One of those devices was a PC using an nvidia 7900GT (a 7 year old GPU) which I connected using a DVI-A to HDMI converter, so I don’t think this has anything to do with my TV being incapable of handling a different signal protocol.
I tried my BB on a regular PC monitor with a DVI port and it works fine at varying resolutions. While connected to the new TV, I am able to login through SSH.
As a side note, I can get s-video to work on the TV, but I don’t want to be stuck with a limited resolution and a cut-off image. Also, as soon as X starts I lose my s-video signal; it seems to switch to DVI.