Judging from reports on various forums, the amount of overscan in fullscreen mode varies depending on TV. On my Panasonic PX60, it's pretty much unusable both in the command line and X.

Thinking about it, the same happens if I run my PC into the same HDMI port use 1280x720p as the resolution. I wonder if *all* 720p images are being overscanned by my TV - not uncommon for consumer sets. The fix in ps3fb.c being to reduce the resolution right down so it fits. That would explain why full mode has 0,0 for borders - but I'm not clear what the additional "PS3FB_RES_FULL" statement would do. If that's the case though, setting the "margins" to 0,0 for all resolutions will just make all options overscan. I wonder if the solution is to reduce the number of pixels, but not to 0 - could be a case of trial and error to figure it out...

I'll have a poke around...