Pandaboard Rev A 1920x1080

I have successfully loaded the screen resoltuion to 1920×1200 (not 1920×1080) with Pandaboard rev. A3.
There is only an issue when writing to hard disk there is a noise on the audio output. I think this can be adjusted : ).

at high resolution like 1920×1080 my desktop image (the defaul of risc os open usb native stick) i see green line over the image’s edges. Is this right?