video= semantics changed?

[Marius Gröger]

With the latest d-r-t my grub cmdline option video=1280x720 at 50 no longer 
works (RS780, output to LCD TV via HDMI). The fbcon apparently is 
enabled, but the TV doen't get a displayable picture anymore. Booting 
with d-r-t from 4 weeks ago works and correctly uses the EDID reported 
1280x720 at 50 mode.

Does anyone know what might have happened to the video= code? I also 
tried video=1280x720R at 50, but that didn't work either.

X works fine though.

Thanks
Marius