tft pivot support and auto rotation

[Alexander Best]

hi there,

my tft comes with pivot support. i'm running x with the nvidia closed source
drivers and added

Option      "RandRRotation" "True"

to my xorg.conf. so now when i do `xrandr -o left` or `xrandr -o right` X gets
rotated which is great.

under windows however i've been told that this is being done automatically
when the screen gets rotated. is it possible to do this too under X without
having to use xrandr manually? i guess the tft must be sending some sort of
signal over the vga/dvi port to signal that it's been rotated.

cheers.
alex