hotkey doesnt work anymore after reboot

[elypter]

I own a tx1000 series tablet-pc. It has some media-keys on the screen-frame, 4 of them are on the front side. One of them is recognized by ubuntu ( i dont know why the others are not) and i wanted to use it as a hotkey to rotate my screen. This worked well with xrandr and a little script, and this key called "XF86AudioMedia". Myproblem is that it didnt work anymore after rebooting, to get it worling again i had to set another key-combination and then set it back to "XF86AudioMedia" again.

Ubuntu version is 9.4, actualized 5 minutes ago

ProblemType: Bug
Architecture: amd64
DistroRelease: Ubuntu 9.04
ExecutablePath: /usr/bin/yelp
NonfreeKernelModules: nvidia
Package: yelp 2.25.1-0ubuntu5
ProcEnviron:
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
SourcePackage: <dont know>
Uname: Linux 2.6.28-11-generic x86_64