openCl - not recognizing GPU, during remote logins

in the last couple of days I had some issues with my Ubuntu/Ati GPU based calculation units. They refused to execute any calculations, whenever I tried to use SSH to run them.

So a bit of googleling later I found the following informations in a hidden pdf:



a. Add the following lines at the end of /etc/gdm/Init/Default,
before the exit 0, to modify the security settings, allowing remote
sessions to access the X server and ensuring that remote sessions have
access to the necessary device files when communicating with the GPU:
xhost +
chmod uog+rw /dev/ati/card*
b. If you normally use bash, add the following line to the end of
/etc/bashrc file to ensure remote sessions know which X server to
access.
case $DISPLAY in ’’) export DISPLAY=:0;; *) ;; esac
NOTE: ’ ’ are two single quotes, not a single double-quot



Taken from:

http://developer.amd.com/sdks/AMDAPPSDK/assets/App_Note-Running_AMD_APP_Apps_Remotely.pdf

Now everything works fine and all is dandy again.