Tom, since there is now a new 7.6.0-1ubuntu2 in karmic, the 7.6.0-1ubuntu2~bug446578~1 will not be installed. You can try this to force the wanted version:
sudo apt-get install libgl1-mesa-dri=7.6.0-1ubuntu2~bug446578~1 libgl1-mesa-glx=7.6.0-1ubuntu2~bug446578~1 libglu1-mesa=7.6.0-1ubuntu2~bug446578~1 mesa-utils=7.6.0-1ubuntu2~bug446578~1
It sounds like you set the modeset option correctly though.
Tom, since there is now a new 7.6.0-1ubuntu2 in karmic, the 7.6.0-1ubuntu2~bug446578~1 will not be installed. You can try this to force the wanted version: mesa-dri= 7.6.0-1ubuntu2~bug446578~1 libgl1- mesa-glx= 7.6.0-1ubuntu2~bug446578~1 libglu1- mesa=7. 6.0-1ubuntu2~bug446578~1 mesa-utils= 7.6.0-1ubuntu2~bug446578~1
sudo apt-get install libgl1-
It sounds like you set the modeset option correctly though.