Thanks, that we have a defined CD version that works and a later one that does not work means that it should be possible to narrow down exactly which package update broke.
1. On the updated broken system, do you still have old kernels installed that you can try from the grub menu? This will show if a kernel upgrade broke it.
2. Run the working live CD, update xserver-xorg-video-ati and xserver-xorg-video-radeon on it and see if it breaks (after logging out and in again). If it does not:
3. Update xserver-xorg-core and see if it breaks now. Updating this package might force the updating of many other packages though.
Thanks, that we have a defined CD version that works and a later one that does not work means that it should be possible to narrow down exactly which package update broke.
1. On the updated broken system, do you still have old kernels installed that you can try from the grub menu? This will show if a kernel upgrade broke it.
2. Run the working live CD, update xserver- xorg-video- ati and xserver- xorg-video- radeon on it and see if it breaks (after logging out and in again). If it does not:
3. Update xserver-xorg-core and see if it breaks now. Updating this package might force the updating of many other packages though.