Thanks, this showed the problem:
WARNING: modinfo for module fglrx failed: modinfo: could not open /lib/modules/2.6.24-12-generic/volatile/fglrx.ko: No such file or directory
WARNING: modinfo for module nvidia_new failed: modinfo: could not open /lib/modules/2.6.24-12-generic/volatile/nvidia_new.ko: No such file or directory
So for some reason those are not generated on the live system, although linux-restricted-modules should be installed.
Thanks, this showed the problem: 2.6.24- 12-generic/ volatile/ fglrx.ko: No such file or directory 2.6.24- 12-generic/ volatile/ nvidia_ new.ko: No such file or directory
WARNING: modinfo for module fglrx failed: modinfo: could not open /lib/modules/
WARNING: modinfo for module nvidia_new failed: modinfo: could not open /lib/modules/
So for some reason those are not generated on the live system, although linux-restricte d-modules should be installed.