Bug#573343: Bug confirmed here
> could you please try with a more recent kernels? 2.6.32-4 should be
> far better than 2.6.32-trunk; bonus points if you can grab one built
> from linux-2.6/2.6.32-11, uploaded a few hours ago. Many bugfixes got
> merged since the kernel version you're currently using, and it'd be
> nice to make sure whether the bug(s) you're having are still
> reproducible with newer versions.
I've tried two things thanks to your advices :
- 2.6.32-trunk and 2.6.32-4_10 with kernel modesetting disabled : no
- 2.6.32-4_11 with kernel modesetting enabled : no more freeze
So I would guess (but it really is just a guess) that the problem came
from kms and that it has been solved at least since kernel 2.6.32-4_11.
Thanks a lot for your help,