Actually, this morning xserver-xorg-video-intel have been upgraded and it have solved the problem.
But a few minutes ago i had a new plymouth upgrade that brought back the problem.
So I tried to reinstall xserver-xorg-video-intel, and it solved the problem.
I think that plymouth upgrades just break the xorg conf (or something like that), but an aptitude reinstall xserver-xorg-video-intel (or ati, or nv, etc.) can fix it :)
Okay, i think i have a solution !
Actually, this morning xserver- xorg-video- intel have been upgraded and it have solved the problem.
But a few minutes ago i had a new plymouth upgrade that brought back the problem.
So I tried to reinstall xserver- xorg-video- intel, and it solved the problem.
I think that plymouth upgrades just break the xorg conf (or something like that), but an aptitude reinstall xserver- xorg-video- intel (or ati, or nv, etc.) can fix it :)