On Tue, 16 Feb 2016 15:08:24 +0100 Eric <debian-user@vvmail.fr> wrote: > And thanks for helping me! > I tried dpkg-reconfigure gdm3, but it didn't changed anything > unfortunately I'm still facing that nasty bug. > What can I do more, to fix it or give some more clues about it? I'd > like to avoid reinstall my debian. It would be useful to have some more information. Could you please post the output of dmesg? Then we can isolate the issue. Maybe.