Some update. I left my laptop unattended the whole night. Windows did perform a reboot after that. For some reason my USB mouse was unplugged and this morning my laptop did boot successfully my debian system.
So short story: just unplugged any USB device and it should boot nicely. Let me know if I should just close this bug. Thanks, -- Mathieu -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org