I suspect this may really be a duplicate of bug 63134 based on the panic and the hardware you have (although my french is pretty rusty). Can you check if the kernel panic screen mentions "quirk_via_abnormal_poweroff" like the screenshot in http://librarian.launchpad.net/4557331/DSC01924.JPG?
Using "acpi=force" as a boot option should also work as a work-around, if my hunch is correct. Please mark this as duplicate (or comment here) if it looks like I'm right. -- kernel panic https://launchpad.net/bugs/69790 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
