The battery on the machine in question was faulty and replacing it seems to have resolved this bug. I still don't understand how it was causing the behaviour I saw, nor why it seemed to be (semi-)repeatable. Thank you all for your help and patience.
Cheers, - Martin -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
