OK, this is embarrassing, but I have solved the problem. The system had a headphone plugged in that had fallen behind the system unnoticed (and I thought the sound from its one speaker was the motherboard speaker). Unplugged the item and all is well.
Stuart -- To UNSUBSCRIBE, email to [email protected] with a subject of "unsubscribe". Trouble? Contact [email protected] Archive: http://lists.debian.org/[email protected]
