Now running linux-image-3.5-trunk-amd64 (3.5-1~experimental.1). Still happens.
Note that while I suspect the kernel, I'm in no position to rule out the X driver. Feel free to loop them in. -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org