Well, the bug reappeared today, which makes me suspect that the graphics card may play a role. My laptop (ThinkPad T400) has both a discrete graphics card (ATi 3470 or something like that) and an onboard Intel chip (4500MHD). When I saw the bug last week, I had the Intel chip activated. Later, I changed to the ATi card and the bug disappeared. Today, I went back to the Intel chip, and there it is again.
Of course, Michal Koziorowski and Alex Willmer both have an nVidia graphics card according to their logs, which doesn't really support this theory.
Anyway, linux-backports-modules doesn't seem to resolve this bug (sorry for the false alarm above).
Well, the bug reappeared today, which makes me suspect that the graphics card may play a role. My laptop (ThinkPad T400) has both a discrete graphics card (ATi 3470 or something like that) and an onboard Intel chip (4500MHD). When I saw the bug last week, I had the Intel chip activated. Later, I changed to the ATi card and the bug disappeared. Today, I went back to the Intel chip, and there it is again.
Of course, Michal Koziorowski and Alex Willmer both have an nVidia graphics card according to their logs, which doesn't really support this theory.
Anyway, linux-backports -modules doesn't seem to resolve this bug (sorry for the false alarm above).