If this problem is really due to a kernel bug (as suggested by Josua Dietze in comment #38) then wouldn't it go away if grub were used to boot an older kernel? I'm sure this was one of the things I tried when I first noticed the problem.
If this problem is really due to a kernel bug (as suggested by Josua Dietze in comment #38) then wouldn't it go away if grub were used to boot an older kernel? I'm sure this was one of the things I tried when I first noticed the problem.