I agree with Alberto that it's most probably a kernel issue, because there are no problems in other distros (at least in Fedora and openSUSE). It could be a glitch in some of the ubuntu crazy kernel patches (I'd appreciate an option to turn them off)...
And finally, I have a question: Do you think there will be somebody going to fix this problem if this report is marked as invalid and all other related reports are marked as a duplicate?
I agree with Alberto that it's most probably a kernel issue, because there are no problems in other distros (at least in Fedora and openSUSE). It could be a glitch in some of the ubuntu crazy kernel patches (I'd appreciate an option to turn them off)...
And finally, I have a question: Do you think there will be somebody going to fix this problem if this report is marked as invalid and all other related reports are marked as a duplicate?