this is a driver bug most likely. Which chipset/driver are you using? Also, there might be a more bleeding edge driver linux-backports-modules-jaunty package; try to install that one and see if after restarting your system your problem resolves.
this is a driver bug most likely. Which chipset/driver are you using? Also, there might be a more bleeding edge driver linux-backports -modules- jaunty package; try to install that one and see if after restarting your system your problem resolves.