Does this issue happen in Raring? Can you also see if it exists in the latest mainline kernel after you rule out it being related to any hardware: http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.12-rc1-saucy/
Does this issue happen in Raring? Can you also see if it exists in the latest mainline kernel after you rule out it being related to any hardware: kernel. ubuntu. com/~kernel- ppa/mainline/ v3.12-rc1- saucy/
http://