My laptop is an HP Pavilion dv6 TR7040x. I have this issue too. Similar to what Lorenzo M reported above, this issue does not occur when I reboot into Ubuntu 12.04.4 partition.
My laptop is an HP Pavilion dv6 TR7040x. I have this issue too. Similar to what Lorenzo M reported above, this issue does not occur when I reboot into Ubuntu 12.04.4 partition.