Nicola, can you look at: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/828550 and see if you can confirm any of those reports - that bug may be related to this one.
Nicola, can you look at: /bugs.launchpad .net/ubuntu/ +source/ linux/+ bug/828550
https:/
and see if you can confirm any of those reports - that bug may be related to this one.