Possible duplicate of https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1046512
Reverting this https://patchwork.kernel.org/patch/1283051/ solves the problem for me.
Possible duplicate of https:/ /bugs.launchpad .net/ubuntu/ +source/ linux/+ bug/1046512
Reverting this /patchwork. kernel. org/patch/ 1283051/
https:/
solves the problem for me.