The kernel-package 13.003 from Irishbandit's link in hist comment https://bugs.launchpad.net/ubuntu/+source/kernel-package/+bug/1308183/comments/15 solved the issue for Ubuntu Studio 14.04.2 LTS, too.
The kernel-package 13.003 from Irishbandit's link in hist comment https:/ /bugs.launchpad .net/ubuntu/ +source/ kernel- package/ +bug/1308183/ comments/ 15 solved the issue for Ubuntu Studio 14.04.2 LTS, too.