Comment 38 for bug 982478

Jozsef Marton, the upstream patch is available in Precise+ as per http://kernel.ubuntu.com/git?p=ubuntu/ubuntu-precise.git;a=commit;h=5b84325a314d5d1008e1fe59e5d74d99b5b7768b . Hence, this is considered closed. If this doesn't address your issue, please reopen and execute the following in Trusty via a terminal:
apport-collect 982478