Comment 36 for bug 1451233

Paweł Kowalik, to advise, upstream has made a core change that may help here regarding the open source driver:
https://bugzilla.kernel.org/show_bug.cgi?id=105471

It wouldn't hurt to test this following https://wiki.ubuntu.com/Kernel/KernelBisection#Testing_a_newly_released_patch_from_upstream .