Comment # 1 on bug 957035 from Takashi Iwai

Could you check whether 4.3 kernel shows the same issue?  You can install it
from OBS Kernel:stable repo in addition to the current one.  After testing, you
can uninstall it again.

I guess the same issue is still present for the latest upstream as far as I
read the code, but just to be sure.  If it's still seen with the latest
upstream kernel, we should report it to upstream devs.

Thanks.