Comment # 1 on bug 1090457 from Takashi Iwai

Please give hwinfo output.  Also give dmesg output before and after the
problem; at least we need to check whether any relevant kernel message appears.

And, does the problem mentioned in the other report (it gets *reliably* broken
by detaching / re-attaching) in your case, too?

Last but not least, please try the recent upstream kernel (OBS Kernel:stable
repo) to see whether the problem still appears or not.