Comment # 22 on bug 1094834 from Takashi Iwai

OK, good to hear.  Then this is the same bug as bug 1094751, the runtime PM
problem with nouveau, which appears mostly when running as a discrete GPU (thus
it's turned off usually).

The fix is already pushed to my SLE15-UPDATE branch, so it'll be included in
the next kernel update.

You can keep using my kernel until the official update comes out.