--- Comment #4 from Takashi Iwai firstname.lastname@example.org --- (In reply to Tomáš Chvátal from comment #3)
Also updated bios to latest (had 1.6 now is 1.10) and tried kernel 4.9rc7.
Still present there.
Care to report to upstream, e.g. bugzilla.kernel.org? Feel free to put me (email@example.com) in Cc.