On Wed, Aug 15, 2018 at 6:27 PM Linus Torvalds <torva...@linux-foundation.org> wrote: > > I have no idea _why_, but it's consistent, and it bisects down to > > c647f806b8c2 "ALSA: hda - Allow multiple ADCs for mic mute LED controls" > > where the previous commit works fine, but that commit definitely > causes the problem.
Hmm. That commit changes the return value of the snd_hda_gen_add_micmute_led(), but doesn't change any of the callers. Now, almost no caller actually checks the return value. Almost. There is *one* caller that does, though: sound/pci/hda/dell_wmi_helper.c: alc_fixup_dell_wmi() And yes, the laptop that breaks is a Dell. An XPS13. I bet that instead of reverting, I can just change that (snd_hda_gen_add_micmute_led(codec, dell_micmute_update) <= 0); to test for "< 0" instead of "<= 0". Linus