Bug 101451

Summary:	Regression: No capture controls on Dell XPS 13 (2015)
Product:	Drivers	Reporter:	Seth Forshee (seth)
Component:	Sound(ALSA)	Assignee:	Jaroslav Kysela (perex)
Status:	RESOLVED CODE_FIX
Severity:	normal	CC:	tiwai
Priority:	P1
Hardware:	All
OS:	Linux
Kernel Version:	4.1	Subsystem:
Regression:	No	Bisected commit-id:

Description Seth Forshee 2015-07-13 18:34:57 UTC

I noticed that somewhere between 4.1-rc4 and 4.1 final my microphone input quit working on this machine, and that no capture controls appeared in alsamixer. Reverting this commit gets them back:

  commit 8b99aba70c5f581860736855e211cf981f438ad2
  Author: Takashi Iwai <tiwai@suse.de>
  Date:   Mon Jun 15 11:59:32 2015 +0200

      ALSA: hda - Fix audio crackles on Dell Latitude E7x40

Comment 1 Seth Forshee 2015-07-13 18:37:58 UTC

Sorry, wrong commit. It was this one:

commit 82d6d8a4034a7480d582791763c89c328c2a8f0c
Author: Takashi Iwai <tiwai@suse.de>
Date:   Mon Jun 15 20:36:12 2015 +0200

    ALSA: hda - Fix noisy outputs on Dell XPS13 (2015 model)

Comment 2 Takashi Iwai 2015-07-13 19:25:31 UTC

This has been already fixed in 4.2-rc1 by commit 831bfdf9520e389357cfeee42a6174a73ce7bdb7.
The backport to stable kernel is still being processed due to too many queued patches.