[SRU][B/OEM-B/C][PATCH 0/2] the external mic can't work on a Dell machine

Hui Wang hui.wang at canonical.com
Thu May 30 11:59:58 UTC 2019

BugLink: https://launchpad.net/bugs/1831065

These two patches are already in the kernel-v5.0, so only B and C need
these two patches.

On a Dell machine, there is no other output devices but a headphone
on it, when plugging headset, the headset-mic can't work.

The headphone detection method is buggy, the driver can't detect
the headphone, then the driver will not initialize for headset-mic,
after applying these patches, the problem is fixed.

[Test Case]
Plug headset and record the sound from headset-mic, it works well.

[Regression Risk]
Low. the patch just change the headphone detection function, and the
function is already in the kernel from 5.0-rc, no bug is reported.

Kailang Yang (1):
  ALSA: hda/realtek - Fixed hp_pin no value

Takashi Iwai (1):
  ALSA: hda/realtek - Use a common helper for hp pin reference

 sound/pci/hda/patch_realtek.c | 127 ++++++++++++++++++----------------
 1 file changed, 68 insertions(+), 59 deletions(-)


More information about the kernel-team mailing list