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  1. Bug #1358116
  2. Comment #1

Comment 1 for bug 1358116

Revision history for this message
Hui Wang (hui.wang) wrote :

The fix has been merged by upstream.

commit f475371aa65de84fa483a998ab7594531026b9d9
Author: Hui Wang <email address hidden>
Date: Tue Aug 19 12:07:03 2014 +0800

    ALSA: hda - restore the gpio led after resume

    On some HP laptops, the mute led is controlled by codec gpio.

    When some machine resume from s3/s4, the codec gpio data will be
    cleared to 0 by BIOS:
    Before suspend:
      IO[3]: enable=1, dir=1, wake=0, sticky=0, data=1, unsol=0
    After resume:
      IO[3]: enable=1, dir=1, wake=0, sticky=0, data=0, unsol=0

    To skip the AFG node to enter D3 can't fix this problem.

    A workaround is to restore the gpio data when the system resume
    back from s3/s4. It is safe even on the machines without this
    problem.

    BugLink: https://bugs.launchpad.net/bugs/1358116
    Tested-by: Franz Hsieh <email address hidden>
    Cc: <email address hidden>
    Signed-off-by: Hui Wang <email address hidden>
    Signed-off-by: Takashi Iwai <email address hidden>