[SRU][B/OEM-B/D/E/unstable][PATCH 0/2] reboot will introduce an alarm 'beep ...' during BIOS phase

[Hui Wang]

BugLink: http://bugs.launchpad.net/bugs/1840395

Since this fix is still in the maintainer's tree, I add the UBUNTU: SAUCE:
prefix in the patch title.

And this patchset is fixing a bug in the oem project, so please merge the
patchset to OEM-B asap.

[Impact]
We often hear the Beep noise when a couple of LENOVO laptops reboot, the
reproduce rate is about 3/10.

[Fix]
make the codec enter D3 before rebooting or poweroff, this can fix the issue.


[Test Case]
Tested on those LENOVO latpops, reboot 50 times, didn't reproduce the
noise issue.


[Regression Risk]
Low. We tested this patch on different lenovo and dell laptops, they
all worked well as bfore.


Hui Wang (2):
  UBUNTU: SAUCE: ALSA: hda - Let all conexant codec enter D3 when
    rebooting
  UBUNTU: SAUCE: ALSA: hda - Add a generic reboot_notify

 sound/pci/hda/hda_generic.c    | 19 +++++++++++++++++++
 sound/pci/hda/hda_generic.h    |  1 +
 sound/pci/hda/patch_conexant.c | 15 +--------------
 sound/pci/hda/patch_realtek.c  | 11 +----------
 4 files changed, 22 insertions(+), 24 deletions(-)

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2.17.1