** Changed in: linux (Ubuntu)
   Importance: Undecided => Critical

** Description changed:

- 1) Power on system with Salomon
- 2) Connect an external DP or HDMI monitor via DP/HDMI port
- 3) check audio output
- 4) Disconnect external monitor
- 5) Suspend system via power menu
- 6) resume the system via press power button on system
- 7) Connect an external DP or HDMI monitor via DP/HDMI port
- 8) check audio output
- ** select output as HDMI/DP, click "Test Speakers"
- some error from dmesg
+ This fix is in the v5.3-rc3, and EAON already has this patch by backporting 
stable, so
+ this patch is only for B/D.
+ 
+ [Impact]
+ After S3, the intel hdmi audio on a dell laptop print the error like below:
  [ 2052.030247] snd_hda_codec_hdmi hdaudioC0D2: Unable to sync register 
0x2f0d00. -5
- [ 2064.937495] snd_hda_codec_hdmi hdaudioC0D2: Unable to sync register 
0x2f0d00. -5
- [ 2074.867368] snd_hda_codec_hdmi hdaudioC0D2: Unable to sync register 
0x2f0d00. -5
- [ 2086.902482] snd_hda_codec_hdmi hdaudioC0D2: Unable to sync register 
0x2f0d00. -5
- [ 2116.339892] snd_hda_codec_hdmi hdaudioC0D2: Unable to sync register 
0x2f0d00. -5
+ 
+ And the hdmi audio can't work anymore after this.
+ 
+ [Fix]
+ For Intel hdmi audio codec, it doesn't need to resume forcibly, because the 
i915 side
+ probably is not ready to let hdmi codec work, since the intel hdmi audio uses 
component
+ framework, let i915 control the hdmi codec.
+ 
+ [Test Case]
+ Tested on that dell laptops, the hdmi audio doesn't have any issues anymore 
after
+ applying this patch.
+ 
+ [Regression Risk]
+ Low. We tested this patch on a couple of machines (dell and lenovo).

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Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1840394

Title:
  Intel HDMI audio print "Unable to sync register" errors

Status in HWE Next:
  New
Status in linux package in Ubuntu:
  Incomplete

Bug description:
  This fix is in the v5.3-rc3, and EAON already has this patch by backporting 
stable, so
  this patch is only for B/D.

  [Impact]
  After S3, the intel hdmi audio on a dell laptop print the error like below:
  [ 2052.030247] snd_hda_codec_hdmi hdaudioC0D2: Unable to sync register 
0x2f0d00. -5

  And the hdmi audio can't work anymore after this.

  [Fix]
  For Intel hdmi audio codec, it doesn't need to resume forcibly, because the 
i915 side
  probably is not ready to let hdmi codec work, since the intel hdmi audio uses 
component
  framework, let i915 control the hdmi codec.

  [Test Case]
  Tested on that dell laptops, the hdmi audio doesn't have any issues anymore 
after
  applying this patch.

  [Regression Risk]
  Low. We tested this patch on a couple of machines (dell and lenovo).

To manage notifications about this bug go to:
https://bugs.launchpad.net/hwe-next/+bug/1840394/+subscriptions

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