** 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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https://bugs.launchpad.net/bugs/1840394

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

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