Public bug reported:
[Impact]
Plug-in HDMI/DP cable onto docking station after system resumed from S3/s2idle,
there is no audio output from HDMI/DP even if you select the HDMI/DP audio
output manually from sound settings.
It shows this in dmesg when try testing speakers from sound settings
[ 2052.030247] snd_hda_codec_hdmi hdaudioC0D2: Unable to sync register
0x2f0d00. -5
[Fix]
This issue has been fixed in 4.16-rc1 by below commit
4918e1f87c5f PM / runtime: Rework pm_runtime_force_suspend/resume()
[Test]
Verified on Dell Latitude 3310 + Dell WD19 docking station
[Regression Potential]
Low, it fixes the device usage counter, and should also fix some other runpm
issues.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: Invalid
** Affects: linux-oem (Ubuntu)
Importance: Undecided
Status: Invalid
** Affects: linux (Ubuntu Bionic)
Importance: Undecided
Assignee: AceLan Kao (acelankao)
Status: In Progress
** Affects: linux-oem (Ubuntu Bionic)
Importance: Undecided
Assignee: AceLan Kao (acelankao)
Status: In Progress
** Also affects: linux (Ubuntu Bionic)
Importance: Undecided
Status: New
** Also affects: linux-oem (Ubuntu)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu)
Status: New => Invalid
** Changed in: linux-oem (Ubuntu)
Status: New => Invalid
** Changed in: linux (Ubuntu Bionic)
Status: New => In Progress
** Changed in: linux-oem (Ubuntu Bionic)
Status: New => In Progress
** Changed in: linux (Ubuntu Bionic)
Assignee: (unassigned) => AceLan Kao (acelankao)
** Changed in: linux-oem (Ubuntu Bionic)
Assignee: (unassigned) => AceLan Kao (acelankao)
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https://bugs.launchpad.net/bugs/1869642
Title:
No audio output from Dell WD19 HDMI/DP after resumed from S3 or s2idle
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