** Also affects: linux-oem-5.6 (Ubuntu)
Importance: Undecided
Status: New
** No longer affects: linux (Ubuntu)
** Changed in: linux-oem-5.6 (Ubuntu)
Importance: Undecided => High
** Changed in: linux-oem-5.6 (Ubuntu)
Status: New => In Progress
** Also affects: linux-oem-5.6 (Ubuntu Focal)
Importance: Undecided
Status: New
** Description changed:
- This bug is for tracking purpose
+ Since this patch is CCed to stable kernel, I just sent this patch
+ to oem-5.6 kernel, our oem project is waiting for this patch to
+ be landed to oem-5.6 kernel first.
+
+ [Impact]
+ On the Dell TGL laptop, if connecting a monitor via type-c to DP/HDMI
+ adapter, we will have an audio issue, that is playing the music and
+ suspend the system, after resuming back, the audio can't output from
+ DP/HDMI monitor anymore.
+
+ [Fix]
+ Cherry-pick a fix from upstream, this patch is verifying the needed
+ converter and pin to be in the D0 state.
+
+ [Test Case]
+ Connect a monitor with USB-C to DP/HDMI adapter, open the youtu.com
+ and playing sth, suspend the system and resume, check if the sound
+ could play the music, repeat 20 times, all work very well.
+
+ [Regression Risk]
+ If this patch could introduce regression, it should be the power
+ consumption regression on Intel HDMI audio, since it makes the
+ converter and pin to be D0 state earlier than before. But this
+ impact is very small. one converter and one pin consume very little
+ power.
** Changed in: linux-oem-5.6 (Ubuntu Focal)
Status: New => In Progress
** Changed in: linux-oem-5.6 (Ubuntu Focal)
Importance: Undecided => High
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https://bugs.launchpad.net/bugs/1893290
Title:
The DP/HDMI audio via USB-C to DP dongle or Dell Zeus adapter can't
work after suspend
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