Public bug reported:
[Summary]
Monitor support HDMI and USB channel,
[Reproduce steps]
1. connect system to monitor with type c to DP dongle and DP cable.
2. Connect system to monitor with USB type A to USB type B cable.
3. Connect 3.5mm audio combo jack headset.
4. Do shutdown, unplug/plug. sound can not keep on monitor speaker (HDMI).
switch to USB speaker.
[Results]
Expected result
Sound keep from monitor speaker(HDMI)
Actual result
Sound switch to USB speaker.
[Additional Information]
SKU ubuntu 18.04.5 LTS
BIOS:1.10.1
Fail on monitor C2722DE, C2422HE. S2422HZ. S2722HZ. P2418HZ.
Fail rate: 100/%.
Monitor comment: fail on ubuntu 20.04.
** Affects: ubuntu
Importance: Undecided
Status: New
** Tags: dell
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https://bugs.launchpad.net/bugs/1942073
Title:
[Dell][South Peak 14] sound switch USB channel when do re-connect
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