** Changed in: linux-oem-6.1 (Ubuntu Jammy)
Status: Incomplete => Fix Committed
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https://bugs.launchpad.net/bugs/2009024
Title:
Fail to output sound to external monitor which connects via docking
station
Status in HWE Next:
New
Status in linux package in Ubuntu:
Fix Committed
Status in linux-oem-6.1 package in Ubuntu:
Invalid
Status in linux source package in Jammy:
Fix Committed
Status in linux-oem-6.1 source package in Jammy:
Fix Committed
Status in linux source package in Kinetic:
Fix Committed
Status in linux-oem-6.1 source package in Kinetic:
Invalid
Status in linux source package in Lunar:
Fix Committed
Status in linux-oem-6.1 source package in Lunar:
Invalid
Bug description:
[Impact]
No sound output from the external monitor which connect via some docking
station. It only happens when user boot the system with docking station
connected. Re-plug the docking station can fix this issue. Or plug the docking
station later won't trigger this problem.
[Fix]
Turn on the CONFIG_SND_HDA_INTEL_HDMI_SILENT in kernel config. It will start
sending an "audio keepalive" to the monitor as soon as it is connected.
[Test]
Connect the external monitor to the Atomic Type-C Dock (HD22Q) and boot the
system with the dock connected. Play sound via HDMI/DP port and check if
there's any audio output from the external monitor.
[Where problems could occur]
It sends the "audio keepalive"(silent stream) to the monitor when connected.
Doesn't affect original workflow of the audio system.
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