APPLIED[K/J]/Cmnt: [PATCH v2 0/1][SRU][J/K] Fail to output sound to external monitor which connects via docking station

[Stefan Bader]

On 07.03.23 18:19, Chris Chiu wrote:
> BugLink: https://bugs.launchpad.net/bugs/2009024
> 
> [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.
> 
> V2: change the SRU target from J/L/U to J/K
> 
> Chris Chiu (1):
>    UBUNTU: [Config] Enable CONFIG_SND_HDA_INTEL_HDMI_SILENT_STREAM
> 
>   debian.master/config/annotations          | 2 +-
>   debian.master/config/config.common.ubuntu | 2 +-
>   2 files changed, 2 insertions(+), 2 deletions(-)
> 

I had to modify the submission substantially because in the form 
submitted it did not apply to Kinetic and would have broken the builds 
for both of them. Next time I will just reject things like that. When 
doing config changes, you should at least double check with 
updateconfigs whether the change does not produce warnings or remains as 
committed. And if unsure run a test compile across all arches.

For now applied to kinetic,jammy:linux/master-next in modified form. Thanks.

-Stefan
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