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

[Tim Gardner]

On 3/7/23 10:19 AM, 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(-)
> 
Acked-by: Tim Gardner <tim.gardner at canonical.com>
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Tim Gardner
Canonical, Inc