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** Changed in: linux (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1866357
Title:
Pop sound from build-in speaker during cold boot and resume from S3
Status in linux package in Ubuntu:
Incomplete
Bug description:
[Description]
On a Dell Wyse 5070 ThinClient device with 18.04 installed, during cold boot
and resume from S3, internal speaker will have a noticeable short pop noise.
[More detail]
There are similar bugs reported indicating it's related to codec powersaving
[1]. On some devices, disable powersaving can workaround it, but the same
workaround does not work on this device.
[1] https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1821663
[Experiment]
With Ubuntu 16.04 (4.13 kernel) installed --> NO pop noise
With Ubuntu 16.04.x (4.15 kernel) installed --> pop noise
With Ubuntu 18.04.x (4.15, 5.0 kernel) installed --> pop noise
So I started testing kernels between 4.13 and 4.15, found the issue does not
present before 4.15.0-58 kernel (including 4.15.0-58), and kernel after that
started to have the pop noise.
[HW info]
Codec: Realtek ALC3253
00:0e.0 Audio device [0403]: Intel Corporation Device [8086:3198] (rev 03)
Device is not with me at this moment, I will provide more info if
required.
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