Public bug reported: [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. ** Affects: linux (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. 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: New 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. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1866357/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
