SRU: * https://lists.ubuntu.com/archives/kernel-team/2021-September/123800.html (oem-5.13, impish) * https://lists.ubuntu.com/archives/kernel-team/2021-September/123808.html (oem-5.14, unstable)
** Description changed: + [SRU Justification] + + [Impact] + + HD-audio codec shutdown is not quite right when powering off the + controller side. This causes pop noises on some platforms. + + [Fix] + + While previously in bug 1939541, a local fix for Cirrus CS8409 only is + proposed the upstream as in + https://lore.kernel.org/lkml/20210812183433.6330-2-vita...@opensource.cirrus.com/ + . This initiated a discuss to create a generic solution as in + https://lore.kernel.org/all/20210813081230.4268-1-ti...@suse.de/ . + + [Test Case] + + Shutdown Ubuntu that is running a patched kernel and see if a pop sound + is still made. + + [Where problems could occur] + + While this tries to suspend the codec devices at shutting down, out of + tree drivers without (runtime-)suspend support may fail to react + correctly. And since this removes .reboot_notify callback from struct + hda_codec_ops, it may break such oot drivers, too. + + [Other Info] + + This depends on patches for https://bugs.launchpad.net/bugs/1939541 . + + ========== original bug report ========== + [Reproduce Steps] 1. Attach external speaker to SUT 2. Try to reboot SUT or stay in OS. [Results] - Expected Result - No noise. - Actual Result - Noise will pop up during WB or stay in Ubuntu OS when external speaker attached. + Expected Result + No noise. + Actual Result + Noise will pop up during WB or stay in Ubuntu OS when external speaker attached. [Others] [Scenario 1] Login to the Ubuntu OS. (Occurs only in Cirrus, within 5 seconds after logging in to OS) Can 100% reproduce on Cirrus MB with Ubuntu. Noise can be heard (咚咚 Sounds) after login the Ubuntu within 5 secs. [Scenario 2] Reboot Ubuntu OS (Both Curris and Realtek happen. WB/CB/shutdown OS) Can 100% reproduce on Cirrus MB with Ubuntu. Noise can be heard While both exiting OS and entering OS. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1942043 Title: Noise will pop up during WB or stay in Ubuntu OS when external speaker attached To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/1942043/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
