See also: https://askubuntu.com/questions/1361496/irq-185-audiods-using-more-than-60-of-the-cpu Unloading sound modules using "sudo alsa unload" frees cpu resources. Seems to be related to intel soundwire kernel module. [ 2430.491653] sdw_cdns_irq: 137830 callbacks suppressed [ 2430.491658] intel-sdw intel-sdw.0: Bus clash for control word [ 2430.491683] intel-sdw intel-sdw.1: Bus clash for control word [ 2430.491736] intel-sdw intel-sdw.0: Bus clash for control word
I've verified the problem with the 5.13 kernel from 21.10 and that kernel fixes the issue. root@ubuntu:~# uname -a Linux ubuntu 5.13.0-16-generic #16-Ubuntu SMP Fri Sep 3 14:53:27 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux root@ubuntu:~# head /etc/lsb-release DISTRIB_ID=Ubuntu DISTRIB_RELEASE=21.10 DISTRIB_CODENAME=impish DISTRIB_DESCRIPTION="Ubuntu Impish Indri (development branch)" So the problem will probably be solved with the new HWE for 20.04 based on the 21.10 kernel. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1943392 Title: irq/174-AudioDS causing high cpu load since 20.04.02 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/1943392/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
