Interesting update. I've followed the build instructions for the Ubuntu kernel: https://wiki.ubuntu.com/Kernel/BuildYourOwnKernel
By cloning the repo: git://kernel.ubuntu.com/ubuntu/ubuntu-impish And building the kernel tagged as: Ubuntu-5.11.0-20.21+21.10.1 Which is *older* than the last _good_ Ubuntu kernel I have (5.11.0-37) left installed from the previous version of Ubuntu (21.04, Hirsute) but the problem is *reproducible*. This means that the issue is a combination between the configuration in Ubuntu 21.10 and some Ubuntu kernels built from the ubuntu-impish repo. I have to try building another Ubuntu kernel from the Hirsute repo and see what happens. Apparently all mainstream kernels >= 5.11 and all Ubuntu Impish kernels have this issue, when running Ubuntu 21.10 (desktop). -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1947614 Title: Laptop fans spin at ~50% w/o CPU load with kernel 5.13 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1947614/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
