I have the same issue with an AMD EPYC 9334 32-core processor. The Problem appears with an upgrade to Ubuntu 22.04.4., already with live ubuntu from a bootstick. Ubuntu 22.04.3 works fine. A fresh install (without updates on OS install) of 22.04.3 runs without problems. After the 1st apt upgrade the problem appears. Intrestingly, as well with the updated 6.5.0-21 kernel as with the 6.2.0.26 kernel that was installed with 22.04.3.
Besides, with Kernel 6.5.0-21 the error message on boot now is 'CPU32 failed to report alive state'. Also, when running the root shell in recovery mode the missing thread is online. Motherboard is a Gigabyte MZ33-AR0. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2042888 Title: It shows 'smpboot: do_boot_cpu failed(-1) to wakeup CPU#96' in system dmesg log with kernel version 6.2.0-060200-generic. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-hwe/+bug/2042888/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
