2

Sometimes, typically in the first minute after booting I get the following error on my Ubuntu 18.04 LTS setup:

Kernel panic - not syncing: Timeout: Not all CPUs entered broadcast exception handler
[....] Shutting down cpus with NMI
[....] Kernel Offset: 0xe4000000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff
[....] Rebooting in 30 seconds..

After that the machine just freezes and never reboots. The PC also has a dual boot setup with windows 10 which never crashes.

Any idea what might be causing this?

MaxJ
  • 85
  • 3
  • 11

2 Answers2

2

I believe this is a known bug. Apply the latest kernel with apt full-upgrade.

Alternatively, add processor.max_cstate=0 intel_idle.max_cstate=0 idle=poll to the kernel commandline editing GRUB_CMDLINE_LINUX in /etc/default/grub and running update-grub, then reboot.

More detail on editing kernel cmdline rules can be found here: https://askubuntu.com/a/19487/853283

ThankYee
  • 1,893
0

I faced similar issue on Debian Bookworm on Supermicro SYS 1029P WTRT with fresh install. By trial and error I found that the server was booting with HyperThreading disabled with no problems at all.

Updating BIOS to the last version resolved the issue.

Solution, posted on this thread didn't help in my case.

Vladimir Osinskiy
  • 1