I have a workstation that will not reboot. It shuts the OS down, but won’t restart unless I power the machine off then turn it back on. I recently upgraded from 10.2. It rebooted fine when it was 10.2. Any help is appreciated.
Have you tried running it in failsafe or with noacpi as a kernel parameter? Might give you a bit more information.
Also - you say it doesn’t reboot but you can switch it off. Do you mean by holding the switch in, or does it turn itself off happily when you tell it to in software?