Sometimes i encounter, my system not shut down. now is one of that times - i go "start" -> "leave" ->"shutdown", and nothing appear. in normal case there appear a "shutdown" window, where i choose - shut down or restart. but now it not appear, and as so i cannot shutdown system normally.
to reboot/shut down. The entire shutdown procedure takes about 1-2 seconds. But after every boot Firefox says it was shut down prematurely, very likely indicating that it was brutally murdered rather than laid to rest.
I have a problem with shutting down my systems. When I shutdown my laptop everything looks normal but after few seconds it powers on by itself. I tried to shut it down through terminal with "shutdown -h now" and it worked but only on Arch in Ubuntu with "shutdown -hH now" or "shutdown -H now" it hangs on spash screen.
on both host and guest running CentOS 6.3 with KVM/Qemu virtualization, I have the following scenarios:
"virsh shutdown kvm1" did not shutdown at all. virsh lists guest as running.
"service libvirt-guests stop" did not shutdown in 280 seconds (shutdown_timeout=300. on_shutdown=shutdown)
"shutdown now" from within guest, guest becomes unreachable.