I've installed my Ubuntu11.10 yesterday. I updated it and now when i go to shutdown it stucks at Ubuntu logo (the one with the white small balls). I waited 20 mins and nothing, i always have to shutdown by holding the power button. Any suggestions? Thanks :)
As I noted in comment, in my case it was related to bug 875959, so a network-manager issue.
Try this command before shutting down:
sudo service network-manager stop
Worked for me.
Having this problem also very rarely. Seems it shows up after certain updates have been installed. If it happens, I'm just giving it some time just to be on the safe side (took a long time for the first shutdown after installing gnome3/gnome-shell), then I reboot with Alt Sysreq REISUB . Next shutdown(s) are usually fine again after that.
Same problem here.
network-manager won't help.
It is maybe related to an
rpcbind issue (https://bugs.launchpad.net/ubuntu/+source/rpcbind/+bug/844317?comments=all)
as on shutdown I get:
rpcbind: rpcbind terminating on signal. Restart with "rpcbind -w"
Sometimes the kernel fail to kill all remaining processes, some other times it succeeds, however the system is not powered off and I need to either hold the power off button or press
Alt+SysRq+B to reboot.
Happens to me sometimes. It might have been a coincidence, the way I solved it, but when I took the computer from my room to the living-room and then back again, when I unplugged the power supply, I accidentally touched the power supply cord's end. I got a nasty shock... My hand was feeling a bit numb. The cord's end is the two metallic pins you plug onto the socket.
Strangely, when I turned the computer on, worked a bit and turned it off, I was with my finger on the shutdown button, thinking that I would have to manually shut it down.
4 seconds later, the computer shutdown.
Conclusion: It might be that your computer is overcharged with electricity. I do not know if it is healthy to discharge it like I did, though; poor hand of mine :(