Comment 68 for bug 882817

I have this problem on a clean install of 11.10. AMD Sempron on Biostar 790 mobo. I installed 11.10 from a live CD of about a month ago, it worked fine, then updated and the problem appeared.

The machine sticks at the Kubuntu shutdown splash with the "balls" active, nothing else happens. I can't get a terminal or response to any key presses, but sometimes ctrl-del will bring up a full screen activity log. Usually (not always) it's stuck at trying to shutdown modem-manager with signal 15, there is [fail] in red on the RHS against it. More random pressing of ctrl-del or ctrl-alt-del gets it moving again, line at a time, until eventually it shuts down, BUT, it always reboots. No combination of shutdown -h -P -r now makes any difference, it ALWAYS reboots.

I tried to kill modem-manager with sudo kill (process ID) before shutting down, but it wouldn't die.

The only way to turn of the machine is the power switch, or sudo poweroff --force