Computer hangs during reboot/halt

[Jun Inoue]

Binary package hint: network-manager

This bug is probably related to bug #274995 (which was closed on 2008-12-03), but I'm opening a new one following Michael Rooney's kind advice.

I'm running a default install of Xubuntu 9.0.4 on a Sony Vaio VGN-G2.

Problem: the system hangs during reboot or halt if there is an active wireless connection. During reboot, I get the following message

 * Stopping anac(h)ronistic cron anacron
acpid: exiting

nm-system-settings: SCPlugin-Ifupdown: devices removed (udi: /or/freedesktop/Hal/devices/net_00_1a_80_d6_06_5a)
nm-system-settings: SCPlugin-Ifupdown: devices removed (udi: /org/freedesktop/Hal/devices/net_00_1f_3c_85_77_4a)
nm-dispatcher.action: Caught signal 15, shutting down...

The first line is sometimes different, but I can't seem to get the alternative message at the moment.
The system makes no further progress. For halt, the message is just "acpid: exiting\n\n", or sometimes it's just blank.
The system is not completely frozen; the Enter key advances the cursor and the console is blanked after inactivity (and lights up again in response to a keystroke). Ctrl+Alt+Delete seems to be registering---it doesn't cause the system to make progress but after repeatedly pressing the combination, I see "init: control-alt-delete respawning too fast, stopped".

The reproducibility is not 100% although it's fairly high, well over 50% (subjectively; I didn't acutally count).

The problem seems to go away if I link /etc/init.d/NetworkManager from rc0.d and rc6.d. (But please bare in mind this is a nondeterministic bug.) I used the prefix K88 immitating Debian, but perhaps a different number is more appropriate for Ubuntu.

[Alexander Sack (asac)]

do you have any remote shares mounted? does the problem also go away if you unmount those before shutting your system down? what type of remote shares are you mounting how?

[Brion Swanson (brions)]

This seems to be exactly the same thing as bug #302452, so I've marked it as a duplicate.