Not sure this is the same bug but :

Recent desktop system  (AMD Sempron, NVidia chipset) which was shutting
down perfectly with Feisty now sporadically hangs on shutdown after
upgrade to Gutsy (kernel 2.6.22-14-generic).

Not easy for me to be very specific, the machine is 400 miles away, it's
a friend's machine which I administer from remote using SSH and of
course I have no access to it when hanged on shutdown... According to
the reports I got from her, machine stays forever on shutdown splash
screen and nothing else happens. I have remotely deactivated the splash
screen in grub's menu.lst to see if it can help or check last system
messages from now on.

Syslog doesn't show anything special after such a hang.

She reported to me having had some filesystem errors reported at mount
time after a forced reboot in such situation, so that's possible that
hanging happens before the system is actually completely down.

Machine uses the NVIdia proprietary X11 driver as well as ndiswrapper +
sis163u driver for a Wi-Fi USB thing and I was suspecting one of them to
be the cause of the issue - I've seen that losing the Wi-Fi connection
sometimes hangs the system in Gutsy where it wouldn't happen in Feisty,
although the "Windows" driver used by ndiswrapper is the same, so I was
suspecting something weird could happen when shutting down networking.

-- 
Gutsy shutdown doesn't
https://bugs.launchpad.net/bugs/119308
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