[Bug 20282] Full system crash after normal shutdown (no problems after hard reset)

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http://bugzilla.ubuntu.com/show_bug.cgi?id=20282
Ubuntu | UNKNOWN





------- Additional Comments From nkoren at gmail.com  2005-12-02 08:13 UTC -------
Got some more info for you.  After going through several shutdown cyles, I was
able to glean the approximate text that's coming up.  It looks roughly like this:

Deactivating swap :
     unmount: tmpfs busy -- remounting read only

Unmounting local file systems :
     unmount: tmpfs busy -- remounting read only

Based on this text, I Googled around and found this page, which seems to
describe a bug that's causing a number of shutdown problems on laptops.:

Mine is a desktop system, but I figured that it was worth trying the fix that
varunus posted on 29 Nov 2005.  I changed my /boot/grub/menu.lst from:

title Ubuntu, kernel 2.6.12-10-386
root (hd0,0)
kernel /boot/vmlinuz-2.6.12-10-386 root=/dev/hda3 ro quiet splash
initrd /boot/initrd.img-2.6.12-10-386
savedefault
boot

to:

title Ubuntu, kernel 2.6.12-10-386
root (hd0,0)
kernel /boot/vmlinuz-2.6.12-10-386 root=/dev/hda3 ro quiet splash reboot=h
initrd /boot/initrd.img-2.6.12-10-386
savedefault
boot

(Notice the added "reboot=h" on the third line).  After making this change, my
system *appears* to be working, although it also appears that the unmount
problem is still occurring during the shutdown.  I have searched for this issue
in the bug database, and it doesn't appear to already be there (although I am a
novice, and might not be finding it), so I'll leave this as unresolved.  If I
can confirm that the problem is gone, or if it comes back, I will let you know.

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