*** This bug is a duplicate of bug 1124803 ***
https://bugs.launchpad.net/bugs/1124803
Max, as I've understood, "no splash" doesn't disable plymouth. Some people
suppose that the freezed plymouth is the cause:
https://bugs.launchpad.net/ubuntu/+source/upstart/+bug/1019347
I've decided to find it out and totally purged plymouth from system. But that
didn't help.
So, what do we have now?
I've modified /etc/init.d/umountroot script (part at 86 line):
=========================
for i in 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
do
mount $MOUNT_FORCE_OPT -n -o remount,ro -t dummytype
dummydev / 2>/dev/null \
|| mount $MOUNT_FORCE_OPT -n -o remount,ro
dummydev / 2>/dev/null \
|| mount $MOUNT_FORCE_OPT -n -o remount,ro
/
ES=$?
# [ "$VERBOSE" = no ] || log_action_end_msg $ES
log_action_end_msg $ES
if [ $ES -gt 0 ]
then
LOG=/mega-log-`date +%s`
echo "`date`: Attempt ${i}: remount rootfs failed! Trying
again..." #| tee -a $LOG
echo "`date`: Attempt ${i}: remount rootfs failed! Trying
again..." >> $LOG
# sleep 1
{ cat /proc/mounts ; echo ; ps aux ; echo ; /usr/bin/lsof
; echo ; } >> $LOG
/bin/fuser -v -m -u / 1>/dev/null 2>> $LOG
sleep 1
else
break
fi
done
=========================
Today's morning I've got a 21 message "/ is busy" at shutdown.
Early, I thought that the cause is that some processes are accessing the disk
during shutdown (writing). Some processes which are not terminated on time, so
" / is busy " message appears.
Now I'm looking into logs and... Well, looks like it isn't the real cause.
I don't see any files opened for writing (except pipe, @/com/ubuntu/upstart,
/dev/null and /dev/console).
So, more and more I think, that this bug is in 'init/upstart'... or in kernel!
It's not so easy to reproduce it. I've tried a lot of times to reboot machine
under heavy cpu and I/O load and bug doesn't apper (a lot of times in about
10-15 minutes).
But bug appears more frequently when uptime is high enough (at least 1/2 of a
day).
Steps to reproduce: push power button from running X session.
One more interesting thing: my root partition is on usb hard drive.
If I'll have some more free time near future, I'll try to test it with a
new kernel ( > 3.5).
** Attachment added: "mega-log-1365656098"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1073433/+attachment/3640749/+files/mega-log-1365656098
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https://bugs.launchpad.net/bugs/1073433
Title:
Ext4 corruption associated with shutdown of Ubuntu 12.10
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