Hi, I was browsing on the net and found this link:
http://ubuntuforums.org/showthread.php?t=2008576 . I think my problem is
related to the "freezing plymouthd" that does not get killed on
rebooting or shutting down.
As instructed in the link, I put a bash script which content was:
#! /bin/sh
ps -Af >> process.log
in /etc/rc6.d before the "S60umountroot" script file. I opened the
"process.log" file in root directory and find this:
root 2842 2 0 18:27 ? 00:00:00 [kworker/0:3]
root 2854 1 1 18:27 ? 00:00:00 /sbin/plymouthd --mode=shutdown
root 2890 2 0 18:27 ? 00:00:00 [kworker/u:0]
I did the first solution on the link. What I did was:
1. I renamed the file of "S60umountroot" that is in /etc/rc6.d and /etc/rc0.d
to "S61umountroot".
2. Created a file named "S60perso-script" and set it to be executable in
/etc/rc6.d and /etc/rc0.d .
The content of the "S60perso-script" was as follows:
#! /bin/sh
### BEGIN INIT INFO
# Provides:
# Required-Start:
# Required-Stop:
# Should-Stop:
# Default-Start:
# Default-Stop: 0 6
# Short-Description: Kill freezing plymouthd
### END INIT INFO
PATH=/usr/lib/lightdm/lightdm:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
case "$1" in
start)
killall -9 plymouthd
;;
restart|reload|force-reload)
;;
stop)
killall -9 plymouthd
;;
*)
;;
esac
:
{Source: http://ubuntuforums.org/showthread.php?t=2008576 }
That's it! And, the "mount:/ busy message" does not appear again on
shutting down or rebooting. And I think the problem was not in upstart.
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https://bugs.launchpad.net/bugs/1019347
Title:
A message: "mount: / is busy" appears every time shutting down or
rebooting.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/upstart/+bug/1019347/+subscriptions
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