View source for Ubuntu 11.04 64 bit hangs at shutdown

[[Category:Ubuntu]]
[[Category:Ubuntu System]]
[[Category:201110]]
Ubuntu 11.04 64 bit

Ubuntu 12.04 64 bit (LTS)
Intel® Core™ i5 CPU 650 @ 3.20GHz × 4 

== Boot and shutdown sequence ==

About runlevels:
* http://www.debian-administration.org/articles/212

Run-level scripts are located here:
* /etc/init.d

Scripts for the different run-levels should 'link' to the scripts in /etc/init.d. They are located here:
* /etc/rc0.d - ''shutdown,halt''
* /etc/rc1.d - ''single user''
* /etc/rc2|3|4|5.d - ''full, multi-user (default)''
* /etc/rc6.d - ''reboot''

Scripts are alphabetically executed when changing to a new run-level and are named as follows:
* [K | S] + nn + [string] 

Where S~ with a parameter 'start' and K~ is run with a parameter 'stop'.

For example:
* K99_umountUSB.sh

== Analyse sendsigs to find hangup point ==

The 'sendsigs' script will send the kill signal (-15) to all remaining processes. Processes have up to 5 minutes to close before they are forced to end (-9).

NB: Be very careful editing the file sendsigs.

<syntaxhighlight lang=bash>
#backup
sudo cp /etc/init.d/sendsigs /etc/init.d/sendsigs~
#edit
sudo gedit /etc/init.d/sendsigs
</syntaxhighlight>

== Modify grub configuration to show log messages ==

<syntaxhighlight lang=bash>
sudo gedit /etc/default/grub
</syntaxhighlight>

<blockquote>

Change:

<syntaxhighlight lang=bash>
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
</syntaxhighlight>

to:

<syntaxhighlight lang=bash>
GRUB_CMDLINE_LINUX_DEFAULT=""
</syntaxhighlight>
</blockquote>

<syntaxhighlight lang=bash>
sudo update-grub
</syntaxhighlight>

== Unmount TrueCrypt volumes at reboot and shutdown ==

About run levels: 
<!-- run-level run level -->
* http://www.debian-administration.org/articles/212

<syntaxhighlight lang=bash>
sudo gedit /etc/init.d/umounttruecrypt.sh
</syntaxhighlight>

<blockquote>
<syntaxhighlight lang=bash>
#!/bin/sh
. /lib/lsb/init-functions
RET=1
if [ -f /usr/bin/truecrypt ] ; then
  log_daemon_msg "Stopping" "TrueCrypt"
  /usr/bin/truecrypt -d
  RET=$?
else
  log_failure_msg "TrueCrypt not found"
fi
log_end_msg $RET
exit $RET
</syntaxhighlight>
</blockquote>

<syntaxhighlight lang=bash>
#make executable:
sudo chmod +x /etc/init.d/umounttruecrypt.sh

#execute at reboot:
sudo ln -s /etc/init.d/umounttruecrypt.sh /etc/rc0.d/K99umounttruecrypt.sh

#execute at shutdown:
sudo ln -s /etc/init.d/umounttruecrypt.sh /etc/rc6.d/K99umounttruecrypt.sh
</syntaxhighlight>

= Archive =

== Modem-manager fails to shutdown signal 15 (failed) ==

* https://bugs.launchpad.net/ubuntu/+source/netbase/+bug/903825

Change the shutdown sequence to fix this:

<syntaxhighlight lang=bash>
sudo mv /etc/rc0.d/S31umountnfs.sh /etc/rc0.d/S05umountnfs.sh
sudo mv /etc/rc6.d/S31umountnfs.sh /etc/rc6.d/S05umountnfs.sh
sudo mv /etc/rc0.d/S35networking /etc/rc0.d/S15networking
sudo mv /etc/rc6.d/S35networking /etc/rc6.d/S15networking
</syntaxhighlight>

== ACPI off (failed) ==

Modify grub configuration as above to turn off ACPI (Advanced Configuration and Power Interface)  at boot.

<blockquote>
<syntaxhighlight lang=bash>
GRUB_CMDLINE_LINUX_DEFAULT="acpi=off"
</syntaxhighlight>
</blockquote>

== shutdown umount script (failed) ==

Add the pre-stop script to /etc/init/dbus.conf before 'exec'

<syntaxhighlight lang=bash>
sudo gedit /etc/init/dbus.conf
</syntaxhighlight>

<blockquote>		
<syntaxhighlight lang=bash>
pre-stop script
   trap "TERM signal" TERM
   /bin/umount -a -t cifs -f -l
   trap - TERM
end script
</syntaxhighlight>
</blockquote>

== Update ATI driver (failed) ==

For ATI Radeon HD 5700 Series, go to www.ati.com to download latest.

<syntaxhighlight lang=bash>
sudo sh ./ati-driver-installer-11-6-x86.x86_64.run --buildpkg Ubuntu/natty
sudo dpkg -i fglrx*.deb
</syntaxhighlight>

== Notes ==

At shutdown or restart the computer may or may not hang.
* doing a shutdown from the desktop will logout instead most of the times (9 out of 10) and show the login screen
* shutting down does not complete, sometimes a trace shows up that mentions FGLRX (ATI proprietary video driver), it does not timeout, it keeps hanging indefinitely
* seems to be happening more often when a truecrypt partition is mounted
** https://wiki.archlinux.org/index.php/TrueCrypt#Safely_unmount_and_unmap_volumes_.28on_shutdown.29

Suggestions and reports:
* (20120619) http://forum.ubuntu-nl.org/installatie/pc-sluit-meestal-niet-af-!/
* (20121107) http://forums.linuxmint.com/viewtopic.php?f=90&t=101548&p=577156&hilit=mint+black+screen
* http://www.brighthub.com/computing/linux/articles/39504.aspx
** ACPI (Advanced Configuration and Power Interface)
* https://bugs.launchpad.net/ubuntu/+source/samba/+bug/211631
* https://bugs.launchpad.net/ubuntu/+source/linux/+bug/577897 (expired)
** seems ACPI related, "with the latest kernel (2.6.34-999-generic #201005121008), it works"
* https://bugs.launchpad.net/ubuntu/+bug/613897
** "I finally managed to fix the problem by removing the acpi=off from my grub kernel options... I had a look at '/etc/init.d/halt' script, I noticed that in case of shutdown, it called the /etc/init.d/ups-monitor which was not installed..."
* https://bugs.launchpad.net/ubuntu/+source/linux-source-2.6.22/+bug/126140 (2007)
** "created an init.d script to run at shutdown. All the script does is remove the snd_hda_intel module at shutdown (rmmod snd-hda-intel) and things work smoothly. See this thread for more detail: http://ubuntuforums.org/showthread.php?t=500268 "