day by day linux: How to fix hibernate resume in latitude x300 ubuntu karmic

Recently I had problems with one of the main feature I use on my laptop: hibernation.

My old latitude x300 does not resume after a good hibernation !!!

After a period of debugging I can conclude that the reason (which I was not able to heal) is that the swap image of the hibernation was not found from its flag so I decided to use pm-hibernate passing resume=/dev/xxx as a kernel flag:

add resume=/dev/xxx in your grub menu as a kernel option where xxx is the device where you have your swap partition that you can find as follows:

cat /proc/swaps
Filename Type Size Used Priority

/dev/sda5 partition 1959888 0 -1

usually this solve the problem, if not it's a bigger one ;) but anyway I have a workaround as usual quick and dirty one:

install hibernate package: sudo apt-get install hibernate
modify as follows the hal file corresponding to the hibernation : /usr/lib/hal/scripts/linux/hal-system-power-hibernate-linux

from:
# We only support pm-tools

if [ -x /usr/sbin/pm-hibernate ] ; then
  /usr/sbin/pm-hibernate $QUIRKS

  RET=$?
else
   unsupported

fi

to:

# We only support hibernate since pm-tools not resuming
if [ -x /usr/sbin/hibernate ] ; then

   /usr/sbin/hibernate --force
   RET=$?

elif [ -x /usr/sbin/pm-hibernate ] ; then
  /usr/sbin/pm-hibernate $QUIRKS

  RET=$?
else
   unsupported

fi