Thank you sooooo much Joseph W.  My Toshiba was crashing - thank you for
the layman terms for us noobs.

Using Comments #50 and #54 I did the following to prevent the freezes on
my Packard Bell MZ35

I created an empty file by right clicking on the desktop and choosing "Create 
Document" and then "Empty File"
Then I gave the file the name

pcie_aspm

I repeated this to create another empty file called

wireless

The two files were be copied to the folder /etc/pm/power.d

I started the terminal with the command ctrl-alt-T
navigated to the Desktop folder with

cd Desktop

and pasted in this command

sudo cp pcie_aspm /etc/pm/power.d

followed by

sudo cp wireless /etc/pm/power.d

Once this had been done I pulled out the power lead and found my laptop no 
longer crashed.
I think a restart is necessary as within an hour my computer performed a 
bizarre reboot that must have been caused by confusing the pm-utils
I have had no such crashes since.

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https://bugs.launchpad.net/bugs/656745

Title:
  notebook always crashes if on battery (dell vostro 3700 and others)

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