If anyone is after a get-around while waiting for a fix, this works for
me ...

In /etc/X11/, copy xorg.conf.failsafe to xorg.conf
I understand that this causes Ubuntu to use a old lower-functionality 'vesa' 
driver.

Some of the xorg.conf file ..
Section "Device"
        Identifier      "Configured Video Device"
        Driver          "vesa"
EndSection
  :  :

(This may not be necessary ? ..)
I also modified a line in /etc/default/grub, adding the 'nomodeset' option ..
GRUB_CMDLINE_LINUX_DEFAULT="quiet nosplash nomodeset"
and ran 
sudo update-grub

My system is stable using this driver, but I can't use Google Earth
because this driver gives too low performance.

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https://bugs.launchpad.net/bugs/660405

Title:
  computer freezes on suspend/hibernate

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