Was able to resolve my resume after suspend issue by disabling KMS.  
Edit the file: /etc/default/grub and replace GRUB_CMDLINE_LINUX="" with 
GRUB_CMDLINE_LINUX="nomodeset"
The bootloader will need to be updated in the terminal using: sudo update-grub. 
This may not be a fix for all graphic cards but for my ATI Radeon 7500, 
suspend/resume is now working perfectly.

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[IBM 2673PXG] Thinkpad X31 suspend/resume failure
https://bugs.launchpad.net/bugs/425264
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