@biolyasser: I installed Sabayon 14.04 "minimal" version, restore still
did not work. It was running just fluxbox. I had to use "echo mem >
/sys/power/state" since other ways to suspend (like pm-suspend) were not
there. It did suspend but resumed to black screen as usual, except this
time it had an underscore char showing in the upper left. It was a 3.14
kernel.

I am using nvidia, and have found no difference between nouveau and
nvidia drivers as far as the bug goes.

This problem could be kernel related. For example, on debian wheezy (3.2
kernel) which doesn't have the bug, if I install the backported 3.13
kernel, it will now have the bug. Most of the "action" about
suspend/restore bug(s) is on the kernel.org bug site.

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https://bugs.launchpad.net/bugs/1283938

Title:
  Ubuntu 14.04 blank screen after wakeup from sleep

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