I made two tests.

1) I tried with an iso image of Ubuntu 10.04.4 amd64 as a live USB stick

The system booted up but it did not detect the right screen resolution. It 
opened the desktop with 1024x768 instead of 1366x768. I guess there might be 
some problem with older radeon drivers when trying to detect a new AMD video 
chip.
I then suspended the system, trying to resume after some seconds and obtained 
the usual black screen. Black screen also after switching the system off and on 
again. Usual fix by removing the battery.

2) Upstream kernel 3.7.0-030700rc5-generic

This time I removed the fglrx driver and used the radeon driver instead.
After suspend, resume was a little less disastrous. Well, this time the screen 
didn't remain completely dark. The retro illumination was on, with the screen 
dark and some flashing white rows appearing from time to time. The keyboard 
wasn't completely unresponsive: Ctrl+Alt+F1 as an attempt to have a console 
didn't work, but I was able to reboot the system regularly with Ctrl+Alt+Canc.
After reboot, the usual bios ASUS welcome image appeared but then the screen 
became black with a blinking cursor on the top-left corner of the screen.
Switching off and on the laptop produced a blinking cursor again. Battery 
removal restored the system as usual.

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https://bugs.launchpad.net/bugs/1076103

Title:
  [Asus Eee PC 1215B] Resume doesn't work after suspend

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