Problem: Black screen when resuming from suspends
It's really annoying and frustrating when using a laptop. I wish Ubuntu already had already solved this problem.
Cause: compiz! (to figure out do a simple test: disable compiz before entering standby and you should be perfectly able to resume)
Solution1: install via apt-get CompizConfig ### I haven't tried yet
then in General Options go to Display Settings and disable Sync to VBlank
Solution2: disable Compiz in Ubuntu 8.04 ### It works on my laptop - HP 8710w
System->Preferences->Appearance->Visual Effects and set them to None.
If problem persists also try changing some values in /etc/default/acpi-support
most notable change should be changing POST_VIDEO=true to POST_VIDEO=false
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