running 11.10 and on wake up after being suspended (for a long time or 2 seconds, doesn't matter) I am presented with a black screen that just has a purple bar (about the size of the top menu bar). As far as I can tell the system is unresponsive to anything outside of a manual restart by pressing the power button on the tower, after which it starts normally. using the most up to date graphics driver, also tried switching to a different version, nothing.
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The black screen error
If you found such error, you can just shake you mouse one or two times, the black screen goes away and come the login session.
This might occur because of the Power Management setting you have changed or by the default setting.
When there is no activity in the system for 1 hour or so(this is based on Power Management setting) ... This might occur.
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It could be Power Manager related, see my answer Why is wireless down/strange after switching to battery or closing/opening the lid?
Power Manager is also invoked for suspend/resume, so the answer should help.
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