White Screen at Wake
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 SInce installing F.lux some time ago, I have been getting periodically a white screen upon waking the computer from sleep. Any ideas how to fix this issue? 
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 Does this sound relevant to what you're seeing? There have been some known bugs in this area that aren't caused by f.lux: 
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 Thank you for your response. Unfortunately, that does not describe my issue. I'm pretty certain it's being caused by F.lux (or at least while F.lux is open/activated). I ceased to use F.lux for a couple of weeks to discern if this was the case, and the problem didn't occur during that time. Since I've begun to use it again, the issue has returned periodically. 
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 Which OS? This bug existed in Betas of 10.10 but was fixed by GM. 
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 Thank you for your response, herf. I am running 10.10.5. 
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 @jpwg Can you tell me also: what hardware are you using, and are you connected to any external montiors (and which ones)? And any other clues that might help us test. 
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 Thank you, Lorna. I am not using any external monitors. For hardware, I am using an iMac (27", late 2013). Thanks again. 

