Hot answers tagged sleep-wake
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I had the same exact issue with my MacBook Pro and I have rEFInd installed as well. I resolved the problem disabling the autopoweroff option with pmset. See this answer.
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If you want to prevent Macbook going from sleep mode into standby mode (dump RAM to SSD) too soon, you could also adjust by changing pmset's standbydelay value.
sudo pmset -g to check current setting
sudo pmset -a standbydelay [value] to update settting
But instead of changing pmset configuration (which affects your battery life), try using the original ...
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I'm guessing the 2nd display is not an Apple display.
I believe what is happening is that the display is, in fact, going to sleep, but in such a way that the Mac thinks it has been powered off.
Replacing the HDMI --> DVI converter with an Apple Thunderbolt --> DVI converter is your best bet at fixing this.
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In System Preferences under Energy Saver, is there a check in the checkbox for Enable Power Nap while plugged into a power adapter?
If so, then this is possibly why your iMac is waking up. The description of Power Nap in System Preferences says: "While sleeping, your Mac can back up using Time Machine and periodically check for new email, calendar, and ...
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I found an easy way around this and I hope it helps people. I tried resetting the NVRAM and it did not help. I am pretty sure it is due to flaw in the OS upgrade.
Here is the fix. Set up video so that when you move to the top left corner, the video shuts off. When you come out of sleep, if the resolution is low, move the mouse to the top left to shut ...
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