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BSOD 9F - laptop screen won't turn on after sleep
My Dell Latitute E7440 will frequently have a blank screen after going to sleep. When it happens, I can't use the laptop until I turn it off and on, losing all the programs I have open. Two days ago I got a BSOD 9F when trying to wake it up. I don't know that's wrong with the laptop, running WinDBG on the minidump tells me either ntkrnlmp.sys or igdkmd64.sys caused it but I don't have any detail beyond that. Need someone more knowledgeable than I to help me.