[Q] miui - black screen when unlocked

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http://forum.xda-developers.com – so yeah i often get black screen on my evo ed gsm when unlocked, seems the display is there since i get the vibration when touched at the unlock slider spot, but i dont see it. it doesnt happen always but it happens often. upgraded to 2.11.23 from 2.9.14 but still getting it. have to lock it again and then unlock again in order to see the display. any ideas? (HowTos)