[Q] miui - black screen when unlocked

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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?

seems its only me having this problem since not getting any replies... really no one having such an issue? or even anything similar?

As far as I can tell from reading the forums, it's a common issue, regardless of ROM, kernel, etc.

So what do we take from here, there is no definite solution for this problem? Not even someone trying to find the cause?