The backlight issue got solved in v.6.1 , that version is already online and downloadable
If u have issues with bootloop , wipe dalvik and data cache and flash vurrut kernel v1
That should solve ur problems
I hope i was able to help you .
blacklight problem still unresolved! always present in versions v6.1!
we expect a solution
miui v5 got backlight problem that I experienced, that time I am on XXKPQ vurrut build 1,
Yesterday I reflashed my device with miui v6 but on XXKPE not on XXKPQ ,
now I have XXKPE with vurrut build 2(cm/miui) , and dont have backlight problem.
My procedure for all the flashing I have done is ,
clean cache -> cclean dalvik cache -> factory reset -> flashed miui_v6 zip file -> reboot to recovery -> clean cache -> clean dalvik -> factory reset