Okay... when I install a rom all was fine, than before calibration was a half screen only, the upper, the other is was all white, like a half white screen, i see it and think, wtf...
than i think may they says that i need tap to screen for calibration, and yes after taping the screen i see a calibration screen, after cal. i see another half screen, than was auto-install than restarting, and it's ok no white screen. it's similar when you turn off manila, one half of the screen (the down part) is white until you get restart your ppc. Continue to test.