Unable to modify AVR's EDID (I could previously)

[ashlar]

Nothing. I have tried every possible combination of drivers, reinstalling every time from scratch through DDU. If I apply custom resolutions through CRU, black screen and safe mode to recover. I have tried to changing resolution to one untouched by modifications before restarting. Nothing changed. Yesterday afternoon I had applied settings and restarted more than twenty times, while fine honing refresh rates. Then, all of a sudden, it was impossible to do it. What I don't understand is how this could be happening when I uninstall everything through DDU and start from scratch. It doesn't make any sense.