First of all, sorry for my english...

I have a tv box mecool bb2 pro, and i´ve been testing many roms from the russian foro of bb2 pro.

I always use the double male usb cable to PC to install img format custom firmwares, and i´ve noticed that my tvbox now only can select 60hz screen modes (1080,720 and 480).

My tv is 4k, the hdmi cable is 2.0 version...etc

Somebody know why this happens???

How could i fix it??

Any help will be good¡¡¡

PD: now i use the tx9 firmware, the only one i´ve found in arm64 system. Works well but I wish I could use 4k modes.