How to get my bbb to work with my vga monitor?

I try:

  • Type export XAUTHORITY=ls /var/run/gdm/auth-for-root-*/database and hit enter.
    Type export DISPLAY=:0.0 and hit enter.
    Type xrandr --output HDMI-0 --mode 720x480 --rate 60. You can substitute different resolutions and refresh rates if you like. Hit enter.
    and on uENV.txr

  • video=HDMI-A-1:640x480@60

both didnt work.

I want to know if anyone manage to solve this problem without a hardware hacking.