Thanks for your help with this. I also tried that but it didnt help.

Incase this helps anyone in the future i gave up with Recalbox and installed LAKKA Retroarch onto a USB stick, this works perfectly and i had no issues with screen resoltions.

Its a shame as i was hoping that it could solve it using Recalbox but hey, at least my retro project can continue

Thank you for your help. The latoptop screen is smaller than the HDMI TV.

The TV is 1080 and the latop is 768.

The recalbox install is stock default.

So far i have turned off the laptop screen by creating a .xinitrc file and adding:
Xrandr —output LVDS1 —off

This seems to help because when the emulation station screen boots it loads full screen on the TV HDMI.

I’ve checked the mupen64plus.cfg and the values are:
ScreenWidth = 1366
ScreenHeight = 768

I changed these to 1920 and 1080 but i still had the same problem. However, on rechecking the file i noticed that they had been reset to 1366 and 768.

I dont know why this happened, do you think this may be whats causing it? Do you think these values are getting reset bu something else (i.e because the laptop is reporting its screen size?)

Running on intel i3 X64 laptop.
Turned laptop screen off using xanda. Display via HDMI only.

ES is correct and full screen. SNES works correctly and displays full. N64 does not display full and is on left hand side of screen.

Can i full screen or at least center N64?

Thank you