I connected my DLP2000 to my Raspberry Pi 3 B+ and I’m trying to set the resolution to the native resolution (640x360). I’m running Raspbian and I can surprisingly see in Raspberry Pi configuration that the resolution is the “Default 720x480” although I can see that a “854x480” image fits perfectly in the screen (without stretch).
When I run the command “xrandr”, I see this message: "xrandr: Failed to get size of gamma for output default ". So, I can’t change the size: “Screen 0: minimum 854 x 480, current 854 x 480, maximum 854 x 480” (???)
Nothing to do running “cvt 640 360” and “xrandr --newmode” with the parameters that cvt gives me (I get the same message: Failed to get size of gamma for output default).
I’m trying to change the resolution of 854x480 to the native resolution of 640x360, because I have to project the real pixels that the projector has, with no interpolations by the operating system. Is there a way to do that?