I am runnng the dreamcatcher v3.03 board with armbian OS. I almost always ssh to access the machine. The on-board display (tty1) just sits there showing the login request; with no keyboard connected this is just a waste. Is there a way to control the display brightness (power) for the onboard display?
you can control it with the standard bl_power attribute in sysfs.
look for the “fb_ili9341” node in /sys
find /sys | grep fb_ili9341
and under this node locate the bl_power attribute. Writing a ‘0’ to it enables the backlight and writing a ‘1’ disables the backlight.
If you never use the display, it might be simpler to just remove it.