The Nokia N900 has to be my favorite handheld device of all time, even more so than the Nintendo Gameboy ;)
I recently discovered PostmarketOS, based on Alpine Linux that intends to be a replacement phone OS with a 10 year lifespan. This also led me to discover that the N900 has mostly mainline Linux Kernel Support.
The one thing I wanted to happen was that the screen powers off when the keyboard slides closed. Which is done by editing
/etc/acpi/handler.sh as such:
KP_SLIDE_OPEN) adjust_keypad_bl 255 echo 0 > /sys/devices/platform/omapdrm.0/graphics/fb0/blank ;; KP_SLIDE_CLOSE) adjust_keypad_bl 0 echo 1 > /sys/devices/platform/omapdrm.0/graphics/fb0/blank
This looks like it would also be the place to do things with the other hardware buttons on the device. More to come on this device!