bookworm vs trixie discussion for mobian in pinephone regular.

[Kevin Kofler]

The GPU driver on the PinePhone supports neither OpenGL ES 3 nor Vulkan, so GTK 4.18 supports it only with software rendering. That does not initialize an OpenGL context, so Megapixels, which uses OpenGL, does not work. (Other GTK applications will usually work, but be painfully slow.) So you need a GTK patched to support OpenGL ES 2.

All the code is out there in my GTK fork, you just need to compile and/or package it.