MM is running on a Pi with it’s own screen.
But in the meantime I got it working again. I found this threat with had similar errors as I had when running ‘startx’.
After I removed this driver MM started again:
sudo mv /usr/share/X11/xorg.conf.d/99-fbturbo.conf ~
But I do still have the following errors in the error-log:
[16183:1013/103255.149031:ERROR:viz_main_impl.cc(186)] Exiting GPU process due to errors during initialization
[16220:1013/103256.721936:ERROR:gpu_memory_buffer_support_x11.cc(44)] dri3 extension not supported.
[16188:1013/103256.801401:ERROR:command_buffer_proxy_impl.cc(126)] ContextResult::kTransientFailure: Failed to send GpuControl.CreateCommandBuffer.