Raspberry Pi display not autostarting magic mirror

EphraimB

My Raspberry Pi isn’t autostarting Magic Mirror with the 7 inch display connected. It autostarts correctly when connected to a monitor however. Is there something in the pm2 script that I have to do?

EphraimB

@EphraimB I got it to work now. Thank you.

sdetweil

@EphraimB when the 7 in is used open a terminal session ctrl-alt-t

and do

echo $DISPLAY

the line in package.json used for npm start, checks for DISPLAY set in the env, and if not uses :0

this is needed by x-windows

you might need to add

export DISPLAY=:?

to the installers/mm.sh, before the npm start line

where ? is the display number used for the 7in

EphraimB

@sdetweil

/home/ephraimb/.pm2/logs/mm-error.log last 15 lines:
0|mm       | [8401:0722/083808.387458:ERROR:viz_main_impl.cc(186)] Exiting GPU process due to errors during initialization
0|mm       | [8449:0722/083808.554707:ERROR:gpu_memory_buffer_support_x11.cc(44)] dri3 extension not supported.
0|mm       | [8410:0722/083808.663954:ERROR:command_buffer_proxy_impl.cc(126)] ContextResult::kTransientFailure: Failed to send GpuControl.CreateCommandBuffer.
0|mm       | /home/ephraimb/MagicMirror/node_modules/electron/dist/electron exited with signal SIGINT
0|mm       | [8816:0722/083948.777454:ERROR:viz_main_impl.cc(186)] Exiting GPU process due to errors during initialization
0|mm       | [8860:0722/083948.944901:ERROR:gpu_memory_buffer_support_x11.cc(44)] dri3 extension not supported.
0|mm       | [8825:0722/083949.008201:ERROR:command_buffer_proxy_impl.cc(126)] ContextResult::kTransientFailure: Failed to send GpuControl.CreateCommandBuffer.
0|mm       | /home/ephraimb/MagicMirror/node_modules/electron/dist/electron exited with signal SIGINT
0|mm       | [9539:0722/084423.587492:ERROR:viz_main_impl.cc(186)] Exiting GPU process due to errors during initialization
0|mm       | [9583:0722/084423.754159:ERROR:gpu_memory_buffer_support_x11.cc(44)] dri3 extension not supported.
0|mm       | [9546:0722/084423.836816:ERROR:command_buffer_proxy_impl.cc(126)] ContextResult::kTransientFailure: Failed to send GpuControl.CreateCommandBuffer.
0|mm       | /home/ephraimb/MagicMirror/node_modules/electron/dist/electron exited with signal SIGINT
0|mm       | [1692:0722/090756.740898:ERROR:viz_main_impl.cc(186)] Exiting GPU process due to errors during initialization
0|mm       | [1734:0722/090757.250763:ERROR:gpu_memory_buffer_support_x11.cc(44)] dri3 extension not supported.
0|mm       | /home/ephraimb/MagicMirror/node_modules/electron/dist/electron exited with signal SIGINT

^C
ephraimb@raspberrypi:~ $ echo $DISPLAY

ephraimb@raspberrypi:~ $

EphraimB

@EphraimB https://youtu.be/7VVcJsOaJJc

EphraimB

@EphraimB I got it to work now. Thank you.

sdetweil

@EphraimB what did u change?