debugging output issues

• Upload some details about your video driver using the instructions here: https://drmdb.emersion.fr/
  • (not technically required, just to keep the database up to date)
• Install libdrm-tests and run modetest, attach the full output of that
• run:

  echo 0x1FF | sudo tee /sys/module/drm/parameters/debug # Enable verbose DRM logging
  sudo dmesg -C # Clear kernel logs
  dmesg -w >dmesg.log & # Continuously write DRM logs to a file, in the background
  flutter-pi ... # Run flutter-pi again, manually terminate it after a few errors have happened
  fg # Kill dmesg with Ctrl+C
  echo 0 | sudo tee /sys/module/drm/parameters/debug # Disable DRM logging

• and attach the dmesg.log file