Then you have done something wrong. After copying the camera-ui to /usr/bin, and before rebooting check that the file is indeed there ls -l /usr/bin/camera-ui and that the camera-ui is working The reflash wasn't necessary: Just in case this happens again. set no-lifeguard-reset with the flasher utility: flasher-3.5 --enable-rd-mode --set-rd-flags=no-lifeguard-reset This will prevent the reboot loop. Then, fix the camera-ui binary and after that remove the flag: flasher-3.5 --disable-rd-mode --clear-rd-flags=no-lifeguard-reset