Questo è quello che succede:
C:\adb>adb devices
List of devices attached
FA********** device
C:\adb>adb shell
root@m7:/ # chmod 666 /system/etc/elementalx.conf
chmod 666 /system/etc/elementalx.conf
Unable to chmod /system/etc/elementalx.conf: Read-only file system
10|root@m7:/ # adb remount
adb remount
* daemon not running. starting it now on port 5038 *
* daemon started successfully *
error: device not found