Frequently Asked Questions

1. Adb devices shows “no permissions”

It’s possible, on new machines, that adb devices cannot access the board:

List of devices attached
C8631473CC6F        no permissions; see [http://developer.android.com/tools/device.html]

To fix this, add the following udev rules in /etc/udev/rules.d/70.khadas_vim3.rules:

# adb access
SUBSYSTEM=="usb", ATTR{idVendor}=="0451", ATTR{idProduct}=="4e40", MODE="0660", TAG+="uaccess"

Then reload the udev rules with:

sudo udevadm control --reload
sudo udevadm trigger

For the same reason as adb (udev), fastboot flashing might fail as well.

To fix this, add the following udev rules in /etc/udev/rules.d/70.khadas_vim3.rules:

# fastbootd access
SUBSYSTEM=="usb", ATTR{idVendor}=="18d1", ATTR{idProduct}=="fada", MODE="0660", TAG+="uaccess"