I have a Samsung A3 with Android 4.4.2 (not rooted) and a computer running Ubuntu 14. I am trying to connect my device to my computer through USB to be able to perform some tests on it.
I have activated the USB debugging mode.
But when trying the adb devices
command, it keeps telling me the device is "unauthorized". Also, no pop-up appears on the phone which makes it impossible for me to authorize it.
Here is what I have already done:
- I've updated and upgraded multiples times my ADB version
- Installed mtp, mtp-tools;
Configured the USB access for the Samsung in
/etc/udev/rules.d/51-android.rules
:#Samsung Galaxy A3 SUBSYSTEMS=="usb", ATTRS{idVendor}=="04e8", ATTRS{idProduct}=="6860", MODE="0666" GROUP="androiddev", SYMLINK+="android%n"
Even installed the PPA
ppa:langdalepl/gvfs-mtp
(usefull only in Ubuntu 12 and uninstalled it later);- Tried to find and delete some previous
adb-key
file, but there were none. (The device was never connected to that computer before.) - Changed Cables;
- I also tried with a Samsung S5 under Android 4.4.2. The ADB command on those two devices works when on a windows machine.
Do you have any ideas as to why it does not work, or of any thing else to try out without rooting the device?
Thank you for your help.