ADB unable to connect my Nexus 7 on Ubuntu

Question

I want to be able to connect my Nexus 7 in order to test my applications from Eclipse on the physical device.

I followed this Google guide.

My /etc/udev/rules.d/51-android.rules file contains this :

SUBSYSTEM=="usb", ATTR{idVendor}=="18d1", ATTR{idProduct}=="4e42", MODE="0666"
SUBSYSTEM=="usb", ATTR{idVendor}=="18d1", ATTR{idProduct}=="4e40", MODE="0666"
SUBSYSTEM=="usb", ATTR{idVendor}=="18d1", ATTR{idProduct}=="4e41", MODE="0666"

The device is configured to use "Camera (PTP)" and "USB debugging" is checked too.

But adb devices lists no device.

What have I missed ?

Answer 1

This answer might be temporary. I'll see if I delete the whole question or if I feel it might be useful...

The fact that the "Connected" message only appeared sometimes and that lsusb was unable to detect the Nexus casted a doubt on the cable.

I just tested with another cable and it works. My other cable seems to have a damaged connector.