As stated in the question, I tried to do different things, such as rebooting the PC and tablet, but nothing happened.
I also tried disabling the "developer options" on my device and then turning it back on, but again, no luck.
It may be useful to restart the ADB server with the following commands (via terminal):
[user]$ adb kill-server [user]$ adb start-server (or adb devices)
Or from within an eclipse:
- Open perspective DDMS
- Click on the drop-down menu next to the camera
- Click "restart adb"
In the end (a few hours later), after some reboots and tricks, such as ADB, I managed to recognize my device
user2340612
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