I have installed gMTP and tried to follow this tutorial to solve this problem:
http://www.webupd8.org/2013/01/upgrade-to-gvfs-with-mtp-support-in.html
But neither worked.
I tried to connect both my phone (Nexus 4) and my dad's phone (Galaxy Note 2), and neither is being detected by Ubuntu. They don't show up on my files and on gMTP.
Is there another fix? or something more specific for Android 4.3 and Ubuntu 14.04
Best Answer
I had the same problem this fixed it:
Once that's installed, plug in the phone to your computer. If nothing happens, on the phone go to Settings > Storage > Upper Right Corner (⋮) > USB Computer Connection > Media Device.
edit:
Settings > Search (type in "usb") > USB configuration ... If non existent make sure developer options have been enabled.
Once they have been enable and the above package installed, also be sure to have the phone plugged in and then go back into developer options and update the USB configuration as shown in the picture below.