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Cannot transfer files anymore from my Galaxy Nexus through USB

Last friday, I tried to hook up my Galaxy Nexus phone through USB to transfer some files to my computer. After a few seconds, a completely empty Nautilus window appeared. Once again, Ubuntu was incapable of detecting my device. This happened a few versions ago and I had to use obscure and impossible to remember MTP commands to perform transfers. I didn’t want to search for these commands again, tired of loosing more and more time with artificial problems. If Ubuntu degrades at this point from one version to the other, I will be better off switching to Windows and install Linux only in virtual machines. This is not the only issue I got and most bugs (mouse pointer, Emacs, M-Audio sound stability) persist with version upgrades. Canonical now seems to focus on Mir and newer Unity versions, which I really dislike because Mir will break everything down for five or six versions. Either this, or Canonical will cut corner on keyboard accessibility, resulting in a UI that will be almost unusable for me. I exptect this will  be my hardest Linux time ever when that beast comes out, until it stabilizes.

However, my actual bug was worse than this: the phone didn’t connect through Windows as well! When I plugged in my phone on a Windows machine, an empty Explorer window similar to below comes up and nothing else. Does that mean my phone is dying, progressively loosing functionalities? Probably.

Capture d'écran 2014-11-30 09.04.15

I didn’t atempt any Google search about this. It is worthless. I will find forum posts about people replacing the cable, doing factory resets, sending their phone for repair or replacement, etc. The phone hooks up, something is detected by the computer, so why a new USB cable would help? Yes, I can do factory resets after factory resets, that will probably fix it, but what’s the point of doing this if I know I will have to redo it a few months later, for no reason, unless I install NOTHING on the phone? And how I am getting through technical support are no-go solutions or offers for a new phone that will force me to switch to a more expensive plan with my provider or buy something from nowhere with an old version of Android.

Before accepting this conclusion and starting to look if I could get a Google Nexus phone from Google rather than going through Fido and affecting my phone/data plan or get something somewhat correct from DX.com, I tried with a different cable: same effect. Then I saw the home screen on the device and remembered I set up a PIN recently to protect my Google account for any tampering by somebody who may get back my phone if I loose it, or steal it from me.

Screenshot_2014-11-30-09-03-22

I entered my PIN and saw with surprise and relief the following window on my computer:

Capture d'écran 2014-11-30 09.05.34

Tada! This time, the solution was simple! This was just a normal data protection! So my USB connection is still working!

Note that locking the phone doesn’t shut off the USB access, until the cable is disconnected. The PIN also doesn’t prevent me from answering a call, so this is not as problematic as I feared it would be.