LG G2 - USB debugging disables when I connect to a PC I'm trying to set up remote debugging on my brand new LG G2 phone.

Seen here: http://www.html5rocks.com/en/tutorials/developertools/mobile/

So far, I've:


Enabled developer options
Enabled "USB debugging" on the Developer options screen
On the "PC Connections" screen - I've set "USB connection method" to "PC Software"


So - everything looks good at this point.

However, as soon as I connect the device to my PC, the "USB debugging" setting on the "Developer options" screen turns gray (disabled). If I go to DevTools on Chrome on my PC (chrome://inspect/#devices) and check "Discover USB devices", my phone is not listed.

What else do I need to do?
The PC Software setting is just for installing and using the LG PC software. Once your drivers are installed, enable USB Debugging, plug it in, change it from "charge only" to "MTP" and USB Debugging should work.