Ubuntu 16.04: screen unlock fails if my phone is plugged in?

[Grizzly]

03 March 2017  at 11:01, Paul Smith wrote:
Ubuntu 16.04: screen unlock fails i (at least in part)

Any chance you setup Pam to use that phone as a key?

>I've been having this weird problem where _sometimes_ when I try to
>unlock my screen I enter my password and hit ENTER and it just hangs
>forever.  Other times it works fine.  Ubuntu 16.04.2.
>
>I had figured out a workaround that avoided having to kill my session:
>if I use C-A-Fn to get to another (graphical) login screen and log in
>as another user (I had a test user account on the system), then use the
>"Switch User" option to switch back to my first session, it unlocks my
>screen.
>
>However yesterday I found a smoking gun: it turns out this only happens
>if my phone (Nexus 5 / Android) is plugged into my computer's USB port
>(done to charge the phone).  If I unplug the phone then I can log in.
>
>Does this ring any bells with anyone or does anyone have any thoughts
>about where to look for logs, config settings, etc. that might be
>involved?  Google doesn't help me much.
>
>Now that I know what it is it's not such a big deal to work around it,
>but it's still annoying.
>
>Cheers!
>
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