F20 screen lock freezes

[Michael Schwendt]

On Mon, 25 Nov 2013 09:55:27 -0800, Adam Williamson wrote:

> On Mon, 2013-11-25 at 08:45 +0100, Michael Schwendt wrote:
> > Occasionally (and that makes it very hard to reproduce), after I had been AFK I try
> > to log in to GNOME Shell again, but I'm unable to open the screen lock to get to the
> > password prompt. All that's left is to switch to a VC and kill X. I've tried killing
> > gnome-shell, but that doesn't lead to anything.
> > 
> > What could be the cause? Which bugzilla component to choose?
> 
> gnome-shell would be the one I'd go with - Shell does its own screen
> locking these days.
> 
> I think I've read about this being caused by Shell crashing condition
> while it's locked / when you go to unlock, but IIRC they put a change in
> 3.10 that was supposed to 'fix' that. So maybe this isn't the same
> thing.

Just happened again. Monitor woke up, black screen with mouse pointer.
I could move the mouse pointer, but that's all. Switched to VC, ran
debuginfo-install gnome-shell, waited for download. Suddenly, the
screen flickered, and the screen lock's password prompt appeared, but
didn't accept any input (neither mouse nor keyboard). Attaching gdb to
gnome-shell process was a bad idea. It couldn't backtrace anything.