Bug#809322: mpv: Complains about missing xdg-screensaver, which is installed

[Ralf Jung]

Hi,

> Try running
> 
> xdg-screensaver reset
> echo $?
> 
> in the console and make sure an echo outputs a 0. If not the script is
> supposed to fail.

It prints "4". So you are right, it fails (and the error message shown
by mpv could certainly need some improvement). That's not very
informative, though...

Kind regards,
Ralf