bug#23201: GNOME lock screen hotkey doesn't work

[Rene]

Hello,

I think that this bug is solved with commits(master branch):

>From `92deb5cc920fcc7617302986180f1abee5fd2b2` to 
>`48c8d067d4ded776939cda6f9c63c25b38ba77fc`, using the GDM service.



Thank you
Rene