Subject: Re: bug#23286: Unable to unlock xscreensaver in Xfce

From: Danny Milosavljevic <[email-masked]>
Date: Sat, 23 Apr 2016 09:55:09 +0200

On Thu, 14 Apr 2016 18:50:32 +0200
[email-masked] (Ludovic Courtès) wrote:
> As Chris Webber mentioned on the mailing list (IIRC), you’ll also have
> to enable xscreensaver in the OS config:
> 
>   (use-modules (gnu services xorg))
> 
>   (operating-system
>     ;; …
>     (services (cons (screen-locker-service "xscreensaver")
>                     %desktop-services)))

guix system: error: failed to load '/etc/config.scm':
gnu/services/xorg.scm:442:41: In procedure screen-locker-service:
gnu/services/xorg.scm:442:41: In procedure struct_vtable: Wrong type argument in position 1 (expecting struct): "xscreensaver"

To fix, use

   (use-modules (gnu services xorg))
   (use-package-modules .... xdisorg)

   (operating-system
     ;; …
     (services (cons (screen-locker-service xscreensaver)
                     %desktop-services)))

(i.e. without the doublequotes)