On Thu, May 06, 2021 at 04:38:58AM +0200, Brendan Tildesley wrote:
> 
> > On 05/05/2021 3:23 PM Ludovic Courtès <ludo@gnu.org> wrote:
> > 
> >  
> > Hi Brendan,
> > 
> > Brendan Tildesley <mail@brendan.scot> skribis:
> > 
> > > * gnu/packages/xfce.scm (xfce4-session):[propagated-inputs]: Add xset so
> > > that xflock4 can turn off the monitor.
> > 
> > Can’t we instead patch ‘scripts/xflock4’ so that it refers to ‘xset’ by
> > its absolute file name?
> > 
> 
> I can. It felt weird just patching one command and not others though.
> 
> > However, my understanding is that the xset code is already a fallback:
> 
> > 
> > --8<---------------cut here---------------start------------->8---
> > # else run another access locking utility, if installed
> > for lock_cmd in \
> >   "xlock -mode blank" \
> >   "slock"
> >   do
> >     set -- $lock_cmd
> >     if command -v -- $1 >/dev/null 2>&1; then
> >         $lock_cmd >/dev/null 2>&1 &
> > 	# turn off display backlight:
> > 	xset dpms force off
> >         exit
> >     fi
> > done
> > --8<---------------cut here---------------end--------------->8---
> > 
> > Probably we should ensure the first ‘for’ loop works as expected.
> > Perhaps we need to replace ‘xfce4-screensaver-command’ by its absolute
> > file name there.
> > 
> 
> Currently xfce4-screensaver is not installed in the xfce package at all by default,
> so it isn't used. I could add it, but for me it was glitchy/flickering and I would keep 
> clearing the password as I was entering it so I couldn't log back in. It even does it
> in a VM. I do have a recent amd graphics card with proprietary linux though, my computer
> can't boot otherwise :(.
> 
> If you run guix environment --ad-hoc xfce4-screensaver
> then
>  xfce4-screensaver &; xfce4-screensaver-command --lock
> does it work for you?
> 
> I'm not sure what is best, should we be maximal and include xfce4-screensaver in the xfce
> package, or be minimal and make people have to install it manually?
> > WDYT?
> > 
> > Thanks,
> > Ludo’.

Are you using %desktop-services in your OS config? By default they come
with a screen-locker-service for both slock and xlockmore.

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