On my x86_64-linux Guix system, I run GNOME 3 within Wayland. However, I need to keep 'slim-service' around for one purpose only: to occasionally remind GNOME sound settings of my preferred "alert" sound, since it forgets several times per month.
I personally find the default "Drip" sound to be intolerable. However, no matter how many times I tell GNOME to use "Sonar" instead, it seems to only remember that setting for a week or so, and then reverts back to "Drip", much to my annoyance :-/. To make matters worse, the GNOME sound settings doesn't work within Wayland. It launches, and I can view my settings, but if I change *any* sound setting, it immediately crashes. When this happens, I shut down my Wayland session, relaunch SLiM, log into GNOME within Xorg, reset the alert sound to "Sonar", and then switch back into Wayland. In the meantime, if anyone knows the magic incantation to change the GNOME alert sound to "Sonar" without using GNOME sound settings (and preferably from the command line) I would be grateful. Note that I'm running recent 'master', but pre-staging-merge. It's possible that the problem was fixed in 'staging'. I'll report back after I finish building my post-staging-merge system. Mark