For context, I’m using XMonad under xfce4, with compton.
light-locker doesn’t work anymore. The only workaround is to switch to a different VT, log in, and manually unlock the session with
loginctl. So I decided to try different lockers, but kept finding fatal flaws.
physlock: The display never shuts off. Otherwise this would definitely be my choice. I’m having trouble finding a way to fix this.
i3lock: Breaks with compton. If a new window like a notification shows up, all your windows are brought to the foreground, in front of the lock. Works fine without compton though.
xsecurelock: Breaks with compton in the same way, plus the background wigs out with some white flashing. Otherwise works fine.
slock: unable to disable OOM killer. Make sure to suid or sgid slock., but with
sudo, I get
slock: crypt: Invalid argument
xlockmore: Same issue with compton as
The obvious conclusion is that I should… just not use compton. But when I don’t have compton enabled, I get horrible screen tearing in my windows, and I’m not really sure why.
Anybody have any guidance on this matter?
Sorry, don’t know anything about this issue but you could try xscreensaver? It also performs locking and I haven’t had any issues with it, although I don’t use compton…
For slock, do you have
programs.slock.enable = true in your nixos configuration?
The error looks like slock is attempting to disable OOM killer, but failing due to permissions. Using the nixos setting will install slock with a setuid wrapper that should allow for this.
Ultimately my “solution” was to surround my actual locking command in my locker wrapper script with
systemctl --user stop compton.service and
systemctl --user start compton.service. Ultimately it looks like lockers kind of have to be implemented as compositors, and having more than one concurrent compositor is a nonsense idea. So this seems the most robust, if a little dissatisfying. I really would have liked to just use
Testing currently if this patch https://github.com/systemd/systemd/pull/13811 will fix the issues with light-locker. If it does, I’ll be sure it gets applied to systemd on master and 19.09.
(once merged of course)
Sweet! Though I bet it’ll still have issues with compton, unfortunately.
Cross referencing https://github.com/NixOS/nixpkgs/issues/69399#issuecomment-544513497 if anyone wants a nixos config to use the patch. I did confirm it fixed the issue.