I'd be surprised if there was any alternative, to be honest.
I'd file the bug - your case is not common. I run kscreenlocker just fine and it's not such a ram hog here.
KDE is an international technology team creating user-friendly free and open source software for desktop and portable computing. KDE’s software runs on GNU/Linux, BSD and other operating systems, including Windows.
If you encounter a bug, proceed to https://bugs.kde.org, check whether it has been reported.
If it hasn't, report it yourself.
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Developers do not look for reports on social media, so they will not see it and all it does is clutter up the feed.
I'd be surprised if there was any alternative, to be honest.
I'd file the bug - your case is not common. I run kscreenlocker just fine and it's not such a ram hog here.
VRAM or regular RAM? It doesn't use that much regular RAM.
I use the Cinnamon screen saver with i3wm. It's just a Python script, it's reasonably light in resources, it looks smart enough and it comes with a nice command to remote-control it if you need to start the screen saver, lock or unlock it programmatically.
I'm not sure it works in Wayland though. I only use Xorg. I suppose it should since Cinnamon works in Wayland too now.
I'm specifically looking for something that works with kwin_wayland, this being the KDE instance and all.
The reason why I posted this is because there's nothing that prevents you from using any old screensaver / screenlocker out there in KDE. As I said, I use the Cinnamon screen saver in i3, which is not the Cinnamon environment.
That's the beauty of Linux: you can mix and match things to your heart's content.
I actually did already mention, in Wayland you need to coordinate screen locking with the compositor (kwin), otherwise I'd be using swaylock.
Ah okay, I didn't know that. I personally try to stay away from Wayland as long as possible so support for it gets better before I have to jump in. I'm not an early adopter for that sort of thing - even though Wayland is 16 years old at this point, but amazingly it's still too green for my taste.