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Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).

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KDE Plasma 6 and SDDM autologin workaround (lemmy.ca)

submitted 7 months ago* (last edited 7 months ago) by [email protected] to c/[email protected]

11 comments fedilink hide all child comments

Longtime Fedora Silverblue user here, who recently jumped over to Kinoite (Atomic KDE). I typically enable autologin on my display managers because I use whole disk encryption and already need to enter my passphrase to decrypt and start the OS.

I discovered pretty quickly that SDDM's autologin feature isn't working under Fedora 40. LightDM also failed to start under Wayland on F40, regardless of which greeter I tried.

Long story short, I opted to use GDM since I knew its automatic login feature worked fine under Wayland. It's worth noting that KDE has it's own lockscreen mechanism, so you won't even see GDM unless you manually logout of your session. To try this yourself:

Install GDM: rpm-ostree install --apply-live gdm
Disable SDDM: sudo systemctl disable sddm
Enable GDM: sudo systemctl enable gdm
Reboot and select the Plasma session before logging in; this is required only once in order to establish to the default, otherwise GDM will load a broken GNOME session when autologin is enabled
Edit /etc/gdm/custom.conf and add the following under [daemon] (replacing username with your own):
```
 AutomaticLoginEnable = true
 AutomaticLogin = username
```

Voila! You will no longer need to enter your user credentials before loading the desktop.

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[–] [email protected] 1 points 7 months ago* (last edited 7 months ago)

This bug is so old and tbh its a big f*** y** for KDE developement or whoever is responsible for this shitshow called SDDM. Its the reason my desktop pc is running LDM for multiple years now, since I stumbled over this.

But yeah, we need more KDE specific tools tralalala, instead of a working login manager.