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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).

Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.

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

submitted 6 months ago* (last edited 6 months ago) by thayer@lemmy.ca to c/linux@lemmy.ml

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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[–] fushuan@lemm.ee 1 points 6 months ago (1 children)

If you want to interact as little as possible with the display manager, try using lightdm, it will also autologin and it's lighter than gdm.

[–] thayer@lemmy.ca 1 points 6 months ago (1 children)

That was my first choice alternative, but I had no success with any of the available LightDM greeters under Fedora 40 Kinoite (autologin, slick or gtk). They all resulted in a "Failed to start seat: seat0" error, even after ensuring logind-check-graphical=true was set. I may give it another go when I have the time.

[–] fushuan@lemm.ee 1 points 6 months ago* (last edited 6 months ago)

Oh I just installed lightdm in arch, disabled whatever I had, enables that service and activated the autologin by writing my username in some files I don't remember anymore. And that was it.

Due to some hardware issues I had I even had no service enabled and used to start it manually from a non GUI environment every time I logged on, and it worked fine. Now it's properly enabled though.