this post was submitted on 08 Jan 2026
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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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It always chooses the default highest resolution, (which may not work on some devices with faulty EDID), does not respect the Wayland/X11 choice, has a long pause when going from login screen to desktop and does not support 24h clocks.
Just to name a few.
It supports 24h clocks all right and always has (I’ve used Plasma with SDDM for years and never have had issues with the clock!), but as you said in a different thread, it may have problems in separating the common locale from the time format.
Yea I have noticed this. It takes a long time to switch back as well when you lock the computer, logout, switch users, etc
The first one I think is a fundamental limitation in that display preferences by default is per-user. Maybe this makes it work for you? https://feddit.online/post/1350756/comment/6636228
The 24h clock might be similar - check your system-wide locale.
I don't really have this problem anymore since I got rid of my projector which advertised a resolution it couldn't handle. Had to login into the void since the login screen never showed up. Looks like this might be fixable nowadays.
The locale is set to American English but the time format is set to German, something the lock screen can handle but SDDM cannot. I also tried applying the Plasma settings to SDDM a few times but it doesn't really change anything.