this post was submitted on 24 Mar 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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I am not sure that is fully true. Or at least not fully explained. The Steamdeck has a full KDE environment installed and it uses this when in desktop mode. But steam is not running in big picture mode in front of this.
KDE is not running at all when in the game mode of the Steamdeck. In that mode it uses a compositor written by valve called gamescope. Switching between these is effectively logging out and back in again to switch the compositor.
Also it now has a way to run the desktop as a nested session in game mode but that is winning kwin inside gamescope.
I haven't tested this myself but I assume one could benchmark both and see if there is noticeable performance loss.