this post was submitted on 16 Nov 2023
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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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Gamescope is a microcompositor from Valve that is used on the Steam Deck. Its goal is to provide an isolated compositor that is tailored towards gaming and supports many gaming-centric features such as:
-Spoofing resolutions -turning off VSync on Wayland desktops -using HDR -Upscaling using AMD FidelityFX™ Super Resolution or NVIDIA Image Scaling -Limiting framerates
In particular, gamescope is rendered seperately to your entire desktop, meaning that certain problem games that may have issues when rendered by your normal compositor (wayland or X11) may work fine under gamescope. For instance: certain games may have jerky mouse input or frequent crashes when running under wayland, but those issue may disappear when running within gamescope.
(this is also why we call gamescope a micro-compositor, as it runs seperately to your main compositor that handles your desktop e.g. Wayland or X11)
https://wiki.archlinux.org/title/Gamescope