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This guide is to improve the KDE Plasma experience on X11. It particularly applies to those using the modesetting driver (mainly Intel graphics cards)
Install Xorg-git or Xlibre
This is a crucial step. XLibre and xorg-git contain the "TearFree" feature for modesetting, which is not available in the standard releases. If you use a driver other than modesetting, check that the TearFree option exists for your driver.
Installation depends on the distribution you use. On Arch Linux and derivatives:
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3d acceleration for Linux guests in KVM on Ubuntu Desktop
VirGL for Linux KVM guests on Ubuntu Desktop
NOTE: Please don't ask for help here, it was a miracle that I got it to work at all. Seek answers in the usual places (yes, even Stackoverflow knows more than I do).
The question: How can I get 3d accelerated graphics for Linux guests in KVM without using PCI passthrough?
The short answer is: Use VirGL. The long answer is more complicated, because the VirGL project has had slow but steady progress towards actually working reliably, but the degree to which any given Linux distribution (or related driver project) is in sync has varied greatly over time. Even if it works right now, today, on your machine, it might not tomorrow. Note that even when it works, graphics performance is mediocre to downright painful.
Tested on Ubuntu Desktop 22.04.04 LTS with qemu-kvm, in an "Ubuntu on Xorg" session (not Wayland).
Linux quests must have spice-vdagent installed (Ubuntu installs this by default). The hardware is a AMD 5600G d
V8 is Google’s open source high-performance JavaScript and WebAssembly engine, written in C++. It is used in Chrome and in Node.js, among others. It implements ECMAScript and WebAssembly, and runs on Windows 7 or later, macOS 10.12+, and Linux systems that use x64, IA-32, ARM, or MIPS processors. V8 can run standalone, or can be embedded into any C++ application.
Neither X11 nor Wayland are binaries that can be installed
Xorg, one universally shared default implementation
Multiple competing Wayland compositors
Unfortunately there is no universally used single Wayland compositor; apparently every desktop environment does its own, and as a result what works in one may not work in another
export DISPLAY=...
export WAYLAND_DISPLAY=...
How to know which WAYLAND_DISPLAY one needs to export? The sockets (and their names) should be located in /run/user/*. If WAYLAND_SOCKET is detected, the client will prefer to use the socket provided using that environment variable.
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Record desktop area on linux using slop and ffmpeg
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