Hello CachyOS Enthusiasts, @everyone  
 
This is our fourth release of the year, bringing the new CachyOS Hyprland Noctalia desktop option, DNS-over-QUIC support, Python and GCC performance improvements, and a variety of installer and hardware detection fixes!
 
First, the package stack has received a few important improvements. Python now uses extended PGO, improving performance for Python workloads. We have also added a GCC patch for generic x86 branch misprediction tuning, helping GCC better account for branch misprediction costs on modern Intel and AMD CPUs. Our pacman package now includes network isolation for scriptlets and hooks, preventing them from accessing the network by default. We also fixed a regression found in Phoronix Benchmarks when OpenBLAS was used on high core count CPUs. Additionally, proton-cachyos has been renamed to proton-cachyos-native.
 
The installer now includes the CachyOS Hyprland Noctalia desktop option together with a preview video, making it easier to see the desktop before selecting it. paru has been removed from the installation; users are recommended to use Shelly, either through its GUI or CLI, as an alternative. MangoWM now uses SDDM as its display manager, and GNOME System Monitor has been replaced with Resources. The audio package group now includes realtime-privileges, and the live session has better keyboard layout and variant detection.
 
CachyOS-Welcome now supports DNS over QUIC through blocky, including support for custom endpoints. A dedicated Troubleshooting page has been added, Ptyxis is now supported as a terminal, and new Azerbaijani and Greek localizations are available. The French readme and involvement pages have also been added. Several existing translations (Italian, German, French, Japanese, Bulgarian) were updated, and we fixed a crash when saved settings couldn't be read, plus corrected tweak state detection and global-service disabling via polkit.
 
In chwd, we added Turkish localization and removed cachyos-handheld from the handheld package lists. We also corrected virtual-machine vendor IDs, removed unnecessary fprintd service activation, and fixed the Mesa removal guard. chwd now resolves driver conflicts on multi-GPU systems where GPUs require incompatible driver branches, and ships a 32-bit Vulkan driver for virtual machines.
 
In cachyos-settings, user services now have a 15-second startup timeout and a 10-second shutdown timeout. This prevents long 90-second shutdown delays caused by user services waiting too long during shutdown.
 
On the fixes side, the installer now correctly handles keyboard layout ordering and locale1 configuration. It also copies the correct pacman configuration into the installed system, removes leftover /etc/calamares directories after installation, runs Calamares cleanup after all installation scripts, and drops the redundant Limine post-install step. In CachyOS-Welcome, selecting "Install Apps" no longer crashes when cachyos-pi is not installed; the button is now hidden when unavailable.
 
Features:
 
    Packages:
        Python now uses extended PGO to improve performance
        Added a GCC patch for generic x86 branch misprediction tuning, improving how GCC accounts for branch misprediction costs on modern Intel and AMD CPUs
        Fixed a regression found in Phoronix Benchmarks when OpenBLAS was used on high core count CPUs
        Renamed proton-cachyos to proton-cachyos-native
    pacman: Added network isolation for scriptlets and hooks
    Installer:
        Added CachyOS Hyprland Noctalia desktop option and preview video
        Removed paru from the installation; users are recommended to use Shelly, either through its GUI or CLI, as an alternative
        Added SDDM as the display manager for MangoWM
        Replaced GNOME System Monitor with Resources
        Added realtime-privileges to the audio package group
        Improved live-session keyboard layout and variant detection
    CachyOS-Welcome:
        Added DNS over QUIC (DoQ) support through blocky
        Added a dedicated Troubleshooting page
        Added Ptyxis terminal support
        Added Azerbaijani and Greek localizations
        Added French readme and involvement pages
        Updated Italian, German, French, Japanese, and Bulgarian translations
    chwd:
        Added Turkish localization
        Removed cachyos-handheld from handheld package lists
        Resolves driver conflicts on multi-GPU systems requiring incompatible driver branches (e.g. mixed NVIDIA generations), installing the best common driver or falling back to the primary GPU
        Added the 32-bit Vulkan driver for virtual machines
    cachyos-settings: Applied 15-second startup and 10-second shutdown timeouts to user services, preventing 90-second shutdown delays
 
 
Fixes:
 
    Installer:
        Fixed keyboard layout ordering and locale1 configuration handling
        Fixed copying the correct pacman configuration into the installed system
        Removed leftover /etc/calamares directories after installation
        Moved Calamares cleanup after all installation scripts
        Removed the redundant Limine post-install step
    CachyOS-Welcome:
        Prevented a crash when selecting "Install Apps" without cachyos-pi installed; the button is now hidden when unavailable
        Fixed a crash when the saved settings file could not be read or parsed; settings now reset to defaults on failure
        Corrected tweak detection (including graphical-session.target.wants) and global user-service tweak disabling via polkit
    chwd:
        Corrected virtual-machine vendor IDs
        Removed unnecessary fprintd service activation
        Fixed the Mesa removal guard
 
Manual changes for existing users: No manual changes needed. Just the usual updating:
 
sudo pacman -Syu
 
 
 
Download:
 
Desktop Edition:
 
Grab your copy of the latest ISO from our mirrors on SourceForge:
 
    CDN: https://iso.cachyos.org/desktop/260 [...] 260628.iso
    CDN2: https://cdn77.cachyos.org/ISO/deskt [...] 260628.iso
    Germany: https://mirror.cachyos.org/ISO/desk [...] 260628.iso
    USA: https://us.cachyos.org/ISO/desktop/ [...] 260628.iso
    China: https://mirrors.tuna.tsinghua.edu.c [...] 260628.iso
    Russia: https://archlinux.gay/cachy/ISO/des [...] 260628.iso
    Russia: https://mirror.yandex.ru/cachyos/IS [...] 260628.iso
    https://sourceforge.net/projects/cachyos-arch/files
 
 
Handheld Edition:
 
    CDN: https://iso.cachyos.org/handheld/26 [...] 260628.iso
    CDN2: https://cdn77.cachyos.org/ISO/handh [...] 260628.iso
 
 
Support Us:
 
Your contributions help us maintain our servers. Consider supporting CachyOS through:
 
    Patreon: https://www.patreon.com/CachyOS
 
 
Thank you for your continued support!
 
The CachyOS Team