The CachyOS June 2026 release brings performance tuning for Python workloads, new Hyprland Noctalia desktop options, and critical network isolation improvements that matter for users running untrusted packages. This fourth release of the year focuses on hardware detection refinements and installer stability after community feedback highlighted friction points in recent months.
Highlights
| 1 | Python now compiles with extended Profile Guided Optimization (PGO), providing measurable speedup for workloads that lean on the Python interpreter. This affects package builds and runtime performance across the board, something Linux practitioners should understand when benchmarking system performance on Linux. |
| 2 | Pacman now enforces network isolation on installation scripts and hooks by default, preventing malicious or careless package maintainers from exfiltrating data during system updates. This is a tangible security hardening that doesn't require user intervention. |
| 3 | New Hyprland Noctalia desktop option ships with an in-installer preview video, helping users decide which window manager fits their workflow before committing to the install. Alternatives include KDE Plasma and MangoWM, with CachyOS adding SDDM as the display manager for the MangoWM profile. |
| 4 | DNS-over-QUIC (DoQ) support now available through blocky in CachyOS-Welcome, with custom endpoint configuration for users running their own DNS infrastructure or preferring privacy-focused resolvers over defaults. |
| 5 | Multi-GPU driver conflict resolution now works correctly on systems with mixed GPU generations, automatically selecting the best common driver or falling back to primary GPU. This fixes crashes on hybrid AMD or NVIDIA setups that were previously problematic. |
| 6 | GCC now includes branch misprediction tuning for modern Intel and AMD processors, improving code generation on architectures where branch prediction behavior differs from older x86 assumptions. This is a compiler-level optimization patch that benefits all compiled packages. |
This release addresses pain points that emerged from active users testing the May snapshot. The removal of paru as default AUR helper and replacement with Shelly marks a shift toward actively maintained tooling. Existing users get these improvements through a standard update cycle and need no manual intervention. The handheld edition also receives the same feature set, crucial for Steam Deck users and handheld gaming device owners running this distribution.
| Release Date | June 28, 2026 |
| Distribution | Arch Linux based with performance customizations |
| Key Component | Python 3.13, GCC 14.1, Linux 6.18 LTS live environment with Linux 7.1 for installed systems |
| Package Manager Change | Paru removed, Shelly recommended for AUR |
CachyOS June 2026 Performance Optimizations that Actually Matter
The Extended PGO build for Python isn't marketing fluff. Profile Guided Optimization compiles Python by running the test suite first, recording which code paths execute most frequently, then recompiling to optimize those hot paths. For users running data processing scripts, Django applications, or any Python workload in production, this translates to real measurable improvement. The difference isn't massive on single operations, but cumulative over hours of running scripts, it compounds.
The GCC branch misprediction patch is equally practical. Modern CPUs have sophisticated branch predictors, but predicting branches incorrectly stalls the pipeline. This patch helps GCC understand that certain branch patterns on Intel 12th gen and newer, and Ryzen 7000 series, behave differently than on older architectures. Code that was compiled with generic x86 assumptions now gets tuned to actual CPU behavior. This matters for intensive workloads and system-level tooling.
The OpenBLAS library received a critical performance regression fix discovered through Phoronix Benchmarks. On high-core-count CPUs, OpenBLAS workloads were underperforming significantly. This release resolves that issue, restoring full performance for mathematical and scientific computing workloads using this widely adopted linear algebra library.
Gaming and Proton Updates
The proton-cachyos package has been renamed to proton-cachyos-native to better reflect its purpose as a native Proton build for this distribution. Existing users won't experience disruption, but new installations get this renamed package which integrates more directly with the distribution's gaming toolchain. This is particularly important for users relying on Linux distributions optimized for gaming.
Security Hardening in Package Management
Pacman's network isolation for scriptlets and hooks is the kind of feature users don't notice until something goes wrong. Package installation scripts run with privileges and can theoretically access the network. A compromised script could exfiltrate user data during an update. This release makes that harder by default.
The change means install-time package hooks can't reach out to remote resources unless explicitly configured. For most users this changes nothing. For users concerned about supply chain attacks in the AUR or those running minimal network policies, this is a meaningful defense. This pairs well with understanding Linux security fundamentals and package source verification practices.
Audio and System Responsiveness Improvements
The audio package group now includes realtime-privileges by default, enabling low-latency audio processing out of the box. Users no longer need to manually add audio group memberships to achieve low-latency recording and playback. This matters for music producers, audio engineers, and anyone running DAWs or audio processing software on this distribution.
User services in cachyos-settings now have 15-second startup and 10-second shutdown timeouts, completely eliminating the notorious 90-second system shutdown hang. Previously, if a user service failed to respond during shutdown, the system would wait the full timeout before forcing termination. This release dramatically improves shutdown responsiveness while maintaining stability.
Desktop and Installer Refinements
The Hyprland Noctalia option isn't just another tiling window manager. Hyprland focuses on smooth animations, multi-monitor support, and keyboard-first workflows. The inclusion of a preview video during installation is smart design. Users can watch a 2 minute video and decide if tiling window manager workflow fits them before locking into it post-install.
GNOME System Monitor replaced with Resources reflects a broader ecosystem shift. Resources is lighter weight and uses fewer system resources, which matters on older hardware or when running system monitoring continuously. CachyOS added SDDM as the display manager for the MangoWM profile, improving consistency across desktop options.
CachyOS-Welcome now includes a dedicated Troubleshooting page for users encountering installation or configuration issues, and adds official support for the Ptyxis terminal emulator alongside other terminal options. Better keyboard layout detection in the live session means first-time users and international users get their keyboard configured correctly from the start. This wasn't working reliably in prior releases, particularly for variant layouts like Dvorak or non-English QWERTY variants.
Hardware Detection and Multi-GPU Support
The multi-GPU driver conflict resolution deserves attention from anyone running hybrid graphics. Systems with mixed GPU generations, or machines with both Intel integrated and discrete NVIDIA cards, historically crashed during driver installation. This release's hardware detection (chwd) now resolves which drivers are compatible across the entire GPU set and installs the best common option.
For users with Lenovo gaming laptops featuring both Intel Arc and NVIDIA RTX, or desktops with multiple NVIDIA generations, this removes a major pain point. The addition of 32-bit Vulkan drivers for virtual machines also matters if you're running gaming workloads in KVM or VirtualBox. This is practical Linux engineering addressing real use cases.
In hardware configuration management (chwd), the cachyos-handheld package has been removed from handheld package lists, streamlining configurations and reducing installation bloat on handheld devices. This cleanup makes the handheld edition even leaner while maintaining full feature parity with desktop editions.
DNS Privacy and Network Configuration
DNS-over-QUIC support through blocky is a networking feature that appeals to users running their own DNS infrastructure or those concerned about ISP DNS snooping. QUIC encrypts DNS queries at the protocol level, preventing intermediate networks from observing which domains you resolve.
The CachyOS-Welcome application now lets users configure custom DNS endpoints during or after installation, rather than being locked into defaults. This matters if you run Pi-hole, AdGuard Home, or any custom DNS server on your network. Custom endpoint configuration means your privacy setup travels with your system.
The Paru to Shelly Transition
Removing paru from default installation and recommending Shelly is controversial in the community, and the forum discussion shows that clearly. Paru is maintained but development is slower. Shelly is actively developed as part of the CachyOS project and integrates more tightly with their update tooling.
For users already running paru, nothing breaks. You can still install it manually. For fresh installs, Shelly provides AUR support through both CLI and GUI, though the CLI interface currently doesn't match pacman's conventions exactly. This is a tooling maturity bet by the CachyOS team. Whether it pays off depends on Shelly's development trajectory over the next 2-3 releases.
The removal also signals that CachyOS is pushing toward standardized package management workflows rather than supporting multiple competing AUR helpers indefinitely.
What Hasn't Changed for Users
Existing systems get these improvements through the standard update cycle. There's no manual intervention needed. Running sudo pacman -Syu pulls in all the new packages and configurations. The update is backward compatible, meaning your current system state survives the update without extra steps.
The handheld edition ships with identical improvements, important for Steam Deck users who want the latest performance tuning and hardware detection fixes without reinstalling. Both desktop and handheld ISOs are available from multiple CDN and regional mirrors, with download links on the official website.
Why This Matters for Linux Users
This release represents iterative hardening and performance tuning rather than flashy new features. That's exactly what actively maintained Linux distributions do. The Python PGO optimization affects every Python package in the repos. The GCC branch prediction tuning affects all compiled code. The network isolation in pacman affects security at the package layer.
For sysadmins evaluating Linux distributions for developer workstations or gaming machines, these kinds of foundational improvements matter more than counting new apps or flashy UI redesigns. They compound over time. A system that starts 5% faster and runs Python workloads 3-4% faster accumulates tangible productivity gains over months of use.
The hardware detection refinements also signal that CachyOS developers are actively using the distribution themselves on diverse hardware. The multi-GPU fix, keyboard layout detection, and device-specific workarounds come from real testing, not theoretical configurations.
Getting Started
Download the June 28 ISO from official mirrors. The desktop edition includes all the features mentioned. The handheld edition is identical in terms of packages and optimizations but uses pre-configured settings for devices like the Steam Deck. Boot from USB, walk through the installer, and you'll hit the new Hyprland preview video if you select that option. The entire install process is straightforward and improved from prior releases.
For users on older hardware or slower storage, the performance improvements from Python PGO and GCC tuning might feel subtle. For users on modern multi-core systems running heavy workloads, the difference should be noticeable. The security improvements in pacman apply universally regardless of hardware.
Sources & References
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