Frank
23372e96f5
desk-1-home.kdl asked the Sceptre M34 for 3440x1440@239.999, a mode the panel has never offered. niri does not reject an unavailable mode: it logs "configured mode ... could not be found, falling back to preferred" and drives the EDID preferred mode - 60 Hz - on every connector event, which is why the monitor looked like it was dying rather than misconfigured. Read live with `niri msg outputs`, the mode list tops out at 180. Also destroys the copies of the phantom number: displays.md carried 239.999 in its diagram, its panel table and its copy-paste pattern block, and its rule 4 claimed an impossible mode leaves the output dark. Rule 4 now states the real failure mode, a new section separates config / DP-link / amdgpu-driver faults by log signature, and wlr-randr is corrected to not-installed (three pages claimed it; `pacman -Qs wlr` matches nothing). Applied live with `niri msg output <panel> mode <mode>` - the temporary per-output path, so no config reload and no logged-out session - verified at 3440x1440 @ 180.000 Hz with the compositor PID unchanged. Refs #58
113 lines
3.7 KiB
Markdown
113 lines
3.7 KiB
Markdown
---
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type: reference
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title: CachyOS
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description: Arch-based rolling release with performance-optimized kernels, repositories, and gaming stack. Running on the workstation.
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tags:
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- cachyos
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- arch
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- linux
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- kernel
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- performance
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timestamp: 2026-08-06
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verified: 2026-10-19
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---
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# CachyOS
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CachyOS is an Arch Linux-based rolling release distribution focused on performance. It ships with custom kernels featuring the EEVDF scheduler, LTO compilation, AutoFDO profiling, and Propeller scheduling patches.
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---
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## System Information
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| Property | Value |
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|----------|-------|
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| **OS** | CachyOS (rolling) |
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| **Kernel** | `linux-cachyos` (performance series — 7.2.9-2 at 2026-10-19 probe) |
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| **LTS Kernel** | `linux-cachyos-lts` (6.18.55-2 at 2026-10-19 probe) |
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| **Package Manager** | pacman |
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| **Init** | systemd |
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| **Display Manager** | SDDM |
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## Kernel Features
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The CachyOS kernel includes:
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- **EEVDF Scheduler** — Earliest Eligible Virtual Deadline First, successor to CFS
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- **LTO** — Link-Time Optimization for better code generation
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- **AutoFDO** — Auto Feedback-Directed Optimization from profiling data
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- **Propeller Scheduling** — Reduced latency scheduling patches
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## Repositories
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CachyOS uses v3 repositories alongside standard Arch repos:
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| Repository | Purpose |
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|------------|---------|
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| `[cachyos-v3]` | CachyOS-specific packages (kernels, tools) |
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| `[cachyos-extra-v3]` | CachyOS extra packages |
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| `[cachyos-core-v3]` | CachyOS core packages |
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| `[cachyos]` | Legacy CachyOS repo |
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| `[core]` | Arch core |
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| `[extra]` | Arch extra |
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| `[multilib]` | 32-bit compatibility |
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## CachyOS-Specific Packages
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| Package | Description |
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|---------|-------------|
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| `cachyos-kernel-manager` | Simple kernel manager |
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| `cachyos-hello` | Welcome screen |
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| `cachyos-gaming-meta` | Gaming dependencies meta-package |
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| `cachyos-gaming-applications` | Common gaming applications |
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| `cachyos-ananicy-rules` | Process auto-categorization rules |
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| `cachyos-fish-config` | Fish shell configuration |
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| `cachyos-alacritty-config` | Alacritty terminal config |
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| `cachyos-hooks` | libalpm hooks |
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| `cachyos-micro-settings` | Micro settings utility |
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## Gaming Stack
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CachyOS ships with a comprehensive gaming stack:
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- **Proton-CachyOS-SLR** — Proton with Same-Level-Root patches
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- **Wine-CachyOS-Opt** — Optimized Wine build
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- **UMU Launcher** — Universal Minecraft/Unity launcher
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- **ProtonTricks / Winetricks** — Wine configuration utilities
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- **Vulkan Tools** — Vulkan validation and utilities
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- **32-bit libraries** — Full lib32 support for Steam
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## Default Userspace
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CachyOS with Niri ships with a curated set of applications:
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- **Niri** — Scrollable-tiling Wayland compositor
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- **Noctalia Shell** — Desktop shell (launcher, wallpaper, session menu, lock screen)
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- **Shelly Notifications** — Notification daemon
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- **Ghostty** — Terminal emulator
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- **Firefox** — Web browser
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- **Chromium** — Alternative browser
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- **Nautilus** — File manager
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- **Neovim** — Text editor
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- **Steam** — Gaming platform
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- **PipeWire + WirePlumber** — Audio
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- **grim/slurp/swappy** — Screenshots
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- **wf-recorder** — Screen recording
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- **hyprpicker** — Color picker
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- **wl-clipboard** — Clipboard management
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- **NetworkManager** — Network management
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- **BlueZ** — Bluetooth
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- **pavucontrol** — Audio mixer
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- **gvfs** — Virtual filesystem
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- **GNOME Keyring** — Credential storage
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- **xdg-desktop-portal-gnome** — Portal services
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---
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## See Also
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- ](../system/index.md) — system overview
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- [niri](niri/index.md) — Compositor documentation
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- [[noctalia-shell|noctalia-shell]] — Desktop shell documentation
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- [[applications|applications]] — Application reference
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