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Frank 23372e96f5 fix(niri): pin the ultrawide to the 180 Hz mode its EDID actually offers

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

2026-10-21 00:05:17 -07:00

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title

description

CachyOS

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.

System Information

Property	Value
OS	CachyOS (rolling)
Kernel	`linux-cachyos` (performance series — 7.2.9-2 at 2026-10-19 probe)
LTS Kernel	`linux-cachyos-lts` (6.18.55-2 at 2026-10-19 probe)
Package Manager	pacman
Init	systemd
Display Manager	SDDM

Kernel Features

The CachyOS kernel includes:

EEVDF Scheduler — Earliest Eligible Virtual Deadline First, successor to CFS
LTO — Link-Time Optimization for better code generation
AutoFDO — Auto Feedback-Directed Optimization from profiling data
Propeller Scheduling — Reduced latency scheduling patches

Repositories

CachyOS uses v3 repositories alongside standard Arch repos:

Repository	Purpose
`[cachyos-v3]`	CachyOS-specific packages (kernels, tools)
`[cachyos-extra-v3]`	CachyOS extra packages
`[cachyos-core-v3]`	CachyOS core packages
`[cachyos]`	Legacy CachyOS repo
`[core]`	Arch core
`[extra]`	Arch extra
`[multilib]`	32-bit compatibility

CachyOS-Specific Packages

Package	Description
`cachyos-kernel-manager`	Simple kernel manager
`cachyos-hello`	Welcome screen
`cachyos-gaming-meta`	Gaming dependencies meta-package
`cachyos-gaming-applications`	Common gaming applications
`cachyos-ananicy-rules`	Process auto-categorization rules
`cachyos-fish-config`	Fish shell configuration
`cachyos-alacritty-config`	Alacritty terminal config
`cachyos-hooks`	libalpm hooks
`cachyos-micro-settings`	Micro settings utility

Gaming Stack

CachyOS ships with a comprehensive gaming stack:

Proton-CachyOS-SLR — Proton with Same-Level-Root patches
Wine-CachyOS-Opt — Optimized Wine build
UMU Launcher — Universal Minecraft/Unity launcher
ProtonTricks / Winetricks — Wine configuration utilities
Vulkan Tools — Vulkan validation and utilities
32-bit libraries — Full lib32 support for Steam

Default Userspace

CachyOS with Niri ships with a curated set of applications:

Niri — Scrollable-tiling Wayland compositor
Noctalia Shell — Desktop shell (launcher, wallpaper, session menu, lock screen)
Shelly Notifications — Notification daemon
Ghostty — Terminal emulator
Firefox — Web browser
Chromium — Alternative browser
Nautilus — File manager
Neovim — Text editor
Steam — Gaming platform
PipeWire + WirePlumber — Audio
grim/slurp/swappy — Screenshots
wf-recorder — Screen recording
hyprpicker — Color picker
wl-clipboard — Clipboard management
NetworkManager — Network management
BlueZ — Bluetooth
pavucontrol — Audio mixer
gvfs — Virtual filesystem
GNOME Keyring — Credential storage
xdg-desktop-portal-gnome — Portal services

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