# Omarchy 4.0.5 updates to Qt 6.12, Linux 7.2.8 kernel with BORE scheduler

> **Key takeaway:** Omarchy 4.0.5 moves to Qt 6.12, updates to Linux 7.2.8 with BORE scheduler, and patches security issues including unsafe PATH injection and root password hash handling.

**Published:** 2026-10-18T02:51:35+00:00 
**Source:** Omarchy Arch Distribution 
**Category:** distro-news 
**Canonical URL:** https://fosswire.org/news/omarchy-405-updates-to-qt-612-linux-728-kernel-with-bore-sch.html 

## Summary
Omarchy 4.0.5 is a maintenance release for the Arch-based distribution focused on fixes and under-the-hood updates rather than new features. The release upgrades the desktop shell to Qt 6.12, updates the default kernel to Linux 7.2.8 with the BORE scheduler, and refreshes packages to the October Arch snapshot. It also addresses three security issues and numerous hardware-specific bugs affecting Dell XPS 13, NVIDIA hybrid laptops, KEF USB speakers, and T2 Macs.

## What's in Omarchy 4.0.5
- **Kernel**: Linux 7.2.8 with BORE (Burst-Oriented Response Enhancer) scheduler replaces previous default
- **Qt migration**: Full move to Qt 6.12 required fixes for shell colors, panels, and third-party plugins breaking under the new version
- **Package priority**: Omarchy's own repository now takes precedence over upstream Arch repositories
- **Security fixes**: Removal of automatic PATH injection in project directories; root password hashes now erased during factory reset; hardening of helper scripts against malicious CLI flags
- **Hardware fixes**: Dell XPS 13 Panther Lake speaker support, NVIDIA hybrid laptop envvar optimization, T2 Mac Broadcom firmware fetcher restoration
- **Performance**: Reduced system update time via skipped redundant keyring refreshes, faster browser/web app launches, improved bar/shell restart speed

## Why it matters
The BORE scheduler adoption and Qt 6.12 migration keep Omarchy current with upstream developments, while the security fixes for PATH injection and password hash handling address concrete attack vectors. The hardware-specific fixes broaden compatibility for newer laptops and Apple Silicon-era Macs.