Omarchy 4.0.4 makes a substantive platform change by shipping and booting its own custom kernel, linux-omarchy, as the default on supported systems (T2 Macs continue to prioritize the specialized linux-t2 kernel). The kernel is a distinct source tree maintained by the project rather than a renamed Arch build, and the release includes matching linux-omarchy-headers on the installation media. The current line is based on the Linux 7.2 series, and the distro provides an upgrade path so existing users can switch via Update > Omarchy or install the new ISO released on September 15.
The custom kernel focuses on desktop responsiveness under heavy load and memory pressure, improved gaming compatibility (including smoother output on supported AMD HDMI displays), faster common Btrfs operations, and enhanced power management. Hardware compatibility fixes listed for 4.0.4 include remedies for missing audio, unresponsive touchpads, display freezes, slow startup/resume, and a specific webcam issue affecting Dell XPS systems on Linux 7.2.x. Btrfs optimizations matter because Omarchy uses Btrfs by default with integrated Snapper snapshots and the Limine bootloader, so the kernel-level changes target both performance and real-world hardware reliability.
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