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Archinstall 4.5 adds real-time kernels and AArch64 EFI boot ahead of October's ISO

The installer for October's Arch ISO refresh gains linux-rt options, GRUB and Limine EFI support on AArch64, moves its four Wayland compositor profiles from polkit to systemd-logind, and fixes a class of unverified fetches.

By BoneWednesday 30 September 20262 min readReleases

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Archinstall 4.5 is out, timed to land in October’s refreshed Arch installation ISO. The release notes are long on maintenance and short on drama, with four changes a future installer run will actually notice.

Kernels, architectures, profiles

The kernel menu grows real-time options: linux-rt and its LTS variant join the list, added from upstream in both flavours, which means a freshly installed system can start on a preemption-tuned kernel without a manual swap afterward. Real-time kernels used to mean a second repo or a rebuild for latency-sensitive audio and industrial work; now they sit in the installer’s kernel menu. AArch64 gets real EFI support in the installer: both GRUB and Limine can now be installed on ARM EFI systems, along with the ARM root partition type GUID. ARM moves a step closer to first-class in the installer. And the four Wayland compositor profiles, Hyprland, Labwc, Niri and Sway, move from polkit to systemd-logind, which is the direction the rest of the desktop stack has been going.

Fixes worth the line count

The quietly important one for anyone installing on an untrusted network: the installer now verifies TLS when it fetches, closing a class of network fetches that went unverified. Around it sit the smaller paper cuts: Wi-Fi SSIDs containing spaces reappear in the scan list, LANG is set to a fully qualified locale name, the EFI partition gets a tighter mount mask (fmask=0177), the credentials-encryption prompt now only appears when credentials will actually be saved, a systemd-python downgrade avoids a dependency install failure, Cockpit’s desktop profile swaps udisks2 for cockpit-storaged, the Intel open-source video stack gets its missing vpl-gpu-rt and libvpl pieces so ffmpeg and OBS work out of the box, and the disk menu’s import cycle is fixed. The wait on reflector.service is gone, which should shave time off the network step.

Smaller things

Translations arrive for Norwegian Bokmål, Serbian and Vietnamese, three of them from first-time contributors, and the release credits fourteen of those in total. Rounding it out: ghostscript joins the print-service packages, linux-firmware’s optional dependencies are now understood, which cuts a class of resolution warnings during install, the example configs are now covered by a test, the PKGBUILD has a single source, dependency updates in CI wait out a three-day cooldown, and the documentation got a pass for broken links and typos.

My read

If you reinstall Arch in October, this is the installer you will meet, and nothing in it should surprise you. The TLS fix is the one to want even if you never touch the kernel menu. Everything else is maintenance that removes steps, which is what installers are for.

Source: the 4.5 release notes.

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