5.0.1 is the current signed release. This page keeps the 4.0.0 launch films and release facts as they were published. Download 5.0.0 · 5.0.1 release notes.
4.0.0 was the first stable Umbra image. Firebreak on it left
address space unlimited and kept MemoryMax at 3072 MiB, so the code-mode
host no longer exited SIGTRAP. Fresh BIOS Fire and UEFI Ice Calamares
installs from this ISO completed Core first-boot.
Supported wording: For the first time in Shadowfetch Linux, choose Grok Bot at startup.
A broader world-first Grok-on-Linux claim is not established. Grok Bot needs an eligible account and internet.
Blender review exports with the approved gentle female narration. These are
4.0 review films, kept with the 4.0.0 launch record. The Shadowfetch Linux 4 walkthrough follows.
Release walkthrough · Shadowfetch Linux 4 (historical)
Shadowfetch Linux 4 — Mission Control and Grok Bot
A short introduction to Shadowfetch Linux 4 — Mission Control's inspectable, undoable agent
missions, the Fire and Ice editions of the 4.x line, and the option to choose Grok Bot at
first-boot setup. Kept with the 4.0.0 launch record; it does not show Shadowfetch Linux 5.
YouTube loads only if you press play.
Watch on YouTube
if the player does not load.
RELEASE IDENTITY
The image that replaced the C11 preview ISO.
Firebreak source
e1293bfad3bffaecd1ff869e378438f9f36398f7 on release/4.0.0
The earlier C11 ISO a5391737ab4aaf65e20bbfd0313bd3854114245c4df870ea64bcc362add53bda
does not contain the Firebreak VA/RSS split and is not the stable image.
Candidate8 screenshots and the C8 45-minute stress run are not final-image proof of every remaining case.
PROVED ON THIS ISO
Signed ISO rebuilt after removing the Firebreak RLIMIT_AS pin.
Fresh BIOS Fire install, installed-boot, Core first-boot.
Fresh UEFI Ice install from the live Ice GRUB menu; sf.element=ice is present and Ice stays offline.
Firebreak RLIMIT_AS unlimited; RSS / MemoryMax still 3072 MiB; session/execute did not SIGTRAP.
Featured Grok Bot startup choice, with account and internet requirements kept visible.
Local AI deferred; Buzz retirement preserves user model, profile and volume data.
NOT YET CLAIMED AT 4.0.0 LAUNCH
3.5-to-4.0 upgrade and Phoenix rollback were not repeated on this ISO.
The 45-minute concurrent stress run, full visual matrix, and evidence bundle were still pending at 4.0.0 launch; 4.1.0 completed and published them.
At 4.0.0 launch the public APT snapshot still listed 3.5.0-1 first-party packages; the suite now serves 4.1.0-1.
QXL guests can show gpu-verify-failed / no DRM render node. That is the known VM caveat.
Grok vendor UI can still show a connection / Retry screen. Sign-in does not prove authenticated cloud work.