Public bug reported:
Dear Ubuntu Developers / Kernel Team,
I am writing to report a critical issue I am encountering with Ubuntu
26.04 LTS on my ASUS Zenbook UX3404VA (Intel Core i9 13900H, Iris Xe
Graphics).
The Issue:
Upon installing Ubuntu 26.04 LTS, the system freezes consistently immediately
after the user authentication stage. The screen stops responding entirely,
although the keyboard remains responsive (no kernel panic). This behavior does
not occur in Ubuntu 25.10, where all hardware components function correctly.
System Details:
Laptop: ASUS Zenbook UX3404VA
Processor: Intel Core i9-13900H (Raptor Lake)
Graphics: Intel Iris Xe Graphics
OS Version: Ubuntu 26.04 LTS (Freeze observed) / Ubuntu 25.10 (Stable)
Environment: Default GNOME/Wayland
Troubleshooting Attempted:
Verified that Ubuntu 25.10 is completely stable on the same hardware.
The freeze specifically occurs at the transition from the login manager
to the desktop session, suggesting a potential regression in the xe vs
i915 driver handling or a Wayland/Mutter incompatibility in the 26.04
kernel.
The issue appears to be related to GPU hardware acceleration during
session initialization.
I would appreciate it if you could investigate this regression, as it
affects the stability of the latest LTS release on this specific laptop
model. Please let me know if you need any specific logs (e.g.,
journalctl -b -1) or debug information to help pinpoint the cause.
Thank you for your hard work and support.
Best regards,
Ali Beheshti
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/2159008
Title:
System freeze on ASUS Zenbook UX3404VA (i9 13900H) login screen in
26.04 LTS
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