*** This bug is a security vulnerability ***
Public security bug reported:
Hardware
========
Laptop: MSI Creator A16 AI+ A3HVGG (MS-15FK)
CPU: AMD Ryzen AI 9 365
Integrated GPU: AMD Radeon 890M
Discrete GPU: NVIDIA RTX 4070 Laptop
BIOS: E15FKAMS.316 (2025-09-11)
Operating System
================
Linux Mint 22.3 Cinnamon
Based on Ubuntu 24.04 LTS
NVIDIA Open Driver 595.84
Problem
=======
The system boots normally with Ubuntu HWE kernel 6.17.0-41.
After upgrading to Ubuntu HWE kernels 7.0.0-27 and 7.0.0-28 the system
consistently fails during graphical startup.
The boot sequence is:
- GRUB menu appears normally.
- Ubuntu/Linux Mint splash screen appears.
- The display then turns completely black.
- No graphical login screen appears.
- No visible TTY is available.
- The machine does not recover.
Booting the previous kernel immediately restores normal operation.
Regression
==========
Working kernel:
6.17.0-41-generic
Broken kernels:
7.0.0-27-generic
7.0.0-28-generic
Expected Result
===============
The graphical login screen should appear normally.
Actual Result
=============
The display remains permanently black after the splash screen.
Additional Information
======================
Kernel logs show that both the AMD and NVIDIA drivers initialize successfully
and LightDM starts, but no graphical session becomes visible.
I have attached:
- failed kernel journal
- full failed boot journal
- working kernel journal
- hardware information
- PCI information
- BIOS information
- kernel command line
At this point I cannot determine whether this is an Ubuntu HWE
regression or an upstream Linux kernel regression.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: 7.0.0 kernel
** Information type changed from Public to Public Security
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https://bugs.launchpad.net/bugs/2162369
Title:
[REGRESSION] Black screen after splash with Ubuntu HWE kernel
7.0.0-27/28 on MSI Creator A16 AI+ (AMD Radeon 890M + NVIDIA RTX 4070
Laptop)
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