Severity: important


Boot method: UEFI boot from USB

Image version: debian-13.6.0-amd64-netinst.iso

Date: 2026-08-01


Machine: ASUS Adol 14 M5451UADOL / M5451UA

BIOS: M5451UA.310

Memory: 16 GB

GPU: AMD Radeon 780M

Architecture: amd64

Secure Boot: disabled

Fast Boot: disabled


Problem:


The Debian 13.6 installer cannot boot normally on this machine.


The default installer boot hangs during early kernel initialization.

Fedora 44 also fails to boot on the same machine.


I manually booted the Debian installer kernel and initrd from the GRUB

command line.


With these kernel parameters:


nomodeset acpi=noirq earlycon=efifb keep_bootcon ignore_loglevel


the kernel reproducibly panics during ACPI initialization.


The trace contains:


acpi_ex_prep_field_value

acpi_init

Kernel panic - not syncing: Attempted to kill init

exitcode=0x00000009


Using acpi=off instead allows the Debian installer to reach the language

selection screen, but the laptop's internal keyboard becomes completely

unresponsive, so installation cannot continue. acpi=off is therefore not

a usable workaround.


Reproduction steps:


1. Write debian-13.6.0-amd64-netinst.iso to a USB drive using Rufus

ISO image mode.

2. Boot the USB drive in UEFI mode.

3. Select Install.

4. The installer fails during early kernel initialization.

5. Boot the installer manually with acpi=noirq, earlycon=efifb,

keep_bootcon and ignore_loglevel.

6. A reproducible kernel panic occurs in acpi_ex_prep_field_value

during acpi_init.


Expected result:


The kernel should initialize ACPI and enter the Debian installer.


Actual result:


ACPI enabled: early boot hang or kernel panic.

ACPI disabled: installer starts, but the internal keyboard does not work.


BIOS 310 is currently the latest BIOS offered by ASUS for this model.

The same problem is reproducible with both Debian and Fedora.


Kernel panic photographs are attached.