Bug#1143269: linux: Fatal error during GPU init

From	Daniel G <danielofawesomeness@gmail.com>
Newsgroups	linux.debian.bugs.dist, linux.debian.kernel
Subject	Bug#1143269: linux: Fatal error during GPU init
Date	2026-08-01 21:40 +0200
Message-ID	<NnnIR-8kHP-1@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

Cross-posted to 2 groups.

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Source: linux
Version: 6.12.100+deb13-amd64
Severity: important
X-Debbugs-Cc: danielofawesomeness@gmail.com

Dear Maintainer,

System is a Lenovo Yoga 7 2-in-1 with an AMD Ryzen AI (Krackan Point,
"Krackan2", PCI ID 1002:1902) integrated GPU. Fresh Debian 13 (Trixie)
install. amdgpu driver loads but fails during GPU initialization at boot.

Confirmed GPU is detected via lspci (Display controller: AMD/ATI Krackan2,
rev c0). Confirmed amdgpu kernel module and firmware-amd-graphics
(20250410-2, latest available in trixie/non-free-firmware) are installed
and current. Manually updated amdgpu firmware from upstream
linux-firmware git and rebuilt initramfs — no change. Added
acpi_backlight=native kernel boot parameter — no change.

dmesg shows:
[ 3.474251] amdgpu 0000:04:00.0: amdgpu: Fatal error during GPU init
[ 3.474310] amdgpu 0000:04:00.0: probe with driver amdgpu failed with error -22
No specific IP block failure is logged before this — it fails immediately
after IP DISCOVERY (0x1002:0x1902 0x17AA:0x3829 0xC0) and MMIO register
setup. Result: /sys/class/backlight is empty, /sys/class/drm has no card0
entry, /dev/dri/render* does not exist, xrandr reports gamma size 0.
System has no working display driver at all — falls back to basic
framebuffer console only.

Expected a working amdgpu-driven display with functional backlight/brightness
control, consistent with this hardware working correctly on Ubuntu with
the same physical machine.


-- System Information:
Debian Release: 13.6
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable-security'), (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 6.12.100+deb13-amd64 (SMP w/12 CPU threads; PREEMPT)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

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Bug#1143269: linux: Fatal error during GPU init Daniel G <danielofawesomeness@gmail.com> - 2026-08-01 21:40 +0200

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