Bug#1112288: amdgpu: GPU hang with 6.12 & 6.16sid, 6.16 liquorix works.

[kuu <kuu@qcm.org>]

Package: linux-image-amd64
Version: 6.16.3-1
Severity: important
Tags: upstream
X-Debbugs-Cc: kuu@qcm.org

Dear Maintainer,

*** Reporter, please consider answering these questions, where appropriate ***

   * What led up to the situation?
The user is having system freezes with their AMD Radeon RX 7600M XT GPU on a
Debian trixie system. The problem manifests as a full system freeze, typically
after a few hours or days of uptime. The freeze is preceded by specific errors
at boot time.

   * What exactly did you do (or not do) that was effective (or
     ineffective)?

Ineffective actions:

    Using the default Debian trixie kernel (6.12 series). This resulted in a
system freeze.

    Upgrading to the latest official unstable (sid) kernel (6.16.3+1) and the
latest firmware-amd-graphics package. This also resulted in a system freeze.

    Adding the kernel parameters amdgpu.powerplay=0 and amdgpu.noretry=0 did
not resolve the issue.

Effective action:

    Installing and using the Liquorix kernel (6.16.3-1-liquorix-amd64). This
kernel works perfectly and has not resulted in any system freezes.


   * What was the outcome of this action?

When using the official Debian kernels (6.12 or 6.16), the following errors
appear at boot:

    REG_WAIT timeout

    hub6-0:1.0: config failed, hub doesn't have any ports

These boot errors serve as a direct precursor to the system freeze that occurs
later.
When using the Liquorix kernel (6.16.3-1-liquorix-amd64), these boot errors do
not appear, and the system remains stable indefinitely.


   * What outcome did you expect instead?

The user expected the official Debian 6.16 kernel, paired with the latest
firmware, to work as reliably as the Liquorix kernel of the same version, and
for the boot errors and subsequent freezes to be gone. The expectation was that
the bug would be fixed in a newer kernel version, which was not the case with
the official build.

*** End of the template - remove these template lines ***


-- System Information:
Debian Release: 13.0
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable-security'), (500, 'stable'), (100, 'unstable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 6.16.3+deb14-amd64 (SMP w/32 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

Versions of packages linux-image-amd64 depends on:
ii  linux-image-6.16.3+deb14-amd64  6.16.3-1

linux-image-amd64 recommends no packages.

linux-image-amd64 suggests no packages.

-- no debconf information