Hello,
**Additional diagnostic data — ASRock Radeon RX 9060 XT (1002:7590)**

I would like to contribute additional diagnostic information concerning
the suspected AMD firmware regression.

**Hardware and software configuration**

- Distribution: Linux Mint 22.3 (Ubuntu 24.04 base)
- GPU: ASRock Radeon RX 9060 XT, 8 GB
- PCI ID: `1002:7590`, subsystem `1849:5410`, revision `C0`
- VBIOS: `113-APM8248-102`
- Kernel: `7.0.0-42-generic`
- Graphics driver: `amdgpu 3.64.0`
- Mesa: `25.2.8`
- Cinnamon: `6.6.9`
- AMD firmware package: `20240318.git3b128b60-0ubuntu3.3`

**Symptoms and investigation**

I previously experienced a black screen with a visible mouse cursor
following system updates. Switching to a TTY was possible.

After reinstalling Linux Mint, I updated the graphics stack
incrementally, rebooting between stages.

Cinnamon, Muffin, CJS, libdrm, Mesa, and Xorg were updated successfully.

I then installed AMD firmware package `0ubuntu3.3` and confirmed that
the system booted successfully with kernel `6.14.0-37-generic`.

I subsequently upgraded to kernel `7.0.0-42-generic` while keeping AMD
firmware package `0ubuntu3.3`.

This configuration also boots successfully, with `amdgpu` active and
without `nomodeset`.

**Working GPU initialization logs**

```text
amdgpu 0000:08:00.0: [drm] ATOM BIOS: 113-APM8248-102
amdgpu 0000:08:00.0: [drm] Loading DMUB firmware via PSP: version=0x0A000800
amdgpu 0000:08:00.0: smu fw version = 0x00664300 (102.67.0)
amdgpu 0000:08:00.0: SMU is initialized successfully!
amdgpu 0000:08:00.0: [drm] Display Core v3.2.369 initialized on DCN 4.0.1
amdgpu 0000:08:00.0: [drm] DMUB hardware initialized: version=0x0A000800
[drm] Initialized amdgpu 3.64.0 for 0000:08:00.0 on minor 1
```

**Known-working DMCUB firmware**

File:

`/lib/firmware/amdgpu/dcn_4_0_1_dmcub.bin.zst`

SHA-256:

`ecd8d2b8c2ccd5cc58cde4e18f5987b7a125797494cd02ccdb70ea654b560f61`

This is the checksum of the compressed firmware file installed with
package `0ubuntu3.3`.

**Limitations**

The original failing boot logs are no longer available following the
system reinstallation.

Firmware package `0ubuntu3.4` has not been retested in isolation with
this exact working configuration, so I cannot conclusively attribute the
original black screen to that package.

Nevertheless, the results establish a known-working baseline for this
GPU using kernel `7.0.0-42` and firmware package `0ubuntu3.3`.

I have placed `linux-firmware-amd-graphics` on hold at `0ubuntu3.3`
pending a confirmed fix.

I hope these details help with the investigation. I can provide
additional diagnostic information if needed.

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/2173041

Title:
  black screen after upgrading linux-firmware-amd-graphics to 0ubuntu3.4

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