*** This bug is a duplicate of bug 2173041 ***
    https://bugs.launchpad.net/bugs/2173041

Public bug reported:

After upgrading linux-firmware-amd-graphics from 20240318.git3b128b60-0ubuntu3.3
to 0ubuntu3.4, the system boots to the splash logo and then all displays turn 
off
(no signal). Switching to a TTY (Ctrl+Alt+F2) also stays black.

Tested combinations:
- Kernel 7.0.0-38 + firmware 0ubuntu3.4 -> black screen (broken)
- Kernel 7.0.0-42 + firmware 0ubuntu3.4 -> black screen (broken)
- Kernel 7.0.0-42 + firmware 0ubuntu3.3 -> works
- Kernel 7.0.0-38 + firmware 0ubuntu3.3 -> works

Also reproducible with only one monitor connected.

Hardware: AMD Radeon RX 9060 XT 16GB (Navi 44, DCN 4.0.1), Ryzen 5 5600X
OS: Linux Mint 22.3 (based on Ubuntu 24.04 noble), HWE kernel

Suspected cause: the dcn401 DMCUB firmware update introduced in 0ubuntu3.4
(LP: #2168847, "amdgpu: update dmcub fw for dcn32 and dcn401").

Workaround: holding linux-firmware-amd-graphics at 0ubuntu3.3.

--- System info ---
lspci -nnk | grep -A3 -E "VGA|Display"
0c:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. 
[AMD/ATI] Navi 44 [Radeon RX 9060 XT] [1002:7590] (rev c0)
 Subsystem: Gigabyte Technology Co., Ltd GV-R9060XTGAMING OC-16GD [Radeon RX 
9060 XT GAMING OC 16G] [1458:2429]
 Kernel driver in use: amdgpu
 Kernel modules: amdgpu

uname -r
7.0.0-42-generic

apt policy linux-firmware-amd-graphics
linux-firmware-amd-graphics:
  Installed: 20240318.git3b128b60-0ubuntu3.3
  Candidate: 20240318.git3b128b60-0ubuntu3.4
  Version table:
     20240318.git3b128b60-0ubuntu3.4 500
        500 http://archive.ubuntu.com/ubuntu noble-updates/main amd64 Packages
        500 http://archive.ubuntu.com/ubuntu noble-updates/main i386 Packages
 *** 20240318.git3b128b60-0ubuntu3.3 100
        100 /var/lib/dpkg/status

lsb_release -rd
No LSB modules are available.
Description:    Linux Mint 22.3
Release:        22.3

** Affects: linux-firmware (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: noble regression-update

** Description changed:

  After upgrading linux-firmware-amd-graphics from 
20240318.git3b128b60-0ubuntu3.3
  to 0ubuntu3.4, the system boots to the splash logo and then all displays turn 
off
  (no signal). Switching to a TTY (Ctrl+Alt+F2) also stays black.
  
  Tested combinations:
  - Kernel 7.0.0-38 + firmware 0ubuntu3.4 -> black screen (broken)
+ - Kernel 7.0.0-42 + firmware 0ubuntu3.4 -> black screen (broken)
  - Kernel 7.0.0-42 + firmware 0ubuntu3.3 -> works
  - Kernel 7.0.0-38 + firmware 0ubuntu3.3 -> works
  
  Also reproducible with only one monitor connected.
  
  Hardware: AMD Radeon RX 9060 XT 16GB (Navi 44, DCN 4.0.1), Ryzen 5 5600X
  OS: Linux Mint 22.3 (based on Ubuntu 24.04 noble), HWE kernel
  
  Suspected cause: the dcn401 DMCUB firmware update introduced in 0ubuntu3.4
  (LP: #2168847, "amdgpu: update dmcub fw for dcn32 and dcn401").
  
  Workaround: holding linux-firmware-amd-graphics at 0ubuntu3.3.
  
  --- System info ---
  lspci -nnk | grep -A3 -E "VGA|Display"
  0c:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. 
[AMD/ATI] Navi 44 [Radeon RX 9060 XT] [1002:7590] (rev c0)
-       Subsystem: Gigabyte Technology Co., Ltd GV-R9060XTGAMING OC-16GD 
[Radeon RX 9060 XT GAMING OC 16G] [1458:2429]
-       Kernel driver in use: amdgpu
-       Kernel modules: amdgpu
+  Subsystem: Gigabyte Technology Co., Ltd GV-R9060XTGAMING OC-16GD [Radeon RX 
9060 XT GAMING OC 16G] [1458:2429]
+  Kernel driver in use: amdgpu
+  Kernel modules: amdgpu
  
  uname -r
  7.0.0-42-generic
  
  apt policy linux-firmware-amd-graphics
  linux-firmware-amd-graphics:
-   Installed: 20240318.git3b128b60-0ubuntu3.3
-   Candidate: 20240318.git3b128b60-0ubuntu3.4
-   Version table:
-      20240318.git3b128b60-0ubuntu3.4 500
-         500 http://archive.ubuntu.com/ubuntu noble-updates/main amd64 Packages
-         500 http://archive.ubuntu.com/ubuntu noble-updates/main i386 Packages
-  *** 20240318.git3b128b60-0ubuntu3.3 100
-         100 /var/lib/dpkg/status
+   Installed: 20240318.git3b128b60-0ubuntu3.3
+   Candidate: 20240318.git3b128b60-0ubuntu3.4
+   Version table:
+      20240318.git3b128b60-0ubuntu3.4 500
+         500 http://archive.ubuntu.com/ubuntu noble-updates/main amd64 Packages
+         500 http://archive.ubuntu.com/ubuntu noble-updates/main i386 Packages
+  *** 20240318.git3b128b60-0ubuntu3.3 100
+         100 /var/lib/dpkg/status
  
  lsb_release -rd
  No LSB modules are available.
  Description:  Linux Mint 22.3
  Release:      22.3

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/2173227

Title:
  Regression: linux-firmware-amd-graphics 0ubuntu3.4 causes black screen
  on boot with Radeon RX 9060 XT (Navi 44 / DCN 4.0.1)

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