This bug was fixed in the package linux-firmware -
20240318.git3b128b60-0ubuntu2.19

---------------
linux-firmware (20240318.git3b128b60-0ubuntu2.19) noble; urgency=medium

  * [SRU] Add support of cs42l43 and cs35l56 on ThinkPad P1 and P16 (LP: 
#2122379)
    - cirrus: cs35l56: Add firmware for Cirrus Amps for some Lenovo laptops

linux-firmware (20240318.git3b128b60-0ubuntu2.18) noble; urgency=medium

  * AMD Krackan point system hang at black screen while booting up (LP: 
#2121207)
    - amdgpu: update GC 11.5.2 firmware
    - amdgpu: update gc 11.5.2 firmware
    - amdgpu: update gc 11.5.2 firmware
    - amdgpu: update gc 11.5.2 firmware
    - amdgpu: update gc 11.5.2 firmware
    - amdgpu: update gc 11.5.2 firmware
  * Enable  Wi-Fi 7 MLO on MTK MT7925 (2.4/5 GHz) (LP: #2121342)
    - mediatek MT7925: update bluetooth firmware to 20250425073330
    - mediatek MT7925: update bluetooth firmware to 20250526153203
    - mediatek MT7925: update bluetooth firmware to 20250721233113
    - linux-firmware: update firmware for MT7925 WiFi device
  * [SRU] Add GuC/HuC firmware support for Panther lake (LP: #2116108)
    - xe: First GuC release for Pantherlake
    - xe: First HuC release for Pantherlake
  * Fix low volume issue on left speaker on Dell Oasis series (LP: #2119494)
    - linux-firmware: Add tuning parameter configs for CS35L41 Firmware
    - cirrus: cs35l41: Add Firmware for various HP Laptops using CS35L41 HDA
    - cirrus: cs35l41: Update Firmware for Dell Oasis
  * Fix incorrect volume issue on left/right channels on Dell Renegade platform 
(LP: #2121645)
    - SAUCE: Revert "UBUNTU: SAUCE: cirrus: cs35l56: Add firmware for Cirrus 
CS35L56 for various Dell laptops"
    - cirrus: cs35l56: Add firmware for Cirrus CS35L56 for various Dell laptops
    - cirrus: cs35l56: Update firmware for Cirrus Amps for some Dell laptops
    - cirrus: cs35l56: Update firmware for Cirrus Amps for some Dell laptops
    - cirrus: cs35l56: Add firmware for Cirrus CS35L56 for various Dell laptops
  * [SRU] multiple functions in GUI unusable, stall with AMD Krackan 2 (LP: 
#2123814)
    - amdgpu: update dmcub fw for various DCN version
    - amdgpu: update dmcub fw for dcn314
    - amdgpu: DMCUB updates for various ASICs
    - amdgpu: DMCUB updates for various ASICs
    - amdgpu: DMCUB updates for various ASICs
    - amdgpu: DMCUB updates for various ASICs

 -- Juerg Haefliger <[email protected]>  Thu, 18 Sep 2025
15:29:43 +0200

** Changed in: linux-firmware (Ubuntu Noble)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/2121207

Title:
  AMD Krackan point system hang at black screen while booting up

Status in HWE Next:
  New
Status in linux-firmware package in Ubuntu:
  Fix Released
Status in linux-firmware source package in Noble:
  Fix Released
Status in linux-firmware source package in Plucky:
  Fix Released
Status in linux-firmware source package in Questing:
  Fix Released

Bug description:
  [Impact]
  On AMD Krackan platform, it sometimes can't boot up successfully with blank 
screen.

  From the log captured by pstore, the amdgpu failed to probe and timed out 
after around 68 seconds.
  <3>[   41.375166] amdgpu 0000:65:00.0: amdgpu: failed to write reg 1a874 wait 
reg 1a886
  <3>[   53.351332] amdgpu 0000:65:00.0: amdgpu: failed to write reg 2920 wait 
reg 2932
  <3>[   65.351028] amdgpu 0000:65:00.0: amdgpu: failed to write reg 1a874 wait 
reg 1a886
  <3>[   77.355752] amdgpu 0000:65:00.0: amdgpu: failed to write reg 2920 wait 
reg 2932
  <3>[   89.361497] amdgpu 0000:65:00.0: amdgpu: failed to write reg 1a874 wait 
reg 1a886
  <3>[  101.367445] amdgpu 0000:65:00.0: amdgpu: failed to write reg 2920 wait 
reg 2932
  <3>[  113.373440] amdgpu 0000:65:00.0: amdgpu: failed to write reg 1a874 wait 
reg 1a886
  <3>[  125.379438] amdgpu 0000:65:00.0: amdgpu: failed to write reg 2920 wait 
reg 2932
  <3>[  137.385433] amdgpu 0000:65:00.0: amdgpu: failed to write reg 1a874 wait 
reg 1a886
  <3>[  149.391434] amdgpu 0000:65:00.0: amdgpu: failed to write reg 2920 wait 
reg 2932
  <3>[  161.397438] amdgpu 0000:65:00.0: amdgpu: failed to write reg 1a874 wait 
reg 1a886
  <3>[  173.403436] amdgpu 0000:65:00.0: amdgpu: failed to write reg 2920 wait 
reg 2932
  <3>[  185.409421] amdgpu 0000:65:00.0: amdgpu: failed to write reg 1a874 wait 
reg 1a886
  <3>[  197.415437] amdgpu 0000:65:00.0: amdgpu: failed to write reg 2920 wait 
reg 2932
  <3>[  209.421437] amdgpu 0000:65:00.0: amdgpu: failed to write reg 1a874 wait 
reg 1a886
  <7>[  689.674671] probe of 0000:65:00.0 returned 110 after 683466368 usecs

  [Fix]
  update the gc 11.5.2 firmware fixes the issue

  674f8b1d amdgpu: update GC 11.5.2 firmware
  0fde9638 amdgpu: update gc 11.5.2 firmware
  1e6f0edc amdgpu: update gc 11.5.2 firmware
  5eac1029 amdgpu: update gc 11.5.2 firmware
  929c0891 amdgpu: update gc 11.5.2 firmware
  cc7d01ee amdgpu: update gc 11.5.2 firmware
  f532df3c amdgpu: update GC 11.5.2 firmware

  [Test]
  Run cold boot test on AMD Krackan point platform for around 30 times, it 
should always boot into desktop without any issues.

  [Where problems could occur]
  gc 11.5.2 firmware is for Krackan point, so it might affect all Krackan point 
systems.

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