> Verified with linux-firmware 20240318.git3b128b60-0ubuntu2.19, we still 
> encounter the hang issue.
> We still need this firmware update and the hang issue should be from the 
> driver, so set to verify done.

Sorry, what do you mean with "driver"? The kernel? Should a kernel task
be added to this bug? Is there anything left to fix in linux-firmware?

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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 Committed
Status in linux-firmware source package in Plucky:
  Fix Committed
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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