I have a related reproduction on another AMD Picasso/Raven2 system.

Hardware:

* HP 15s-eq0003nv
* Product: 8RU92EA
* Board ID: 86FD
* AMD Ryzen 5 3500U
* Radeon Vega / Picasso / Raven2
* Kubuntu
* Kernels 7.0.0-30 and 7.0.0-31
* BIOS F.79, released 2026-04-16

My failed normal boot also reports:

"amdgpu 0000:04:00.0: psp gfx command LOAD_TA(0x1) failed and response
status is (0x7)"

It also reports:

"RDRAND is not reliable on this platform; disabling."

However, in my case AMDGPU continues initializing successfully
afterward. The eventual failure is during the DRM/compositor handoff.

The failed boot showed:

simpledrm initialized on DRM minor 0

then:

amdgpu initialized on DRM minor 1

KWin subsequently reported:

"Atomic modeset test failed! No such device"

"Failed to open drm device /dev/dri/renderD128"

"Primary gpu has been removed! Quitting..."

I found that the decisive workaround was:

initcall_blacklist=simpledrm_platform_driver_init

without nomodeset.

That fixed normal graphics boot. After applying it permanently in GRUB,
the machine now boots normally on kernel 7.0.0-31.

I am posting this because the PSP LOAD_TA(0x1) error on my
Picasso/Raven2 system appears alongside the simpledrm/amdgpu handoff
failure. I don't know whether the two issues are causally related, but
the combination may be useful when comparing affected systems.

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https://bugs.launchpad.net/bugs/2102188

Title:
  amdgpu: Secure display: Generic Failure

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