[Hardware] AMDGPU SecureDisplay / Warm Boot Failure – ThinkPad X13 Gen 1 (Kubuntu 25.10, Kernel 6.17)

[cezvania]

System Info:

• ThinkPad X13 Gen 1
• Kubuntu 25.10, kernel 6.17.0-6-generic
• BIOS/System Firmware: 0.1.52
• GPU: Integrated AMDGPU (Renoir / Vega)

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Symptoms

• On battery, sometimes fails to boot the display:
  • Secure display: Generic Failure in dmesg
  • Or blank screen (backlit, but no image)
• Cold boot may work; warm reboot is more likely to fail.
• Boots reliably on AC only in some cases.

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Steps to Reproduce

1. Boot laptop on battery → observe SecureDisplay error or blank screen.
2. Boot on AC, then warm reboot → often results in blank screen or SecureDisplay failure.
3. Repeat multiple cold/warm boots; behavior is intermittent but reproducible.

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Diagnostics

• dmesg | grep -i amdgpu shows PSP / DMUB initialization failures:

psp gfx command LOAD_TA(0x1) failed psp gfx command INVOKE_CMD(0x3) failed Secure display: Generic Failure SECUREDISPLAY: query securedisplay TA failed. ret 0x0

• Kernel 6.17 ignores amdgpu.securedisplay=0.
• Runtime PM disabled (amdgpu.runpm=0 prevents GPU sleep).
• Display Core (DCN 2.1) eventually initializes, but SecureDisplay handshake fails.

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Temporary Workarounds

• GRUB parameter:

quiet splash amdgpu.runpm=0

• Prevents GPU runtime PM, improving warm boot reliability.
• Older kernel (≤6.16) + amdgpu.securedisplay=0 may restore full stability, but not ideal long-term.

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Impact

• Laptop unreliable on battery.
• Cannot guarantee display initialization without AC.
• Workarounds are incomplete for warm reboot scenarios.

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Request / Notes

• Lenovo: Investigate PSP / EC warm boot sequence on X13 Gen 1, especially on battery.
• Canonical / AMDGPU: Fix SecureDisplay / DMUB handshake in kernel ≥6.17 for warm boots.
• Goal: Stable cold & warm boots on battery without manual kernel parameters.

Any long term fixes?