Hi, On Fri, Oct 02, 2026 at 09:25:22PM +0200, Johannes Stezenbach wrote: > However, my self-built kernel still crashes early after I changed > amdgpu to be a loadable module. So there is something else going > on, but lets concentrate on the andgpu failure with the Debian kernel.
I was able to resolve this. I went through my kernel config and compared to Debian's and found the following suspicious configurations that had worked with previous BIOS v4.14: CONFIG_PCIEASPM_POWER_SUPERSAVE (should be CONFIG_PCIEASPM_DEFAULT) CONFIG_EFI_DISABLE_PCI_DMA CONFIG_EFI_DISABLE_RUNTIME After disabling them my kernel can boot and runs stable. The issue with occational boot failures in amdgpu persists, but it's not a blocker since it only seems to happen on boot, not on resume from suspend or hibernate. So in practice it happens rarely and can be worked around by just resetting until it boots successfully. I'll keep using the BIOS v4.23. Please let me know if you have any idea about it, or if you think it's also the IOMMU dynamic power gating BIOS issue? Best Regards, Johannes
