Re: amdgpu causes boot failure after BIOS update AGESA ComboAM5 1.3.0.1a on Asrock X600

[Johannes Stezenbach <js@sig21.net>]

On Thu, Oct 15, 2026 at 11:17:57AM +0200, Johannes Stezenbach wrote:
> 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.

So I thought. But I had also enabled EFI_STUB because the
Debian kernel had it, but it causes "failed to unprotect
memory range at..." messages. Thus now after kernel upgrade
to 7.2.13 I disabled it -> can't boot.
Setting this is needed with BIOS v4.23:

CONFIG_EFI_STUB=y
CONFIG_EFI_HANDOVER_PROTOCOL=y  (maybe, =n not tested)


Johannes