Re: [REGRESSION] no TPM device after "tpm_crb: Convert ACPI driver to a platform one"

On Thu, Aug 6, 2026 at 11:55 AM Julien <[email protected]> wrote:
>
> > Please try the attached patch and let me know how it goes.
> >
> > It applies on top of the current mainline, but it may be adjusted to
> > older kernels, so please let me know if you need that.
>
> Thanks. The patch seems to be working. /dev/tpm0 and /dev/tpmrm0 are
> back and a command like tpm2_get_random 16 succeeds.
>
> > I think that these messages have been present in the kernel logs for
> > quite some time, but previously they were not connected to any
> > functional issues.
>
> You are right that the messages were already present before. I see
> them in the commit before "tpm_crb: Convert ACPI driver to a platform
> one".
>
> Here is what the logs say now:
> acpi MSFT0101:00: Adjusting resource [mem 0xfed4000-0xfed40fff] to
> [mem 0xfed40040-0xfed4103f]
> tpm_crb_acpi MSFT0101:00: [Firmware Bug]: Bad ACPI memory layout
>
> The second message was already there before too.
>
> I'm sorry for sending multiple times the same email. I'm still learning.

No worries.  I sometimes do that too.