Re: Failure to shutdown/reboot with intel_iommu=on

[Uwe Kleine-KÃnig]

Hello Lenny,

On 5/11/20 3:43 PM, Lenny Szubowicz wrote:
> I suspect that you have TPM 2.x functionality enabled in the BIOS/firmware.

Indeed.

> Unless you are actually using the TPM, try setting it to TPM 1.2 mode.
> I've seen an incompatiblity on other Lenovo laptops between using the
> IOMMU, TPM 2.x implementation in firmware, and shutdown/suspend.

When setting it to TPM 1.2 reboot works again. Didn't test poweroff and
suspend/resume yet.

Best regards
Uwe

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