linux-kernel - Re: Failure to shutdown/reboot with intel

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Message-ID: <20200512133429.GZ8135@suse.de>
Date:   Tue, 12 May 2020 15:34:29 +0200
From:   Joerg Roedel <jroedel@...e.de>
To:     Lenny Szubowicz <lszubowi@...hat.com>
Cc:     Uwe Kleine-König <uwe@...ine-koenig.org>,
        linux-kernel@...r.kernel.org, rafael.j.wysocki@...el.com,
        tglx@...utronix.de, x86@...nel.org,
        Lu Baolu <baolu.lu@...ux.intel.com>
Subject: Re: Failure to shutdown/reboot with intel_iommu=on

On Mon, May 11, 2020 at 09:43:11AM -0400, Lenny Szubowicz wrote:
> I suspect that you have TPM 2.x functionality enabled in the BIOS/firmware.
> 
> 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.

Interesting, has this been debugged further into the TPM code?


	Joerg