From: Joerg Roedel <jroedel@suse.de>
To: "Uwe Kleine-König" <uwe@kleine-koenig.org>
Cc: linux-kernel@vger.kernel.org, rafael.j.wysocki@intel.com,
tglx@linutronix.de, x86@kernel.org,
Lu Baolu <baolu.lu@linux.intel.com>
Subject: Re: Failure to shutdown/reboot with intel_iommu=on
Date: Fri, 8 May 2020 17:07:34 +0200 [thread overview]
Message-ID: <20200508150734.GP8135@suse.de> (raw)
In-Reply-To: <20200506144558.GA4019@taurus.defre.kleine-koenig.org>
+ Baolu, Maintainer of Intel IOMMU
Baolu, does that ring any bells?
On Wed, May 06, 2020 at 04:46:02PM +0200, Uwe Kleine-König wrote:
> Hello,
>
> On my Lenovo T460p I cannot shutdown and reboot when the iommu is
> enabled. This is using linux 5.2.7 as provided by Debian, 5.6.4 has the
> same problem. Suspend/resume also fails; I suspect this is the same
> issue.
>
> When requesting power off the kernel messages just end with:
>
> sd 0:0:0:0: [sda] Synchronizing SCSI cache
> sd 0:0:0:0: [sda] Stopping disk
> e1000e: EEE TX LPI TIMER: 00000011
> ACPI: Preparing to enter system sleep state S5
> reboot: Power down
> acpi_power_off called
>
> (photo at https://www.kleine-koenig.org/tmp/uklsiommu.jpg in case I
> mistyped something. Full dmesg and lspci -vvv at
> https://www.kleine-koenig.org/tmp/uklsiommu.tar.gz with and without
> iommu enabled.)
>
> With the iommu disabled (CONFIG_INTEL_IOMMU_DEFAULT_ON unset or
> intel_iommu=off on cmdline) the machine just works as expected
> (including working suspend/resume).
>
> I already talked to tglx on irc but unfortunately no new insights
> resulted from that.
>
> Any ideas how to fix or continue debugging the issue?
>
> Best regards
> Uwe
next prev parent reply other threads:[~2020-05-08 15:07 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-06 14:46 Failure to shutdown/reboot with intel_iommu=on Uwe Kleine-König
2020-05-08 15:07 ` Joerg Roedel [this message]
2020-05-09 1:58 ` Lu Baolu
2020-05-11 19:59 ` Uwe Kleine-König
2020-05-11 20:16 ` Uwe Kleine-König
2020-05-11 13:43 ` Lenny Szubowicz
2020-05-11 19:58 ` Uwe Kleine-König
2020-05-12 13:34 ` Joerg Roedel
2020-05-12 20:00 ` Lenny Szubowicz
2020-05-12 21:13 ` Joerg Roedel
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