+ 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
