Bug#867548: New HDMI audio video IOMMU issues in Bullseye upgrade on Haswell are old
Bryan Cebuliak
bryan.cebuliak at gmail.com
Sun Jul 4 02:21:41 BST 2021
Ubuntu 20.04:
dmesg | grep -e DMAR -e IOMMU
[ 0.007620] ACPI: DMAR 0x00000000D8FFEAE8 0000B8 (v01 INTEL HSW
00000001 INTL 00000001)
[ 0.007633] ACPI: Reserving DMAR table memory at [mem
0xd8ffeae8-0xd8ffeb9f]
[ 0.097851] DMAR: Host address width 39
[ 0.097852] DMAR: DRHD base: 0x000000fed90000 flags: 0x0
[ 0.097855] DMAR: dmar0: reg_base_addr fed90000 ver 1:0 cap
c0000020660462 ecap f0101a
[ 0.097856] DMAR: DRHD base: 0x000000fed91000 flags: 0x1
[ 0.097858] DMAR: dmar1: reg_base_addr fed91000 ver 1:0 cap
d2008020660462 ecap f010da
[ 0.097858] DMAR: RMRR base: 0x000000dbcf6000 end: 0x000000dbd03fff
[ 0.097859] DMAR: RMRR base: 0x000000dd000000 end: 0x000000df1fffff
[ 0.097861] DMAR-IR: IOAPIC id 8 under DRHD base 0xfed91000 IOMMU 1
[ 0.097861] DMAR-IR: HPET id 0 under DRHD base 0xfed91000
[ 0.097862] DMAR-IR: Queued invalidation will be enabled to support
x2apic and Intr-remapping.
[ 0.098256] DMAR-IR: Enabled IRQ remapping in x2apic mode
On Sat, 3 Jul 2021 at 17:28, Bryan Cebuliak <bryan.cebuliak at gmail.com>
wrote:
> bullseye with intel_iommu=on,igfx_off:
> sudo dmesg | grep -e DMAR -e IOMMU
> [ 0.007516] ACPI: DMAR 0x00000000D8FFEAE8 0000B8 (v01 INTEL HSW
> 00000001 INTL 00000001)
> [ 0.007531] ACPI: Reserving DMAR table memory at [mem
> 0xd8ffeae8-0xd8ffeb9f]
> [ 0.019109] DMAR: Disable GFX device mapping
> [ 0.047926] DMAR: Host address width 39
> [ 0.047926] DMAR: DRHD base: 0x000000fed90000 flags: 0x0
> [ 0.047930] DMAR: dmar0: reg_base_addr fed90000 ver 1:0 cap
> c0000020660462 ecap f0101a
> [ 0.047930] DMAR: DRHD base: 0x000000fed91000 flags: 0x1
> [ 0.047932] DMAR: dmar1: reg_base_addr fed91000 ver 1:0 cap
> d2008020660462 ecap f010da
> [ 0.047933] DMAR: RMRR base: 0x000000dbcf6000 end: 0x000000dbd03fff
> [ 0.047934] DMAR: RMRR base: 0x000000dd000000 end: 0x000000df1fffff
> [ 0.047936] DMAR-IR: IOAPIC id 8 under DRHD base 0xfed91000 IOMMU 1
> [ 0.047937] DMAR-IR: HPET id 0 under DRHD base 0xfed91000
> [ 0.047937] DMAR-IR: Queued invalidation will be enabled to support
> x2apic and Intr-remapping.
> [ 0.048327] DMAR-IR: Enabled IRQ remapping in x2apic mode
> [ 0.793666] DMAR: No ATSR found
> [ 0.793696] DMAR: dmar1: Using Queued invalidation
> [ 0.795240] DMAR: Intel(R) Virtualization Technology for Directed I/O
> [ 0.799207] AMD-Vi: AMD IOMMUv2 driver by Joerg Roedel <jroedel at suse.de
> >
> [ 0.799207] AMD-Vi: AMD IOMMUv2 functionality not available on this
> system
>
>
> bullseye with no intel_iommu command line setting:
> dmesg | grep -e DMAR -e IOMMU
> [ 0.007532] ACPI: DMAR 0x00000000D8FFEAE8 0000B8 (v01 INTEL HSW
> 00000001 INTL 00000001)
> [ 0.007546] ACPI: Reserving DMAR table memory at [mem
> 0xd8ffeae8-0xd8ffeb9f]
> [ 0.048030] DMAR: Host address width 39
> [ 0.048031] DMAR: DRHD base: 0x000000fed90000 flags: 0x0
> [ 0.048034] DMAR: dmar0: reg_base_addr fed90000 ver 1:0 cap
> c0000020660462 ecap f0101a
> [ 0.048035] DMAR: DRHD base: 0x000000fed91000 flags: 0x1
> [ 0.048037] DMAR: dmar1: reg_base_addr fed91000 ver 1:0 cap
> d2008020660462 ecap f010da
> [ 0.048037] DMAR: RMRR base: 0x000000dbcf6000 end: 0x000000dbd03fff
> [ 0.048038] DMAR: RMRR base: 0x000000dd000000 end: 0x000000df1fffff
> [ 0.048040] DMAR-IR: IOAPIC id 8 under DRHD base 0xfed91000 IOMMU 1
> [ 0.048040] DMAR-IR: HPET id 0 under DRHD base 0xfed91000
> [ 0.048041] DMAR-IR: Queued invalidation will be enabled to support
> x2apic and Intr-remapping.
> [ 0.048426] DMAR-IR: Enabled IRQ remapping in x2apic mode
> [ 0.794120] DMAR: No ATSR found
> [ 0.794149] DMAR: dmar0: Using Queued invalidation
> [ 0.794154] DMAR: dmar1: Using Queued invalidation
> [ 0.863652] DMAR: Intel(R) Virtualization Technology for Directed I/O
> [ 0.867732] AMD-Vi: AMD IOMMUv2 driver by Joerg Roedel <jroedel at suse.de>
>
> [ 0.867733] AMD-Vi: AMD IOMMUv2 functionality not available on this
> system
> [ 1.250394] i915 0000:00:02.0: [drm] DMAR active, disabling use of
> stolen memory
>
> buster no intel_iommu setting:
> dmesg | grep -e DMAR -e IOMMU
> [ 0.009193] ACPI: DMAR 0x00000000D8FFEAE8 0000B8 (v01 INTEL HSW
> 00000001 INTL 00000001)
> [ 0.192242] DMAR: Host address width 39
> [ 0.192243] DMAR: DRHD base: 0x000000fed90000 flags: 0x0
> [ 0.192246] DMAR: dmar0: reg_base_addr fed90000 ver 1:0 cap
> c0000020660462 ecap f0101a
> [ 0.192246] DMAR: DRHD base: 0x000000fed91000 flags: 0x1
> [ 0.192248] DMAR: dmar1: reg_base_addr fed91000 ver 1:0 cap
> d2008020660462 ecap f010da
> [ 0.192249] DMAR: RMRR base: 0x000000dbcf6000 end: 0x000000dbd03fff
> [ 0.192249] DMAR: RMRR base: 0x000000dd000000 end: 0x000000df1fffff
> [ 0.192251] DMAR-IR: IOAPIC id 8 under DRHD base 0xfed91000 IOMMU 1
> [ 0.192251] DMAR-IR: HPET id 0 under DRHD base 0xfed91000
> [ 0.192252] DMAR-IR: Queued invalidation will be enabled to support
> x2apic and Intr-remapping.
> [ 0.192637] DMAR-IR: Enabled IRQ remapping in x2apic mode
> [ 0.846867] AMD IOMMUv2 driver by Joerg Roedel <jroedel at suse.de>
> [ 0.846867] AMD IOMMUv2 functionality not available on this system
>
> On Sat, 3 Jul 2021 at 02:22, Bryan Cebuliak <bryan.cebuliak at gmail.com>
> wrote:
>
>> If igfx_off is default, how / why is it on?
>> from
>> https://www.kernel.org/doc/html/latest/admin-guide/kernel-parameters.html
>> "...
>>
>> intel_iommu= [DMAR] Intel IOMMU driver (DMAR) option
>> on
>> Enable intel iommu driver.
>> off
>> Disable intel iommu driver.
>> igfx_off [Default Off]
>> By default, gfx is mapped as normal device. If a gfx
>> device has a dedicated DMAR unit, the DMAR unit is
>> bypassed by not enabling DMAR with this option. In
>> this case, gfx device will use physical address for
>> DMA.
>> ...
>>
>>
>> On Sat, 3 Jul 2021 at 01:25, Bryan Cebuliak <bryan.cebuliak at gmail.com>
>> wrote:
>>
>>> more possibly relevant IOMMU video audio and passthrough issue links:
>>> Easy ACS kernel patch guide for Ubuntu 20.04
>>> https://www.youtube.com/watch?v=JBEzshbGPhQ
>>>
>>>
>>> https://forum.level1techs.com/t/intel-graphics-hdmi-audio-fails-after-enabling-intel-iommu-on/168827
>>>
>>> kvm-gpu-passthrough-on-debian-buster.md
>>> https://gist.github.com/davesilva/445276f9157e7cb3a4f6ed2fe852b340
>>>
>>>
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