I can confirm that this bug affects me in Debian Bookworm (kernel 6.1) +
Pipewire with this hardware (and a DisplayPort -> HDMI adapter):
================================================
System:
Host: T440s Kernel: 6.1.0-13-amd64 arch: x86_64 bits: 64 Desktop: Cinnamon
v: 5.6.8 Distro: Debian GNU/Linux 12 (bookworm)
Machine:
Type: Laptop System: LENOVO product: 20AR006RUS v: ThinkPad T440s
Mobo: LENOVO model: 20AR006RUS v: SDK0E50510 PRO
UEFI: LENOVO v: GJETA4WW (2.54 )
date: 03/27/2020
CPU:
Info: dual core Intel Core i5-4300U [MT MCP] speed (MHz): avg: 805
min/max: 800/2900
Graphics:
Device-1: Intel Haswell-ULT Integrated Graphics driver: i915 v: kernel
Device-2: Chicony Integrated Camera type: USB driver: uvcvideo
Display: x11 server: X.Org v: 1.21.1.7 driver: X: loaded: modesetting
unloaded: fbdev,vesa dri: crocus gpu: i915 resolution: 1366x768~60Hz
API: OpenGL v: 4.6 Mesa 22.3.6 renderer: Mesa Intel HD Graphics 4400 (HSW
GT2)
Network:
Device-1: Intel Ethernet I218-LM driver: e1000e
Device-2: Intel Wireless 7260 driver: iwlwifi
Device-3: Intel Bluetooth wireless interface type: USB driver: btusb
================================================
I also tried the Debian Backports 6.4 kernel with the same results.
The workaround suggested earlier in this report works:
> edit /etc/default/grub to add
> GRUB_CMDLINE_LINUX_DEFAULT="intel_iommu=on,igfx_off"
However, it should be noted that openSUSE Tumbleweed + Pipewire on this same
hardware does *NOT* have this bug.
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https://bugs.launchpad.net/bugs/1428121
Title:
Intel HDMI Audio not working with IOMMU enabled
Status in ALSA driver:
Confirmed
Status in alsa-driver package in Ubuntu:
Confirmed
Bug description:
New ASRock Z97 Extreme 6 motherboard with an Intel i7 4790S and an
Nvidia GTX 650.
Host uses Intel IGD for video and HDMI audio out.
When I pass kernel flags 'intel_iommu=on' or 'intel_iommu=on,igfx_on'
HDMI audio no longer functions although the device and modules seem to
load and I cannot locate any error messages. In this configuration
IOMMU functions as expected and I can successfully pass the Nvidia
card through to a KVM guest using VFIO.
As per this
(https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1223840) bug
report and the linked bugzilla thread I attempted to use kernel flag
'intel_iommu=on,igfx_off'. This resolves the HDMI audio out but
breaks IOMMU as in VGA pass through generates DMA errors.
I'm running from a clean installation of 14.10 with no modifications
to the kernel or kvm, qemu, libvirt or virt-manager.
In either scenario above the analogue audio out continues to function,
I haven't tested the optical out as I have no hardware to do so.
ProblemType: Bug
DistroRelease: Ubuntu 14.10
Package: linux-image-3.16.0-31-generic 3.16.0-31.41
ProcVersionSignature: Ubuntu 3.16.0-31.41-generic 3.16.7-ckt5
Uname: Linux 3.16.0-31-generic x86_64
ApportVersion: 2.14.7-0ubuntu8.2
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC2: kelvin 3468 F.... pulseaudio
/dev/snd/controlC3: kelvin 3468 F.... pulseaudio
/dev/snd/controlC0: kelvin 3468 F.... pulseaudio
/dev/snd/controlC1: kelvin 3468 F.... pulseaudio
CurrentDesktop: Unity
Date: Wed Mar 4 12:53:17 2015
HibernationDevice: RESUME=UUID=4d35060a-85c4-45fd-9f8e-530491588931
InstallationDate: Installed on 2015-02-26 (5 days ago)
InstallationMedia: Ubuntu-Server 14.10 "Utopic Unicorn" - Release amd64
(20141022.2)
MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M.
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-31-generic.efi.signed
root=UUID=4914f227-6bb0-40bb-a781-9ad7111a996f ro intremap=no_x2apic_optout
intel_iommu=on,forcedac pci-stub.ids=10de:11c8,10de:0e0b nomdmonddf nomdmonisw
RelatedPackageVersions:
linux-restricted-modules-3.16.0-31-generic N/A
linux-backports-modules-3.16.0-31-generic N/A
linux-firmware 1.138.1
RfKill:
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 12/17/2014
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: P1.70
dmi.board.name: Z97 Extreme6
dmi.board.vendor: ASRock
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: To Be Filled By O.E.M.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvrP1.70:bd12/17/2014:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnZ97Extreme6:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.name: To Be Filled By O.E.M.
dmi.product.version: To Be Filled By O.E.M.
dmi.sys.vendor: To Be Filled By O.E.M.
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