[Bug 2091565] Re: Crackling and skipping audio via amdgpu HDMI/DP since linux-image-6.8.0-50-generic

Confirmed this is a problem for me too.


echo "options snd-hda-intel snoop=0" | sudo tee /etc/modprobe.d/hdmisoundfix.conf
sudo update-initramfs -u -k all


Worked for me (but only use one output device).

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https://bugs.launchpad.net/bugs/2091565

Title:
Crackling and skipping audio via amdgpu HDMI/DP since linux-
image-6.8.0-50-generic

Status in Linux:
Fix Released
Status in linux package in Ubuntu:
Confirmed

Bug description:
Since the update to Linux 6.8.0-50-generic, HDMI/DP audio output
crackles and skips, and is completely unusable. This is via an AMD
Radeon RX 550 using the default amdgpu driver.

I have no issues with my USB DAC or the analog and SPDIF outputs of my
onboard sound card. They all work fine.

The problem is caused by conditional snooping being enabled for AMD
GPU's. This patch has been reverted upstream in the Linux kernel
because it breaks a lot of hardware. Debian has also reverted the
patch in all of their kernels.

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1081833
https://bugzilla.kernel.org/show_bug.cgi?id=219087
https://www.spinics.net/lists/stable-commits/msg376549.html

Rebooting and selecting Linux 6.8.0-49-generic in GRUB completely
solves the issue, so I am 100% sure this is a regression in the latest
kernel and not a hardware issue.

So please revert "ALSA: hda: Conditionally use snooping for AMD HDMI".

ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: linux-image-6.8.0-50-generic 6.8.0-50.51
ProcVersionSignature: Ubuntu 6.8.0-50.51-generic 6.8.12
Uname: Linux 6.8.0-50-generic x86_64
ApportVersion: 2.28.1-0ubuntu3.1
Architecture: amd64
CasperMD5CheckResult: unknown
Date: Wed Dec 11 16:37:20 2024
HibernationDevice: RESUME=UUID=5d72bb4c-ca50-4252-ada7-c6f8c515d0a5
MachineType: ASUS P8Z77-V
ProcEnviron:
 LANG=nl_NL.UTF-8
 PATH=(custom, no user)
 SHELL=/bin/bash
 TERM=xterm-256color
 XDG_RUNTIME_DIR=<set>
ProcFB: 0 amdgpudrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-6.8.0-50-generic root=UUID=81f554dc-4199-4f5c-a5a5-0d5436da969a ro quiet splash loglevel=3 vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-6.8.0-50-generic N/A
 linux-backports-modules-6.8.0-50-generic N/A
 linux-firmware 20240318.git3b128b60-0ubuntu2.5
SourcePackage: linux
UpgradeStatus: Upgraded to noble on 2024-04-20 (235 days ago)
dmi.bios.date: 05/14/2024
dmi.bios.release: 24.5
dmi.bios.vendor: coreboot
dmi.bios.version: 24.05
dmi.board.name: P8Z77-V
dmi.board.vendor: ASUS
dmi.board.version: 1.0
dmi.chassis.type: 3
dmi.chassis.vendor: ASUS
dmi.ec.firmware.release: 0.0
dmi.modalias: dmi:bvncoreboot:bvr24.05:bd05/14/2024:br24.5:efr0.0:svnASUS:pnP8Z77-V:pvr1.0:rvnASUS:rnP8Z77-V:rvr1.0:cvnASUS:ct3:cvr:sku:
dmi.product.name: P8Z77-V
dmi.product.version: 1.0
dmi.sys.vendor: ASUS

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