Public bug reported:
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.
I think the issue has something to do with buffer sizes reported to
Pipewire / Wireplumber.
For instance, when I run `speaker-test -c 2 -t wav -D hw:2,8` the output
sounds fine. But when I set Pipewire to output via the HDMI/DP output
using GNOME, the audio skips and crackles immensely.
Lowering the quantum size with `pw-metadata -n settings 0 clock.force-
quantum 8` helps a bit, but the audio is still far from perfect.
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.
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
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug noble
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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
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