** Description changed: 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. + 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. - 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. + 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. + 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> + 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 + 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
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2091565 Title: Crackling and skipping audio via amdgpu HDMI/DP since linux- image-6.8.0-50-generic To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/2091565/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
