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Published 3 months ago • verified publisher icon mpv-player

Little crackling/popping on Linux ARM64.

Open HanoJing opened this issue 3 years ago • 4 comments

Important Information

  • mpv version: 0.34.1-r1
  • Linux Distribution and Version: Gentoo GNU/Linux ARM64; Kernel: 5.19.7 (SolidRun Vendor Kernel (https://github.com/SolidRun/linux-stable/tree/linux-5.19.y-cex7-dev)
  • Source of the mpv binary: Gentoo GNU/Linux gentoo repository
  • Window Manager and version: Suckless' dwm (https://github.com/bakkeby/dwm-flexipatch)
  • GPU driver and version: AMDGPU AMD Radeon RX580 XFX driver from linux-firmware-20220815

Reproduction steps

Play music, hear little poppling/crackling

Expected behavior

Sound plays without poppling/crackling

Actual behavior

Sound plays with little poppling/crackling

Log file

https://0x0.st/oOHy.txt

Important Notes

Motherboard: SolidRun HoneyComb LX2K CPU: NXP LayerScape LX2160A ARM Cortex-A72 GPU: AMD Radeon RX580 XFX

I use the 5.19.7 SolidRun Vendor Kernel that only works with a recent and specific UEFI image. The Sound didn't crackle/pop with the 5.15.10 Vendor Kernel and the older UEFI image. I am able to reproduce crackling/popping on the PINE64 RockPro64 too (https://www.pine64.org/rockpro64/) but a lot less than what I get on the HoneyComb. I am not able to reproduce this issue on a Thinkpad X230 both with just alsa running and pipewire running.

The issue disappears on my HoneyComb when I open SuperTuxkart for example but not neccesarily when the GPU is under higher load.

Crackling/popping happens especially with the song: Clean Bandit ft. Ellie Goulding - MAMA (Kertscher Remix)

I verified that this only happens with mpv. This does not happen with Freetube, Youtube in Firefox, nor ffplay.

The same popping/crackling is reproducible on Void Linux (mpv version: 0.34.1 and armtix(mpv version: 0.34.1-5)(https://armtixlinux.org) aswell as Fedora 36 (mpv version:0.34.1-3).

on my HoneyComb, I get sound from my GPU, over Displayport, to 3.5mm headphone jack speakers. On The RockPro64 I get sound over its Analog output, straight to the 3.5mm jack.

I tried some options out, regarding audio, to maybe set a value that the GPU likes. It maybe fixable this way.

Thank you all very much in advance.

HanoJing avatar Sep 12 '22 18:09 HanoJing

What happens if you use --ad=mp3?

Traneptora avatar Sep 13 '22 16:09 Traneptora

That sadly doesn't fix it. By the way, all the Music I test with is in the mp3 format.

ghost avatar Sep 13 '22 18:09 ghost

Also, what happens if you play the song off youtube, from mpv? e.g. mpv 'ytdl://https://www.youtube.com/watch?v=yNWFtWDnD8A'

Traneptora avatar Sep 17 '22 16:09 Traneptora

Thanks alot for the idea!

Playing it like this: mpv 'ytdl://https://www.youtube.com/watch?v=yNWFtWDnD8A' does not cause crackling as the graphics card is under higher load.

Playing it like this: mpv --no-video 'ytdl://https://www.youtube.com/watch?v=yNWFtWDnD8A' does cause crackling.

Same for this video: https://www.youtube.com/watch?v=4JvVowaLBlc

ghost avatar Sep 17 '22 20:09 ghost

The fix for this is to set amdgpu.pcie_gen_cap=0x4 in the GRUB_CMDLINE_LINUX_DEFAULT= in /etc/default/grub.

ghost avatar Feb 24 '23 19:02 ghost