Arch Linux @lemmy.ml 0WN3D @lemmy.cafe 1y ago

[Resolved] Missing audio with MPV + Wayland

So I know my setup is really niche, but here goes nothing

I am using Arch Pi on Pi 4
Installed cage as a lightweight Wayland compositor
Installed mpv + wireplumber + pipewire

I am not quite sure how to use cage to launch a simple "Wayland session (if it even makes sense)", so that I can send MPV to that display. So I tried cage -s alacritty :1, and it does launch alacritty with it detecting that it is on wayland.

But when I do DISPLAY=:1 mpv ...., the video runs, but there's no audio. Also there's no errors shown on mpv either.

The other thing of note is that I tried cage -s Xwayland :1 and the audio+video works perfectly.

So in all:

How do I launch cage to spawn a simple Wayland session? Is this even possible?
How do I solve the audio issue on Wayland?

EDIT: Thanks all for the help. After some investigation, I found out the pipewire somehow is not ran on startup of alacritty, but it did for Xwayland. I noticed that the first play of the video would be audio-less on alacritty, and subsequent ones are fine. It seems like the first run causes pipewire to be started and thus I wrongfully assumed that the daemon was running.

Still strange nonetheless...

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8 comments

I imagine these are two separate issues. I'll attack the audio as I don't know much about cage, albeit, are you running it from a tty on login or do you have a display manager (e.g. gdm, sddm)

Can you dump your installed packages with pacman -Qe and post it here? I'll compare it to mine.

My audio setups have been pretty... interesting in the past. Normally, I prefer to do everything in the terminal, but pavucontrol can be pretty handy.

Other than that, you might try reading the man page for pactl.
- are you running it from a tty on login
  
  Yea, directly on tty.
  
  I imagine these are two separate issues.
  
  I'd think they are related since mpv is working fine on Xwayland but not when I launch alacritty instead
  
  Can you dump your installed packages with pacman -Qe and post it here? I’ll compare it to mine.
  
  alacritty 0.12.2-1 ani-cli 4.6-1 archlinuxarm-keyring 20140119-2 base 3-1 base-devel 1-1 bat 0.23.0-3 cage 0.1.5-1 dhcpcd 10.0.2-1 dialog 1:1.3_20230209-1 linux-rpi 6.1.54-1 lobster 4.0.0-1 man-db 2.11.2-1 neovim 0.9.1-1 net-tools 2.10-2 netctl 1.28-2 noto-fonts 1:23.9.1-1 opendoas 6.8.2-1 openssh 9.4p1-4 pacman-contrib 1.9.1-1 raspberrypi-bootloader 20230921-1 raspberrypi-firmware 20230921-1 ripgrep 13.0.0-3 socat 1.7.4.4-1 tmux 3.3_a-7 vi 1:070224-6 which 2.21-6 wireless-regdb 2023.09.01-1 wireless_tools 30.pre9-3 wpa_supplicant 2:2.10-8 xorg-xwayland 23.2.1-1
  
  Seems like a pretty minimal config. I can respect that. Have you tried running with a display manager? E.g. sddm. They will often start with additional options you wouldn't have starting from tty.
  
  If sddm does work, you can cat /etc/sddm.conf I believe to see the options it uses and use those when you start from tty
  
  For the audio, try installing pipewire-pulse
  
  Finally, arch for arm isn't officially supported. Your issues could stem from that. You might consider playing around in a VM with both versions to see if you can reproduce your problem.

8 comments