The CachyOS sees no sound devices after the fresh install.
The OS is the third on my PC. Others are MX Linux and Endeavour OS. No problems with sound.
How to fix the issue? Step by step, please.
Find out what the other two arch-based ones do differently in terms of sound, especially on a fresh installation 
Jokes aside, the information you provided is just speculation.
In general, it is not a mistake to restart the updated system, even if the system does not indicate this.
Edit: Did you come across similar errors during your research?
Welcome to the community 
If you doesn’t want to help, don’t post.
systemctl status --user pipewire
pacman -Qs pipewire
Show output of both.
You must provide information so that help can be provided.
systemctl status --user pipewire
â—Ź pipewire.service - PipeWire Multimedia Service
Loaded: loaded (/usr/lib/systemd/user/pipewire.service; disabled; preset: enabled)
Active: active (running) since Mon 2024-09-23 16:37:16 MSK; 5min ago
Invocation: e599900d3ceb4c5685aeadb8409a00bd
TriggeredBy: â—Ź pipewire.socket
Main PID: 804 (pipewire)
Tasks: 3 (limit: 28718)
Memory: 3.1M (peak: 4.2M)
CPU: 55ms
CGroup: /user.slice/user-1000.slice/user@1000.service/session.slice/pipewire.service
└─804 /usr/bin/pipewire
sent 23 16:37:16 cos systemd[773]: Started PipeWire Multimedia Service.
=========================
❯ pacman -Qs pipewire
local/gst-plugin-pipewire 1:1.2.4-1
Multimedia graph framework - pipewire plugin
local/kpipewire 6.1.5-1 (plasma)
Components relating to pipewire use in Plasma
local/libpipewire 1:1.2.4-1
Low-latency audio/video router and processor - client library
local/libwireplumber 0.5.6-1
Session / policy manager implementation for PipeWire - client library
local/pipewire 1:1.2.4-1
Low-latency audio/video router and processor
local/pipewire-alsa 1:1.2.4-1
Low-latency audio/video router and processor - ALSA configuration
local/pipewire-audio 1:1.2.4-1
Low-latency audio/video router and processor - Audio support
local/pipewire-pulse 1:1.2.4-1
Low-latency audio/video router and processor - PulseAudio replacement
local/wireplumber 0.5.6-1
Session / policy manager implementation for PipeWire
You must provide information so that help can be provided.
The output looks good, i.e. I can’t find any errors.
Every device is plugged in and active. But in System settings - sound I can see NO devices. And in the system tray I can see no devices.
Have no idea what is going on and where to search for solution. Can it be because of pipewire? Shall I install pulseaudio?
I’m not exactly an expert on sound.
Maybe these links will help you until you get professional help:
No sound on fresh installed Arch / Arch Linux Guided Installer / Arch Linux Forums.
PulseAudio/Troubleshooting - ArchWiki
https://www.reddit.com/r/archlinux/comments/vd9ia8/no_audio_fresh_install/
Thank you so much!
I saw in the Internet, people got this very issue, but I found no clear solution.
What desktop environment are you using?
Can you please provide the output of inxi -A?
Some users report that clicking on the speaker control solved the problem. But that would be too easy 
I use KDE.
`inxi -A
Audio:
Device-1: Intel 7 Series/C216 Family High Definition Audio
driver: snd_hda_intel
Device-2: Advanced Micro Devices [AMD/ATI] Oland/Hainan/Cape
Verde/Pitcairn HDMI Audio [Radeon HD 7000 Series] driver: snd_hda_intel
Device-3: VIA VT1720/24 [Envy24PT/HT] PCI Multi-Channel Audio
driver: snd_ice1724
Device-4: Creative Labs EMU20k1 [Sound Blaster X-Fi Series]
driver: snd_ctxfi
API: ALSA v: k6.10.7-1-cachyos-rt-bore status: kernel-api
Server-1: PipeWire v: 1.2.4 status: active
Can the reason be in pipewire?
I don’t think so. can you try installing LTS kernel? sudo pacman -S linux-cachyos-lts linux-cachyos-lts-headers
Installing lts kernel right now.
I don’t know.
But the information provided should get you professional help soon.
One more question: Are you using x11 or wayland? inxi -G
Now I use the LTS kernel.
Linux cos 6.6.50-1-cachyos-lts #1 SMP PREEMPT_DYNAMIC Tue, 10 Sep 2024 11:48:41 +0000 x86_64 GNU/Linux
nxi -G
Graphics:
Device-1: Advanced Micro Devices [AMD/ATI] Cape Verde PRO [Radeon HD
7750/8740 / R7 250E] driver: amdgpu v: kernel
Display: wayland server: X.org v: 1.21.1.13 with: Xwayland v: 24.1.2
compositor: kwin_wayland driver: N/A resolution: 1920x1200
API: EGL v: 1.5 drivers: kms_swrast,radeonsi,swrast
platforms: gbm,wayland,x11,surfaceless,device
API: OpenGL v: 4.6 compat-v: 4.5 vendor: amd mesa v: 24.2.2-arch1.3
renderer: AMD Radeon HD 7700 Series (radeonsi verde LLVM 18.1.8 DRM 3.54
6.6.50-1-cachyos-lts)
API: Vulkan v: 1.3.295 drivers: radv surfaces: xcb,xlib,wayland
Sound devices are still not present?
Sound is absent. No sound devices in menus.