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I am experiencing difficulties with PulseAudio properly recognizing my USB headphones, HyperX Cloud Alpha S, as an audio device. Although the headphones are detected by the system (confirmed with lsusb), PulseAudio seems to not correctly assign the device, resulting in the inability to select them as an audio output from the system settings.
Verified that the headphones are being recognized by the system using the lsusb command and confirmed their presence.
Attempted to set the headphones as the default device using commands like pactl set-default-sink, but was unsuccessful and received error messages such as "Failure: No such entity."
Checked the list of output devices with pactl list short sinks, but did not find the entry corresponding to my HyperX Cloud Alpha S.
Additional Information:
I have tried to modify the file /etc/modprobe.d/alsa-base.conf with the line options snd-usb-audio index=0, but it has not resolved the issue. When executing sudo modprobe -r snd_usb_audio, I receive the message "modprobe: FATAL: Module snd_usb_audio is in use."
When connecting 3.5mm headphones, the system automatically recognizes them, and the sound is correctly redirected.
In pavucontrol, the USB headphones appear as "headphones unplugged."
The system is running Arch Linux.
The output of aplay -l initially displayed the HyperX Cloud Alpha S headphones, but this information is no longer present after making some changes.
The PulseAudio configuration file (~/.config/pulse/default.pa) appears to be empty.
The output of pacmd list-sinks does not include an entry for the USB headphones.
Error details:
[ 85.944474] snd-usb-audio 2-1.6:1.0: cannot find the slot for index 0 (range 0-1), error: -16
[ 85.944483] usb 2-1.6: cannot create card instance 0
[ 85.944487] snd-usb-audio: probe of 2-1.6:1.0 failed with error -16
[ 85.945471] snd-usb-audio 2-1.6:1.2: cannot find the slot for index 0 (range 0-1), error: -16
[ 85.945479] usb 2-1.6: cannot create card instance 0
[ 85.945482] snd-usb-audio: probe of 2-1.6:1.2 failed with error -16
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I noticed that if I lower the volume from the audio card associated with the headphones, the HDMI audio output also decreases.
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