Razer Leviathan V2 X: Audio cuts off/muted completely below 34% volume after updating to kernel 7.1.x

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1

After a recent system update that introduced the linux-cachyos 7.1.1 kernel, my USB soundbar Razer Leviathan V2 X (Pro) stopped working properly at lower volume levels.

Whenever the system master volume slider drops below 34% (which corresponds to -27.81 dB in ALSA/alsamixer), the soundbar goes completely silent (hard mute). It seems like the updated USB audio driver (snd-usb-audio) or updated audio profiles in the 7.1 kernel branch send incorrect attenuation steps, triggering the soundbar’s hardware noise gate/power-saving cutoff prematurely.

Steps to reproduce:

  1. Connect Razer Leviathan V2 X via USB.

  2. Play any media (e.g., YouTube in Firefox).

  3. Decrease the system volume slider below 34%.

  4. The audio completely cuts off, even though the OS mixer indicates that sound is still playing.

Environment & Versions:

  • OS: CachyOS (x86_64_v3 architecture)

  • Audio Server: PipeWire / WirePlumber

  • Broken Kernel: linux-cachyos 7.1.1-2 (and newer 7.1.x releases)

  • Broken Package: alsa-card-profiles 1:1.6.7-1.1 (when paired with 7.1 kernel)

  • Hardware affected: Razer Leviathan V2 X / Razer Leviathan V2 X Pro (USB connection)

Current Workaround:
Downgrading back to the linux-cachyos 7.0.12-1 kernel and alsa-card-profiles 1:1.6.5-2.1 completely fixes the issue. On the 7.0.x kernel branch, the volume attenuation scales perfectly and smoothly all the way down to 1% without any hardware mute/cutoff.

Software-mixer overrides via WirePlumber (api.alsa.soft-mixer = true and api.alsa.ignore-dB = true) do not resolve the issue on the 7.1.x kernel, confirming it is an upstream driver/kernel regression regarding how the USB mixer grid handles this specific Razer device.

2

An update on this: the latest package updates (7.1.2-3) unfortunately did not fix the issue. The audio still completely cuts off at lower volumes.

After doing some additional troubleshooting with rolling back packages, I can confirm that:

  1. The regression is strictly tied only to these two kernel packages:
    • linux-cachyos
    • linux-cachyos-headers
  2. Rolling back or updating alsa-card-profiles does not affect the issue at all.

So the bug seems to be entirely introduced within the linux-cachyos 7.1.x kernel itself.

3

I have also investigated the behavior in alsamixer before and after the update.

On the working 7.0.x kernel, there are two volume sliders available for the device: PCM and PCM 1 (as shown in the screenshot below).

However, after updating to the 7.1.x kernel, the following happens:

  1. The second slider (PCM 1) completely disappears from alsamixer.
  2. The first slider (PCM) immediately drops to 0 as soon as the system master volume goes below 34%.

This strongly suggests that the updated kernel driver fails to properly detect and map the dual-slider mixer topology of the Razer Leviathan V2 X USB mixer grid, causing a premature hard mute.

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