Bug 503816

## Description

After resuming from suspend on a freshly installed **Kubuntu 25.04 (x86_64)** system with KDE Plasma (Wayland) and PipeWire, the **Sennheiser GSX 1000** USB DAC remains detected and is still listed as the default audio output device. However, **no sound is heard** through it until the device is physically unplugged or reset via software.

The device stays listed with a valid output sink (`analog-output-surround71`) and is shown as active in `wpctl status`, but does not produce audio unless reset.

## Workaround

To automate recovery, I added a systemd sleep hook to trigger a soft USB reset using `usb_modeswitch`:

**/lib/systemd/system-sleep/fix-gsx1000**

```bash
#!/bin/bash
[ "$1" == "post" ] && $(which usb_modeswitch) -v 1395 -p 00a0 -R
exit 0
```

This consistently restores audio after suspend/resume.

## System Information

* **OS:** Kubuntu 25.04 x86_64 (fresh install)
* **Kernel:** `6.14.0-15-generic`
* **PipeWire version:** 1.2.7
  (`pipewire --version`: Compiled and linked with libpipewire 1.2.7)
* **systemd version:** 257 (257.4-1ubuntu3)
* **Audio device:** Sennheiser GSX 1000 (USB ID: `1395:00a0`)
* **Desktop:** KDE Plasma (Wayland session)

Feel free to ask for more information if needed

Thanks in advance!