alsa-project/alsa-utils issue #244 was opened from hrdl-github:
Since ef0e588c76fbad4112193d311e51a60d18b44282, `alsactl restore $attr{device/number}` has been used instead of `alsactl restore $attr{number}`. On my system this results in an empty expansion, causing unwanted changes in volume (see https://gitlab.freedesktop.org/pipewire/wireplumber/-/issues/516). The `card*` kernel does have a `number` attribute though:
```
looking at device '/devices/pci0000:00/0000:00:1f.3/sound/card1/controlC1':
KERNEL=="controlC1"
SUBSYSTEM=="sound"
DRIVER==""
ATTR{power/control}=="auto"
ATTR{power/runtime_active_time}=="0"
ATTR{power/runtime_status}=="unsupported"
ATTR{power/runtime_suspended_time}=="0"
looking at parent device '/devices/pci0000:00/0000:00:1f.3/sound/card1':
KERNELS=="card1"
SUBSYSTEMS=="sound"
DRIVERS==""
ATTRS{id}=="PCH"
ATTRS{number}=="1"
ATTRS{power/control}=="auto"
ATTRS{power/runtime_active_time}=="0"
ATTRS{power/runtime_status}=="unsupported"
ATTRS{power/runtime_suspended_time}=="0"
```
Issue URL : https://github.com/alsa-project/alsa-utils/issues/244
Repository URL: https://github.com/alsa-project/alsa-utils
