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systemd/rules.d/60-persistent-alsa.rules
Yu Watanabe 873be895ed udev: add USB revision in ID_PATH
xHCI host controller may register two (or more?) USB root hubs for USB
2.0 and USB 3.0, and devices under the hubs may have same ID_PATH.
So, to avoid the conflict, let's introduce ID_PATH_WITH_USB_REVISION
that includes the USB revision.

Closes #19406.
2023-05-20 14:27:10 +09:00

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# do not edit this file, it will be overwritten on update
ACTION=="remove", GOTO="persistent_alsa_end"
SUBSYSTEM!="sound", GOTO="persistent_alsa_end"
KERNEL!="controlC[0-9]*", GOTO="persistent_alsa_end"
SUBSYSTEMS=="usb", ENV{ID_MODEL}=="", IMPORT{builtin}="usb_id"
ENV{ID_SERIAL}=="?*", ENV{ID_USB_INTERFACE_NUM}=="?*", SYMLINK+="snd/by-id/$env{ID_BUS}-$env{ID_SERIAL}-$env{ID_USB_INTERFACE_NUM}"
ENV{ID_SERIAL}=="?*", ENV{ID_USB_INTERFACE_NUM}=="", SYMLINK+="snd/by-id/$env{ID_BUS}-$env{ID_SERIAL}"
IMPORT{builtin}="path_id"
ENV{ID_PATH}=="?*", SYMLINK+="snd/by-path/$env{ID_PATH}"
ENV{ID_PATH_WITH_USB_REVISION}=="?*", SYMLINK+="snd/by-path/$env{ID_PATH_WITH_USB_REVISION}"
LABEL="persistent_alsa_end"