On 2014-02-03, [email protected] <[email protected]> wrote:
> I'm interested to make a persistent name for a sound device.
> The output of "udevadm info -a -p $(udevadm info -q path -n /dev/... )"
> follows.
> What exactly is meant by the last sentence of the introductory paragraph?
> Must the first match occur in the first stanza of the info? Does "one single
> parent device" allow the direct parent only? Can the attributes belong to
> the
> grandparent or great-grandparent?
>
> This is one rule I've tried.
> SUBSYSTEM=="sound", ATTRS{idVendor}=="0d8c", ATTRS{idProduct}=="0008",
> SYMLINK+="USBspeakers"
> None of my rules have yielded a SYMLINK.
>
> Thanks for any ideas, ... Peter E.
As an alternative to udev, you may already have a persistent name. When
I plug in a Logitech C170 webcam, /proc/asound/cards shows:
0 [SB ]: HDA-Intel - HDA ATI SB
HDA ATI SB at 0xfbdf4000 irq 16
1 [HDMI ]: HDA-Intel - HDA ATI HDMI
HDA ATI HDMI at 0xfbeec000 irq 44
2 [C170 ]: USB-Audio - Webcam C170
Webcam C170 at usb-0000:00:13.2-4, high speed
Then I can record with the webcam microphone by:
arecord -f S16_LE -D hw:C170 filename
So take a look at /proc/asound/cards .
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