Ubuntu 14.04 : Udev rule to change the alsa number for similar USB sound cards. about alsa

[markc]

I don't have a USB soundcard to test so can you try changing PHYSDEVPATH to just DEVPATH?

my $physdevpath = $ENV{DEVPATH}; #udev put this in our environment

[XavierP56]

Hi Mark,

I'll try the DEVPATH but I don't think it's the problem.
The script receives %k and %b so I can determine the USB port number.

This issue lies more in NAME not doing anything with recents kernels (Ubuntu 14.04).
If I change NAME to SYMLINK+="%c{1}", I see a new device in /dev/snd/...
However, a cat /proc/asound/cards does NOT show me at the new location.

It seems that NAME only works now for ethernet card ! That's a real annoyance for me.
Any ideas ?

Thanks.

[markc]

Like I say, I don't have a USB soundcard to test with but I suspect it's now a lot easier to set this up and a simple shell script, or none at all, may be better than a perl script. All I have is one internal soundcard...

~ udevadm info -q path -n /dev/snd/pcmC0D0c
/devices/pci0000:00/0000:00:1b.0/sound/card0/pcmC0D0c

Does this happen to work for you?

https://github.com/intgr/systemd/blob/master/rules/60-persistent-alsa.rules

[XavierP56]

Hi Mark,

Excellent !
https://github.com/intgr/systemd/blob/master/rules/60-persistent-alsa.rules

seems to do the trick. So far, same order !

Thanks a lot !

2014-06-09 9:28 GMT+02:00 Mark Constable [email protected]:

Like I say, I don't have a USB soundcard to test with but I suspect it's
now a lot easier to set this up and a simple shell script, or none at all,
may be better than a perl script. All I have is one internal soundcard...

~ udevadm info -q path -n /dev/snd/pcmC0D0c
/devices/pci0000:00/0000:00:1b.0/sound/card0/pcmC0D0c

Does this happen to work for you?

https://github.com/intgr/systemd/blob/master/rules/60-persistent-alsa.rules

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