Linux

Hello,
whenever I plugin my webcam, I want to use its microphone instead of the one integrated in my laptop.
I therefore created a udev rule:

Code:

SUBSYSTEM=="usb", ATTR{idVendor}=="046d", ATTR{idProduct}=="0807", RUN+="/usr/local/bin/webcammic"

This rule works, I've tested it with a testscript (the testscript works when I plugin my webcam).

For changing the microphone I use the following script.

Code:

#!/bin/bash
echo "set-default-source alsa_input.usb-046d_0807_83CCA370-02-U0x46d0x807.analog-mono" | pacmd

This works as well if I execute it in my comand line like this:

Code:

jo@jo-P53E:~$ sh /usr/local/bin/webcammic
Welcome to PulseAudio! Use "help" for usage information.

However udev seems to execute as root and therefore the script in combination with the udev rule doesn't work (→ nothing happens when I plug in my webcam).
I therefore changed the script to:

Code:

#!/bin/bash
su jo -c "echo \"set-default-source alsa_input.usb-046d_0807_83CCA370-02-U0x46d0x807.analog-mono\" | pacmd"

But if I plugin the webcam, nothing happens. If I execute the script in the command line, I get the following error:

Code:

jo@jo-P53E:~$ sh /usr/local/bin/webcammic
Passwort: 
Welcome to PulseAudio! Use "help" for usage information.
>>> >>> Sessions still open, not unmounting
jo@jo-P53E:~$

Does anybody know what's wrong with my script or has any suggestions what to try else?
Thanks in advance!


Just for Information: I'm using Ubuntu 12.04