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Old 09-03-2009, 01:48 PM   #1
Registered: Apr 2009
Distribution: Slackware 13.0
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Config file on user login, running command as root?

I'm trying to get snd-usb-audio to work for my MIDI USB interface at startup. It works, but every time I login I have to run a terminal as root and type "modprobe snd-usb-audio". The reason for this is that I blacklisted it in /etc/modprobe.d/blacklist, since it was breaking ALSA every time I turned on my laptop.

So, is there any way to get this to work, making the audio device default instead of "USB MIDI Interface", or to simply automatically run "modprobe snd-usb-audio" as root every time I log in?

Thanks in advance.
Old 09-04-2009, 09:25 AM   #2
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If you login as root every time you could do this simply by adding the commands to your .bashrc or .bash_profile (assuming bash, .profile if ksh or .cshrce is csh).

If you login as a regular user you could do the same but would want to configure sudo to allow your user account to run the requisite commands as root. Type "man sudo" then "man sudoers" for more details of how to setup sudo. (Be sure to use visudo to modify sudoers when you get that far.)

By default sudo would require you to enter your password a second time when it was invoked but you could avoid that but using the RUNAS specification in the sudoers file.
Old 09-04-2009, 04:11 PM   #3
Registered: Apr 2009
Distribution: Slackware 13.0
Posts: 48

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Thanks, it works flawlessly.

.bashrc isn't loaded with X, I had to add it to Autostarted Applications.

Here's my /etc/sudoers, I made it as secure as possible:
# /etc/sudoers
# This file MUST be edited with the 'visudo' command as root.
# See the man page for details on how to write a sudoers file.

Defaults	env_reset

# Host alias specification

Host_Alias	LOCALHOST = localhost #not sure if this is useful...

# User alias specification

User_Alias	SNDUSBUSERS = me

# Cmnd alias specification

# User privilege specification
root	ALL=(ALL) ALL
SNDUSBUSERS 	LOCALHOST = NOPASSWD: /sbin/modprobe snd-usb-audio


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