2 problems: sound and permission denied to be root!

guest · Guest

1. I installed Gentoo with KDE. When I'm root sound is working, but not as normal user. When I log as user a window appears saying error while initialisaion sound driver. Device /dev/dsp can't be opened....

So, I tried chmod 644 /dev/dsp but did not help.

2. I have another problem. When I'm a normal user and I open up a terminal to be "root", it failed. I get this message:

su
password: ******

su: Permission denied
Sorry.

Thanks for your help.

klieber · Posted: Sun Apr 21, 2002 12:12 am Post subject:

1. add your user account to the "audio" group

2. add your user account to the "wheel" group
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Guest · Posted: Sun Apr 21, 2002 5:49 am Post subject:

Just wanted to say I was having the same problem too, but this fixed it. Thanks.

febisfebi · Posted: Sun Apr 21, 2002 9:31 am Post subject:

i had the same problem, and i fixed it by chmod 666 /dev/dsp
i dont think this is the best way to do it, what permissions should it be set to?

Princess Firefly · Guest

I've been killing myself over devfs for a few days and I finally got my sound working a few hours ago.

Everytime you boot devfs overwrites the /dev directory so any permissions you set are going to be overwritten.

In the installation guide it said to have the following in your /etc/devfsd.conf file (under the ALSA section):

REGISTER sound/.* PERMISSIONS root.audio 660
REGISTER snd/.* PERMISSIONS root.audio 660

I guess this is suppossed to make it so people belonging to the "audio" group can use the sound stuff. Great idea, but it didn't work for me at all. dsp and mixer and all the sound devices were NOT 660 after boot. I almost uninstalled gentoo after about 10 hours of trying to figure this out and move to something not so dependent on devfs but I couldn't give up the speedups of gentoo :wink:

Here's what I did that finally got it to work, someone out there will probably say I'm doing something "un-devfs" like but I don't care, it works. I commented out the two lines above in my /etc/devfsd.conf file. so the ALSA section now looks like this:

..

# ALSA/OSS stuff
# Comment/change these if you want to change the permissions on
# the audio devices
LOOKUP snd MODLOAD ACTION snd
LOOKUP dsp MODLOAD
LOOKUP mixer MODLOAD
LOOKUP midi MODLOAD
#REGISTER sound/.* PERMISSIONS root.audio 660
#REGISTER snd/.* PERMISSIONS root.audio 660

...

*shrug* it finally works. I don't know why exactly but I'm glad that it does. Also, make sure if you're using gnome that you get esd working (emerge esound) and that you have ALSA working (sound compiled ONLY as modules in the kernel, emerge alsa-utils, setup conf files as described in desktop configuration guide).

Hope this helps some poor soul out there struggling with fricken devfs.

The Princess

ProGuy · n00b Joined: 14 Apr 2002 Posts: 17 Location: Denmark

I have the exact same problem with devfs not setting permissions as it should. I mainly have this problem for /dev/nvidia* and /dev/sound/*.

I'll have to try to remove those permissions line from my /etc/devfsd.conf, but I am really wondering why this is necesarry.

Is this a bug in the devfs daemon (it surely needs to be fixed then)?
Has anyone looked into this? (I can't seem to find any information about this anywhere).
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//ProGuy