Hi Anders, Yes. It does work! I prefer to modify permission from 0600 to 0660. Thanks. Rocky On Mon, 2005-03-07 at 19:57 +0000, Anders Johansson wrote:

On Monday 07 March 2005 19:51, Rocky Zhang wrote:

...

Hi,

I have a computer running with SuSe 9.1, KDE desktop. And I connected 2 USB audio headsets to my computer. I found that before user log in, the audio devices (such as /dev/dsp*, /dev/snd/*) owner is root:audio, permission is 660; After one user log in, all the audio device files change owner to $USER:audio, permission change to 600, so another users can't have permission to use the USB headset. How can I prevent it ( keep audio device owner always root, and permission is 660, no matter user login or not)?

I know in Fedora Core 2/3 and Mandrake 10.1, it's a configuration file ( /etc/security/console.perms) , which is included in pam RPM, that you can edit to prevent normal session login change audio device owner. I checked my SuSe ( version 9.1), there does have pam-0.77-221 RPM there, but there is no such file (/etc/security/console.perms) included in the RPM. How does SuSe control device owner and permission when normal session log in which are controlled by PAM and console.perms configuration file in other Linux Distribution?

The permissions are controlled by the file /etc/logindevperm where you can control in detail which files get chown()ed, and if you want to stop the chown()ing altogether remove the line "session required pam_devperm.so" from the files /etc/pam.d/xdm and /etc/pam.d/xdm-np

On Monday 07 March 2005 20:15, Sunny wrote:

Hi Rocky, as I can not test it right now, can you share if this solves as well the KDE/arts problem. I.e. does the system sounds for the second user do work after altering these lines.

I was looking for solution for this for a long time.

If you are using standard KDE or gnome programs for playing sounds, then you should probably look at resmgr instead. That's what governs most authorisation in recent suse versions. How is your second user logging in?

On Monday 07 March 2005 20:29, Sunny wrote:

Using "Switch user". I usually lock my desktop with some programs running, and if my wife needs to do something, she just starts a new session without affecting my stuff. But then there was no sound. I had figured out this permission problem (not your solution though), so I have prepared a small script in Autostart to change the permissions back, but it does not made KDE sounds to work. But it helped with XMMS and Skype.

When you use switch user you are logging in on :1, and by default resmgr is only set to give permissions on :0 Have a look at /etc/resmgr.conf. Look for the line allow desktop tty=/dev/tty[1-9]* || tty=tty[1-9]* || tty=:0 and add || tty=:1 at the end and restart resmgr Or perhaps better still (untested) change the last part to tty=:[0-9] that *should* give you resmgr permissions on multiple graphical logins

On Monday 07 March 2005 20:32, Anders Johansson wrote:

Or perhaps better still (untested) change the last part to

tty=:[0-9]

Tested. It works

Hi Sunny, I think it should solve your artsd/sound problem. There maybe another issue: how can you let 2 user launch KDE at same time. 2 options for you: 1) Change audio device lines ( Note: there are bunch of device name related to audio devices, such as audio, sequencer, mixer, snd etc. ) from 0600 to 0660; So after second user login, the user default is in audio group, which should have a R/W permission to access every audio devices; 2) Comment the lines related to audio devices; the audio device (/dev/snd/*) should be always be 0660, owner is root:audio; So the second user should have permission to access the audio device. Thanks. Rocky On Mon, 2005-03-07 at 14:15 -0600, Sunny wrote:

On Mon, 07 Mar 2005 13:04:34 -0700, Rocky Zhang wrote:

...

Hi Anders,

Yes. It does work! I prefer to modify permission from 0600 to 0660.

Thanks.

Rocky

Hi Rocky, as I can not test it right now, can you share if this solves as well the KDE/arts problem. I.e. does the system sounds for the second user do work after altering these lines.

I was looking for solution for this for a long time.

Thanks Sunny