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Old 04-02-2002, 12:43 PM   #1
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Registered: Mar 2002
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Problems with sound

I have linux mandrake 8.1 on my computer and I'm trying to put the sound through a stereo but the sound won't even work if i plug headphones into the back, do i have to switch something in the settings somewhere or is it just my speaker plug that's the problem

Old 04-03-2002, 08:41 AM   #2
Registered: Mar 2002
Location: Houston
Distribution: FC3, Manrake 10.x, various others at times
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Post check permissions

I'm not running Mandrake, but tried Red Hat 7.2 and then installed SuSE 7..3 and had sound problems with both. I'd get a message as KDE was starting about not being able to start the sound server or something like that. I think I got a similar message with gnome.

Anyway, if I went to /dev and did ll mi* and ll ds* all the mixer and dsp devices were owned by root and were in group root. I don't know which was the offending party, but I changed the whole lot to group audio: chgrp audio mi* and did the same for ds*, and then made sure that all users I had added to the system were members of the audio group. I also made sure the permissions allowed write access: chmod 660 mi* and chmod 660 ds*. When you send sound to the device you have to write to it, so you need to be in a group with write permission. The zero after the two sixes is so that anyone not specifically allowed cannot write to the device, as I understand it is a potential security issue.

All this has to be done as root, so you may have to su - first.

I think that this permissions issue is common with sound, so I'd check that first. If it's not the issue then maybe you have an installation problem with your sound card.


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