Ask the LINUX voice driver questions

Source: Internet
Author: User
For more information about LINUX sound driver-Linux general technology-Linux technology and application, see the following. The REDHAT sound driver is not installed successfully. According to the tutorial, three files of ALSA are also downloaded, which have been installed but appear when the volume is adjusted:
The volume cannot be properly controlled.

Unable to open the audio device '/dev/mixer '.
Make sure you have the permission to open '/dev/mixer '.
You have added sound card support when compiling the kernel.

Click exit to exit the volume control.
Please kindly advise me ,!!!!!
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