SDB:Sound Card Makes a Noise After KDE Starts
After KDE starts, your sound card begins making a noise, and the sound output is distorted.
The IEC958 output ports of your sound chips are activated by kmix or KDE and cause this noise.
First, disable the KDE-specific mixer support and use only the sound mixer of the ALSA sound system (e.g., KAmix). To do this, proceed as follows:
- Make sure that no mixer application is loaded. The tray next to the clock should not contain any loudspeaker icon. If it does, right-click it and select the entry "Quit" from the context menu.
- If the query [Should KAMix start automatically when you log in?] is displayed when closing the mixer, confirm with "Yes" and skip step 13 and step 14 below.
- In the YaST Control Center, go to:
- Install and Remove Software
- Search for the keyword "kdemultimedia".
- Right-click the package "kdemultimedia3-mixer" and select the entry "Delete" from the context menu.
- Click the button "Accept" at the bottom right.
- Close the YaST Control Center.
- Open a console (e.g., by pressing [Alt]+[F2] and entering the command "konsole).
- In the console, enter the command "su -".
- You will be prompted to enter the administrator (root) password. Your input will not be displayed.
- Enter the following commands in the indicated order:
- rcalsasound stop
- rm /etc/asound.state
- rcalsasound start
- alsactl store
- Log out from the root identity in the console by pressing the key combination [Ctrl]+[D].
- Enter the command "kamix & ".
- Confirm the message [KDEInit could not launch "CheckHardware".].
- Close the console by pressing the key combination [Ctrl]+[D].