How to make rear audio on ALC887 works with AC’97 front panel audio?
1. Open Realtek HD Audio Manager.
The icon is in the notification area (the lower right of the screen).
2. When using AC’97 front panel audio, audio manager will always show there are devices connected to the front panel.
3. Click the yellow icon on the upper right of the window. Check the box to Disable front panel jack detection. Then click OK.