I have a new HP Pavilion Desktop TP01 PC with i7 and Windows 1909 newly installed.
Each time I attempt to use the line-in port with Audacity, the port the port becomes inoperative…
It no longer indicates/knows that the phone jack is inserted. (As shown on the Sound window Recording tab.)
After hours and hours of troubleshooting, I notified HP and they ultimately installed a new motherboard. The problem did not go away.
Upon the return of the HP Pavilion, I checked the port. The line-in port displayed as plugged in.
Using mmsys.cpl for the Sound display, and activating Audacity the Line in port switched to “not plugged in.” The port again closed!!! Permanently!!
The only way to reactivate the line-in port is to DEINSTALL the Realtek Audio device and reboot to have it reinstall Realtek driver/app, Then its available.
If I again run the latest Audacity (2.4.1) I can watch the port shut down.
I have spent hours localizing the problem to this situation, it is repeatable.
Simply, when you run Audacity, it removes line-input. This can be also observed by opening Device Manager to “Audio inputs and outputs” activating Audacity, and watching the Line-input entry disappear.
The Realtek must be uninstalled, rebooted and will again Line-in will appear, until Audacity is run.
Somehow, Realtek Audio with the latest driver (5/20/2020) and Audacity are fighting. There must be some Realtech(?) code that being overwritten by Audacity. Am I right?
Does anyone know of a fix for this?
BTW, I have another nine year old machine with Win 10 1909 and Audacity 2.4.1. The only difference is that it does not have Audio Loopback hardware. I have no problem recording with Line-in!!