I verified below check items on DELL Latitude 7490:
- Verifying that plugging/unplugging headphones does the correct thing: Pass
When plugging a headphone, the Unknow Audio Device dialog will pop up. And, the headphone works fine. When unplugging the headphone, the device will be remove from the Settings list.
When plugging a headset, Unknow Audio Device dialog will pop up. And, Both input and output function works fine. When unplugging the headset, the device will be remove from the Settings list.
When plugging a microphone, Unknow Audio Device dialog will pop up. And, the microphone works fine. When unplugging the microphone, the device will be remove from the Settings list.
- Verifying that manually selecting a headphone actually switches the mic: Pass
When plugging a headphone and switching the input device manually, only Internal Microphone works. The "Headset Microphone" and "Microphone" do not work.
When plugging a headset and switching the input device manually, the "Internal Microphone" and "Headset Microphone" work. The "Microphone" does not work.
When plugging a microphone and switching the input device manually, the "Internal Microphone" and "Microphone" work. The "Headset Microphone" does not work.
- Checking that output sound works too: Pass
When plugging a headphone and switching the output device manually, both the "Speakers" and "Headphones" work.
When plugging a headset and switching the output device manually, both the "Speakers" and "Headphones" work.
When plugging a microphone and switching the output device manually, only the "Speakers" works. The "Headphones" does not work.
@Chris,
I verified below check items on DELL Latitude 7490:
- Verifying that plugging/unplugging headphones does the correct thing: Pass
When plugging a headphone, the Unknow Audio Device dialog will pop up. And, the headphone works fine. When unplugging the headphone, the device will be remove from the Settings list.
When plugging a headset, Unknow Audio Device dialog will pop up. And, Both input and output function works fine. When unplugging the headset, the device will be remove from the Settings list.
When plugging a microphone, Unknow Audio Device dialog will pop up. And, the microphone works fine. When unplugging the microphone, the device will be remove from the Settings list.
- Verifying that manually selecting a headphone actually switches the mic: Pass
When plugging a headphone and switching the input device manually, only Internal Microphone works. The "Headset Microphone" and "Microphone" do not work.
When plugging a headset and switching the input device manually, the "Internal Microphone" and "Headset Microphone" work. The "Microphone" does not work.
When plugging a microphone and switching the input device manually, the "Internal Microphone" and "Microphone" work. The "Headset Microphone" does not work.
- Checking that output sound works too: Pass
When plugging a headphone and switching the output device manually, both the "Speakers" and "Headphones" work.
When plugging a headset and switching the output device manually, both the "Speakers" and "Headphones" work.
When plugging a microphone and switching the output device manually, only the "Speakers" works. The "Headphones" does not work.