S2718D, Logitech C920 HD pro webcam not recognized

Question

When plugged in directly to XPS15 9560, works just fine. However, when XPS 15 9560 is paired with S2718D monitor (via USB Type-C cable), and cam plugged into the standard USB port on the monitor base, nothing. I am successful in using the cam with a different laptop connected to the S2718D in the same fashion. I reviewed all the available posts addressing similar question without an answer. Appreciate help.

XPS_Man · Answer

Do those USB ports work for anything else ? Like a USB mouse/ thumb drive ?

VRinSLC · Answer

USB ports work just fine (SSD). As mentioned, USB port recognizes/powers the webcam if another laptop is connected to the monitor via USB-C, but not when Dell XPS 15 9560 is connected.

XPS_Man · Answer

Lets assume you are plugging the Cam to Monitor

Any notification (sound) when webcam is unplugged and re-plugged ?

Any unknown (other) devices in Device manager, or Yellow exclamation marks ?

Any changes in Device and Printer (control panel) ?

VRinSLC · Answer

but if I plug the cam directly to XPS15 9560, works well. Only not if it connects via Dell S2718D monitor.

XPS_Man · Answer

Strange !!!!

So monitor and cable are fine as working with another computer

XPS 9560 is fine as same USB ports working fine for other USB devices.

Only thing I can conclude it to XPS 9560 not recognizing the drivers for that webcam. >>

Any notification (sound) when webcam is unplugged and re-plugged

Any unknown (other) devices in Device manager, or Yellow exclamation marks

Any changes in Device and Printer (control panel)

VRinSLC · Answer

No sound. No unknown devices in the Device manager - cam microphone gets recognized, but not the cam. Cam does show up in 'Devices and Printers'

XPS_Man · Answer

cam microphone gets recognized : Well that makes things more interesting  Cam does show up in 'Devices and Printers':  Well than where is the problem ? In which apps are you testing the camera ??  Zoom may be ??  Windows doesn't have an option of Default Camera,  So are you manual changing the camera

VRinSLC · Answer

Camera is not recognized by Zoom, MS Teams, or the Windows Camera App. If I connect it to the other laptop as described, I am given an option to select it manually and can change between the Logitech and integrated cam.

XPS_Man · Answer

I am about to give up can you snapshot the Device manager with Logitech cam showing in it ? some thing is missing.

VRinSLC · Answer

after many plug ins and outs, camera is now recognized. mystery remains. I did not update anything, nor the cam has any drivers to begin with. perplexing.

XPS_Man · Answer

I checked Logitech site and the Cam is pretty much a generic device and doesn't have any Drivers.

Try a new type C cable may be ??

Reinstall Chipset and Intel management drivers from Support Site (both responsible for USB C function)

Last option would be to reinstall OS

XPS

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