Dear Linux folks,
On the Dell Latitude E7250 with Linux 4.20 (and before), Linux logs the
messages below.
> [ 7.485523] calling uvc_init+0x0/0x1000 [uvcvideo] @ 327
> [ 7.489034] uvcvideo: Found UVC 1.00 device Integrated_Webcam_HD (1bcf:28ae)
> [ 7.490766] uvcvideo: Failed to query (GET_INFO) UVC control 3 on unit 1: -32 (exp. 1).
> [ 7.504807] Bluetooth: hci0: Intel firmware patch completed and activated
> [ 7.512637] uvcvideo 3-1.6:1.0: Entity type for entity Extension 4 was not initialized!
> [ 7.512641] uvcvideo 3-1.6:1.0: Entity type for entity Extension 3 was not initialized!
> [ 7.512644] uvcvideo 3-1.6:1.0: Entity type for entity Processing 2 was not initialized!
> [ 7.512647] uvcvideo 3-1.6:1.0: Entity type for entity Camera 1 was not initialized!
> [ 7.512781] input: Integrated_Webcam_HD: Integrate as /devices/pci0000:00/0000:00:1d.0/usb3/3-1/3-1.6/3-1.6:1.0/input/input20
> [ 7.512885] probe of 3-1.6:1.0 returned 1 after 27344 usecs
> [ 7.512914] usbcore: registered new interface driver uvcvideo
> [ 7.512915] USB Video Class driver (1.1.1)
> [ 7.512928] initcall uvc_init+0x0/0x1000 [uvcvideo] returned 0 after 26750 usecs
[…]
Suspend the system, Linux logs the similar messages.
> [ 875.062715] uvcvideo: Failed to query (GET_CUR) UVC control 3 on unit 1: -32 (exp. 1).
> [ 875.065380] uvcvideo: Failed to query (GET_CUR) UVC control 3 on unit 1: -32 (exp. 1).
> [ 888.050306] uvcvideo: Failed to query (GET_CUR) UVC control 3 on unit 1: -32 (exp. 1).
> [ 888.053142] uvcvideo: Failed to query (GET_CUR) UVC control 3 on unit 1: -32 (exp. 1).
Please find all Linux messages attached additionally to the output of
`sudo lsusb -v -d 1bcf:28ae`.
Kind regards,
Paul