[linux-uvc-devel] gspca_z3cxx: Failed to query (GET_CUR) UVC control 11 on unit 2

[Xavier B. <xav...@fr...>]

Hi,

I have a webcam identified by:
Bus 001 Device 005: ID 046d:0825 Logitech, Inc. Webcam C270

My kernel (Debian sid 5.6.0-1-amd64) loads the gspca_zc3xx driver:

[jeu. mai 14 01:46:40 2020] usb 5-3.3: new full-speed USB device number 13 using xhci_hcd
[jeu. mai 14 01:46:40 2020] usb 5-3.3: New USB device found, idVendor=046d, idProduct=08d7, bcdDevice= 1.00
[jeu. mai 14 01:46:40 2020] usb 5-3.3: New USB device strings: Mfr=0, Product=0, SerialNumber=0
[jeu. mai 14 01:46:40 2020] gspca_main: gspca_zc3xx-2.14.0 probing 046d:08d7
[jeu. mai 14 01:46:41 2020] input: gspca_zc3xx as /devices/pci0000:00/0000:00:1c.0/0000:01:00.0/0000:02:01.0/0000:04:00.0/0000:05:01.0/0000:07:00.0/usb5/5-3/5-3.3/input/input52

but when I try to open it with "cheese" (the GNOME webcam app) it's not
selectable, and I see these errors:

[jeu. mai 14 01:46:51 2020] uvcvideo: Failed to query (GET_CUR) UVC control 11 on unit 2: -110 (exp. 1).
[jeu. mai 14 01:46:51 2020] uvcvideo: Failed to query (GET_CUR) UVC control 11 on unit 2: -32 (exp. 1).

Does anyone know what goes wrong, and what can I do to help/debug ?

Cheers,

	Xav