Dear all, I tried to reactivate my webcam in a ASUS B50A laptop, which is officially supported (according to https://www.ideasonboard.org/uvc/) and was known to work. But with my attempts to use it with guvcview it just ended in syslog entries like "kernel: uvcvideo: Failed to query (GET_INFO) UVC control 1 on unit 3: -32 (exp. 1)." It looks like the uvcvideo module is loaded, but the device file is not created, though it is not there. Is there anything we can do to make this camera work again? Any help is appreciated. a@B50:~$ lsusb Bus 002 Device 003: ID 04f2:b071 Chicony Electronics Co., Ltd 2.0M UVC Webcam / CNF7129 guvcview - Output: a@B50:~$ guvcview GUVCVIEW: version 2.0.6 GUVCVIEW: couldn't open /home/a/.config/guvcview2/video0 for read: Datei oder Verzeichnis nicht gefunden V4L2_CORE: ERROR opening V4L interface: Datei oder Verzeichnis nicht gefunden GUVCVIEW (1): Guvcview error no video device found (guvcview:4003): Gtk-WARNING **: 14:16:29.935: Theme parsing error: <data>:1:17: not a number ... UVCvideo current module configuration: a@B50:~$ cat /etc/modprobe.d/uvcvideo.conf options uvcvideo quirks=0x200 a@B50:~$ syslog excerpt with trace=0xffff: [ 39.510590] uvcvideo: Found UVC 1.00 device CNF7129 (04f2:b071) [ 39.510910] uvcvideo: Failed to query (GET_INFO) UVC control 2 on unit 3: -32 (exp. 1). [ 39.512016] uvcvideo: Failed to query (GET_INFO) UVC control 3 on unit 3: -32 (exp. 1). [ 39.513139] uvcvideo: Failed to query (GET_INFO) UVC control 6 on unit 3: -32 (exp. 1). [ 39.514265] uvcvideo: Failed to query (GET_INFO) UVC control 7 on unit 3: -32 (exp. 1). [ 39.515262] uvcvideo: Failed to query (GET_INFO) UVC control 8 on unit 3: -32 (exp. 1). [ 39.516390] uvcvideo: Failed to query (GET_INFO) UVC control 9 on unit 3: -32 (exp. 1). [ 39.517513] uvcvideo: Failed to query (GET_INFO) UVC control 10 on unit 3: -32 (exp. 1). [ 39.518639] uvcvideo: Failed to query (GET_INFO) UVC control 1 on unit 3: -32 (exp. 1). [ 39.519764] uvcvideo: Failed to query (GET_INFO) UVC control 4 on unit 3: -32 (exp. 1). [ 39.520887] uvcvideo: Failed to query (GET_INFO) UVC control 5 on unit 3: -32 (exp. 1). [ 39.522015] uvcvideo: Failed to query (GET_INFO) UVC control 11 on unit 3: -32 (exp. 1). [ 39.523141] uvcvideo: Failed to query (GET_INFO) UVC control 13 on unit 3: -32 (exp. 1). [ 39.524637] uvcvideo: UVC non compliance - GET_DEF(PROBE) not supported. Enabling workaround. [ 39.525273] uvcvideo: Failed to query (129) UVC probe control : -32 (exp. 26). [ 39.525276] uvcvideo: Failed to initialize the device (-5). [ 39.525368] usbcore: registered new interface driver uvcvideo Thanks, Micha
