ho installato una webcam con microfono integrato NIYPS.
La cam, all'avvio, funziona correttamente.
Il problema nasce se , da un qualsiasi sw video, si spegne e riaccende la camera. alla riaccensione pò non riaccendersi più.
Unica soluzione è cambiare porta usb.
ho cercato in ogni dove, e pare che il problema non sia isolato. Ma non ho trovato nessuna soluzione funzionante.
Il problema è pesantissimo, perchè impossibilita la didattica a distanza dei miei figli,
da dmesg emergono problemi in UVCVIDEO
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[ 1.222077] usb 2-9: config 1 interface 0 altsetting 0 endpoint 0x83 has an invalid bInterval 32, changing to 9
[ 1.222460] usb 2-9: New USB device found, idVendor=1b3f, idProduct=2247, bcdDevice= 1.00
[ 1.222461] usb 2-9: New USB device strings: Mfr=1, Product=2, SerialNumber=5
[ 1.222462] usb 2-9: Product: GENERAL WEBCAM
[ 1.222463] usb 2-9: Manufacturer: GENERAL
[ 1.222463] usb 2-9: SerialNumber: JH0319_20200710_v012
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[ 3.866025] uvcvideo: Found UVC 1.00 device GENERAL WEBCAM (1b3f:2247)
[ 3.866068] uvcvideo: Failed to query (GET_INFO) UVC control 2 on unit 1: -32 (exp. 1).
[ 3.866909] uvcvideo: UVC non compliance - GET_DEF(PROBE) not supported. Enabling workaround.
[ 3.867119] input: GENERAL WEBCAM: GENERAL WEBCAM as /devices/pci0000:00/0000:00:14.0/usb2/2-9/2-9:1.0/input/input8
[ 3.867165] usbcore: registered new interface driver uvcvideo
[ 3.867165] USB Video Class driver (1.1.1)
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[ 4.234083] uvcvideo: Failed to query (GET_DEF) UVC control 2 on unit 1: -32 (exp. 1).
[ 4.276488] uvcvideo: Failed to query (GET_DEF) UVC control 2 on unit 1: -32 (exp. 1).
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alessio@alessio-All-Series:~$ lsusb
Bus 001 Device 002: ID 8087:8001 Intel Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 005 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 004 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 002 Device 003: ID 1b3f:2247 Generalplus Technology Inc. GENERAL WEBCAM
Bus 002 Device 002: ID 248a:8367 Maxxter Wireless Receiver
Bus 002 Device 004: ID 058f:6254 Alcor Micro Corp. USB Hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
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alessio@alessio-All-Series:~$ sudo lsusb -t
/: Bus 05.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/2p, 10000M
/: Bus 04.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/2p, 480M
/: Bus 03.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/6p, 5000M
/: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/14p, 480M
|__ Port 6: Dev 2, If 0, Class=Human Interface Device, Driver=usbhid, 12M
|__ Port 6: Dev 2, If 1, Class=Human Interface Device, Driver=usbhid, 12M
|__ Port 9: Dev 3, If 2, Class=Audio, Driver=snd-usb-audio, 480M
|__ Port 9: Dev 3, If 0, Class=Video, Driver=uvcvideo, 480M
|__ Port 9: Dev 3, If 3, Class=Audio, Driver=snd-usb-audio, 480M
|__ Port 9: Dev 3, If 1, Class=Video, Driver=uvcvideo, 480M
|__ Port 10: Dev 4, If 0, Class=Hub, Driver=hub/4p, 480M
/: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/2p, 480M
|__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/8p, 480M
ho seguito guide in ogni dove, ma il problema non si è risolto
spero possiate aiutarmi
grazie
ciao Alessio