I have an Ipevo usb camera and since the last kernel update the camera doesn't work...
Product: P2V Point 2 View USB Document Camera
OS: Linux version 5.3.0-40-generic (buildd@lcy01-amd64-024) (gcc version 7.4.0 (Ubuntu 7.4.0-1ubuntu1~18.04.1)) #32~18.04.1-Ubuntu
usb camera well detected but uvc kernel driver not loading. There is no /dev/video0 file created. here is the result of "dmesg | tail" command :
[ 3390.529798] usb 1-1.4: Manufacturer: IPEVO Inc. [ 3390.531093] hid-generic 0003:1778:0214.0006: hiddev0,hidraw2: USB HID v1.10 Device [IPEVO Inc. IPEVO Point 2 View] on usb-0000:00:1a.0-1.4/input0 [ 3390.533871] uvcvideo: Found UVC 1.00 device IPEVO Point 2 View (1778:0214) [ 3390.533979] uvcvideo: Failed to query (GET_INFO) UVC control 2 on unit 1: -32 (exp. 1). [ 3390.534597] uvcvideo: Failed to query (GET_INFO) UVC control 9 on unit 1: -32 (exp. 1). [ 3390.536351] uvcvideo: No streaming interface found for terminal 2. [ 3390.536357] uvcvideo 1-1.4:1.1: Entity type for entity Extension 4 was not initialized! [ 3390.536362] uvcvideo 1-1.4:1.1: Entity type for entity Processing 3 was not initialized! [ 3390.536365] uvcvideo 1-1.4:1.1: Entity type for entity Camera 1 was not initialized! [ 3390.536496] input: IPEVO Point 2 View: IPEVO Point as /devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.4/1-1.4:1.1/input/input21
there is the same problem on Suse, they resolve the issue with kernel tunning : https://bugzilla.suse.com/show_bug.cgi?id=1159811
thanks for helping