Old problem? 'Failed to set UVC probe control'

[BobLaske]

I've been trying to get a Logitech, Inc. QuickCam Orbit/Sphere AF working with ZM 1.32 (Ubuntu server 18.04) but keep seeing a problem.
Looking around on the net, a lot, finds me a lot of old posts about problems relating to this error but nothing I've read has worked.

A suggestion I read was to install libv4l-0 and add this line in /usr/bin/zmdc.pl
$ENV{LD_PRELOAD} = '/usr/lib/libv4l/v4l1compat.so';

The closest I've gotten to getting it to work is by using
$ sudo rmmod uvcvideo
$ sudo modprobe uvcvideo

Which seems to allow the camera (it's LED at least) to turn on for a few moments rather than a few seconds.
At this point, I don't know what is factual or not so need to post in the forums because some of the things I'm trying seem to be from old posts so it's hard to know what has been updated or not.

Some things I see in dmesg;

[ 7679.801575] input: UVC Camera (046d:0994) as /devices/pci0000:00/0000:00:1d.7/usb1/1-3/1-3:1.0/input/input10
[ 7679.801909] usbcore: registered new interface driver uvcvideo
[ 7679.801913] USB Video Class driver (1.1.1)
[ 7902.622927] usbcore: deregistering interface driver uvcvideo
[ 7906.224698] uvcvideo: Found UVC 1.00 device <unnamed> (046d:0994)
[ 7906.240901] uvcvideo 1-3:1.0: Entity type for entity Extension 4 was not initialized!
[ 7906.240908] uvcvideo 1-3:1.0: Entity type for entity Extension 10 was not initialized!
[ 7906.240913] uvcvideo 1-3:1.0: Entity type for entity Extension 12 was not initialized!
[ 7906.240917] uvcvideo 1-3:1.0: Entity type for entity Extension 8 was not initialized!
[ 7906.240922] uvcvideo 1-3:1.0: Entity type for entity Extension 11 was not initialized!
[ 7906.240927] uvcvideo 1-3:1.0: Entity type for entity Extension 9 was not initialized!
[ 7906.240931] uvcvideo 1-3:1.0: Entity type for entity Processing 2 was not initialized!
[ 7906.240936] uvcvideo 1-3:1.0: Entity type for entity Extension 13 was not initialized!
[ 7906.240940] uvcvideo 1-3:1.0: Entity type for entity Camera 1 was not initialized!
[ 7906.241197] input: UVC Camera (046d:0994) as /devices/pci0000:00/0000:00:1d.7/usb1/1-3/1-3:1.0/input/input11
[ 7906.241426] usbcore: registered new interface driver uvcvideo
[ 7906.241428] USB Video Class driver (1.1.1)
[13868.488102] uvcvideo: Failed to set UVC probe control : -110 (exp. 26).
[13886.788800] usb 1-3: reset high-speed USB device number 5 using ehci-pci
[13895.879921] uvcvideo: Failed to set UVC probe control : -110 (exp. 26).
[13906.756657] usb 1-3: reset high-speed USB device number 5 using ehci-pci

[BobLaske]

No one has seen this problem? I've found it all over the Internet but no answers that seem to work.
There seems to be some sort of memory or other conflict when trying to use more than one USB camera.
I would like to solve this in order to allow multiple USB cams.

Does anyone have anything to offer as input or feedback of their own experience?

[rockedge]

I am running a test system with ZM 1.33.6 that has 3 web cams and 3 net cams. 2 logitechs and a microsoft. I had a 4th webcam which throws the same error as you describe. It is a Logitech Quickcam Deluxe which must conflict with one of the others. Strange is once in a while I can get it going and other times I see the error(s)

UCV cameras work together and once in a while a USB cam will but mostly gives problems

[BobLaske]

Yes, one of my test cameras is also a logitech however, this is happening with microsoft studio cams also.
These are the only two types of hd cameras I have on hand. I could try low red cams and see what happens.