Fortsetzung der Diskussion von USB Webcam in browser doesn't work anymore:
Thanks for your answers @Aragorn,
It’s brave (a chromium-based one) but I do have the same issues on FireFox and Chrome.
The permissions are set to allow but as I noticed regarding to the webcam-checker-page: https://webcamtests.com/ , it found the cam, but it’s not accessible
And after clicking on the button, test my webcam:
Well, have you tried that? Only one application can access your webcam at the time, so if you’re trying to use it with another application, then your test will fail.
As far as I know, I don’t have any other application started, that is connected with the webcam.
But if I would start zoom now, it would immediately found the cam and it would work.
Only in Browsers the cam didn’t work
Are you using firejail or anything of that sort?
Are your browsers from the repository or are they FlatPaks/Snaps/AppImages?
Then the only thing I can still think of would be a browser add-on that prevents your browser from making contact with your camera. 
That is impossible, as I don’t generally use firefox, and don’t have any plugins there installed.
And it happend on both browsers
Are you sure nothing is accessing your webcam when you are trying this? Something like kamoso for instance?
The error message is clearly saying that your camera is already in use by something. 
I don’t think there isn’t any other process on that cam. kamoso is not installed.
I mean… would it work otherwise to start zoom and have the webcam working right after start of zoom?
But is there a way to test it the video-device is used anywhere (e.g. with a cli-command) ?
Wait, I’ve tested the cam now on discord, and there I also don’t have a screen (it shows the webcam device, but got no screen if used)
Please post the output of:
lsof | grep --ignore-case /dev/vid
…and:
v4l2-ctl --list-devices
Please.
lsof | grep --ignore-case /dev/vid
Discord 2414 suther 144u CHR 81,0 0t0 1602 /dev/video0
Discord 2414 2427 ThreadPoo suther 144u CHR 81,0 0t0 1602 /dev/video0
Discord 2414 2429 Chrome_Ch suther 144u CHR 81,0 0t0 1602 /dev/video0
Discord 2414 2431 GpuMemory suther 144u CHR 81,0 0t0 1602 /dev/video0
Discord 2414 2434 Composito suther 144u CHR 81,0 0t0 1602 /dev/video0
Discord 2414 2435 ThreadPoo suther 144u CHR 81,0 0t0 1602 /dev/video0
Discord 2414 2436 Composito suther 144u CHR 81,0 0t0 1602 /dev/video0
Discord 2414 2437 Composito suther 144u CHR 81,0 0t0 1602 /dev/video0
Discord 2414 2438 Composito suther 144u CHR 81,0 0t0 1602 /dev/video0
Discord 2414 2439 Composito suther 144u CHR 81,0 0t0 1602 /dev/video0
Discord 2414 2440 Composito suther 144u CHR 81,0 0t0 1602 /dev/video0
Discord 2414 2442 Discord suther 144u CHR 81,0 0t0 1602 /dev/video0
Discord 2414 2478 Discord suther 144u CHR 81,0 0t0 1602 /dev/video0
Discord 2414 2479 Discord suther 144u CHR 81,0 0t0 1602 /dev/video0
Discord 2414 2480 Discord suther 144u CHR 81,0 0t0 1602 /dev/video0
Discord 2414 2481 Discord suther 144u CHR 81,0 0t0 1602 /dev/video0
Discord 2414 2504 Voice suther 144u CHR 81,0 0t0 1602 /dev/video0
Discord 2414 2505 VideoDevi suther 144u CHR 81,0 0t0 1602 /dev/video0
Discord 2414 2506 SaveClip suther 144u CHR 81,0 0t0 1602 /dev/video0
Discord 2414 2507 Voice suther 144u CHR 81,0 0t0 1602 /dev/video0
Discord 2414 2508 Voice suther 144u CHR 81,0 0t0 1602 /dev/video0
Discord 2414 2509 aecdump suther 144u CHR 81,0 0t0 1602 /dev/video0
Discord 2414 2510 AudioDevi suther 144u CHR 81,0 0t0 1602 /dev/video0
Discord 2414 2511 AudioDevi suther 144u CHR 81,0 0t0 1602 /dev/video0
Discord 2414 2513 threaded- suther 144u CHR 81,0 0t0 1602 /dev/video0
Discord 2414 2514 webrtc_au suther 144u CHR 81,0 0t0 1602 /dev/video0
Discord 2414 2515 webrtc_au suther 144u CHR 81,0 0t0 1602 /dev/video0
Discord 2414 2516 threaded- suther 144u CHR 81,0 0t0 1602 /dev/video0
Discord 2414 2517 webrtc_au suther 144u CHR 81,0 0t0 1602 /dev/video0
Discord 2414 2518 webrtc_au suther 144u CHR 81,0 0t0 1602 /dev/video0
Discord 2414 2560 Utils suther 144u CHR 81,0 0t0 1602 /dev/video0
Discord 2414 2655 GameUtils suther 144u CHR 81,0 0t0 1602 /dev/video0
Discord 2414 2699 Dedicated suther 144u CHR 81,0 0t0 1602 /dev/video0
Discord 2414 2717 ThreadPoo suther 144u CHR 81,0 0t0 1602 /dev/video0
Discord 2414 2725 AudioOutp suther 144u CHR 81,0 0t0 1602 /dev/video0
Discord 2414 2766 Media suther 144u CHR 81,0 0t0 1602 /dev/video0
Discord 2414 2902 Dedicated suther 144u CHR 81,0 0t0 1602 /dev/video0
Discord 2414 5025 Dedicated suther 144u CHR 81,0 0t0 1602 /dev/video0
Discord 2414 8204 Dedicated suther 144u CHR 81,0 0t0 1602 /dev/video0
Discord 2414 8205 Dedicated suther 144u CHR 81,0 0t0 1602 /dev/video0
Discord 2414 8206 Dedicated suther 144u CHR 81,0 0t0 1602 /dev/video0
Discord 2414 8207 Dedicated suther 144u CHR 81,0 0t0 1602 /dev/video0
Discord 2414 32225 ThreadPoo suther 144u CHR 81,0 0t0 1602 /dev/video0
Discord 2414 32508 ThreadPoo suther 144u CHR 81,0 0t0 1602 /dev/video0
Discord 2414 32509 ThreadPoo suther 144u CHR 81,0 0t0 1602 /dev/video0
Discord 2414 32784 ThreadPoo suther 144u CHR 81,0 0t0 1602 /dev/video0
Discord 2414 32785 ThreadPoo suther 144u CHR 81,0 0t0 1602 /dev/video0
Discord 2414 32786 ThreadPoo suther 144u CHR 81,0 0t0 1602 /dev/video0
Discord 2414 32787 ThreadPoo suther 144u CHR 81,0 0t0 1602 /dev/video0
Discord 2414 32810 TaskQueue suther 144u CHR 81,0 0t0 1602 /dev/video0
Discord 2414 32811 rtp_send_ suther 144u CHR 81,0 0t0 1602 /dev/video0
Discord 2414 32918 AudioEnco suther 144u CHR 81,0 0t0 1602 /dev/video0
v4l2-ctl --list-devices
Logitech BRIO (usb-0000:00:14.0-4):
/dev/video0
/dev/video1
/dev/video2
/dev/video3
/dev/media0
Completely closed discord now and tried again… so lsof | grep --ignore-case /dev/vid return nothing, but same as before… means the webcam didn’t work at the webpage.
This quite clearly shows that discord has control of what I presume to be your webcam. I’m guessing you’re not trying to use it in the browser? And now I’m wondering if discord is closed when you’re trying to use it in the browser?
OK, and what happens when you run it while you have Discord closed and the browser open?
Ok, to be sure, I’ve did following:
Same behavior. Cam didn’t work.
lsof | grep --ignore-case /dev/vid returns nothing
v4l2-ctl --list-devices returns:
Logitech BRIO (usb-0000:00:14.0-1):
/dev/video0
/dev/video1
/dev/video2
/dev/video3
/dev/media0
It was… After reboot discord wasn’t started and I’d tried in the browser with the above described results.
But… I’d rememberd that I have a micro-cam here, so I’veplugged it in via USB. This cam work on the webpage.
So I’m afraid it’s some kind of setup issue … as the Logitech BRIO cam work only with zoom?
Sounds like some kind of permission issue…perhaps clear (reset) the browsers permissions?
Unfortunately it doesn’t work. I’ll reboot now with the windows partition and will see if the cam is recognized there. And maybe I will have a look if there is a firmware upgrade. Then I come back.
-------- .
@Mirdarthos @Aragorn
Ok, I’d tested the webcam at my windows partition. Is work as expected. There isn’t any new firmware at the logitech webpage.
But…
I’d installed the newest Kernel and reboot my pc.
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