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I am trying to get an older USB cam I have working and I m having issues. I am starting to believe that being an older model is causing the issues as at some point it also stopped working when i had ubuntu installed.
Anyway, following the guide from here I get the following:
Journal
Jan 30 13:34:23 jacks gsd-media-keys[2666]: Unable to get default source
Jan 30 13:34:23 jacks gsd-media-keys[2666]: Unable to get default source
Jan 30 13:34:30 jacks kernel: usb 1-11.4: new high-speed USB device number 127 using xhci_hcd
Jan 30 13:34:31 jacks kernel: usb 1-11.4: New USB device found, idVendor=046d, idProduct=0825, bcdDevice= 0.12
Jan 30 13:34:32 jacks kernel: usb 1-11.4: New USB device strings: Mfr=0, Product=0, SerialNumber=2
Jan 30 13:34:32 jacks kernel: usb 1-11.4: SerialNumber: 644C6AD0
Jan 30 13:34:32 jacks kernel: usb 1-11.4: Found UVC 1.00 device <unnamed> (046d:0825)
Jan 30 13:34:32 jacks kernel: usb 1-11.4: set resolution quirk: cval->res = 384
Jan 30 13:34:32 jacks mtp-probe[590382]: checking bus 1, device 127: "/sys/devices/pci0000:00/0000:00:14.0/usb1/1-11/1-11.4"
Jan 30 13:34:32 jacks mtp-probe[590382]: bus: 1, device: 127 was not an MTP device
Jan 30 13:34:32 jacks systemd[2437]: Reached target Sound Card.
Jan 30 13:34:32 jacks mtp-probe[590397]: checking bus 1, device 127: "/sys/devices/pci0000:00/0000:00:14.0/usb1/1-11/1-11.4"
Jan 30 13:34:32 jacks mtp-probe[590397]: bus: 1, device: 127 was not an MTP device
Jan 30 13:34:36 jacks systemd[2437]: Started Application launched by gsd-media-keys.
Jan 30 13:34:52 jacks systemd[2437]: Started Application launched by gsd-media-keys.lsusb
[...]
Bus 001 Device 006: ID 046d:0825 Logitech, Inc. Webcam C270
[...]$ v4l2-ctl --list-devices
UVC Camera (046d:0825) (usb-0000:00:14.0-11.4):
/dev/video0
/dev/video1
/dev/media0Now, if I try to run:
$ vlc v4l2://:input-slave=alsa://:v4l-vdev="/dev/video0"the vlc window opens, the led light on the camera is on, but no input shows up.
This is a recurring theme, I can normally "see" the webcam exists but it never works.
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I am starting to believe that being an older model is causing the issues as at some point it also stopped working when i had ubuntu installed.
Simple troubleshooting step, do you have access to a Windows machine where you might be able to confirm the webcam is working at all?
Last edited by Bink (2025-02-03 02:34:32)
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It sounds more like just a non-functional camera.
Maybe try removing the tape off the lens. LOL. (I've seen it more than once.)
I Am Canadian!
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Thank you for your responses.
It sounds more like just a non-functional camera.
Maybe try removing the tape off the lens. LOL. (I've seen it more than once.)
Turns out that's it. I've tried the camera on a windows laptop and it still doesn't work -- most probably a dead camera.
Funny thing is that when I first encountered this issue, I was working on an openCV project on ubuntu using two cameras (one of which is the camera in question), and had gotten into some v4l2 library shenanigans. Both of these cameras stopped working during a removal/re-installation cycle of v4l2 and relevant libraries and at that time I assumed it was likely a library issue (still do tbh). I know this is extremely far-fetched and probably impossible, but is there a chance I fried them due to wrong libs/drivers?
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It's unlikely that a library or a driver took down the camera. Usually it just wouldn't respond. I guess it's possible though. Possibly an over voltage.
I Am Canadian!
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