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Thread: Logitech C270 usb webcam recognised in lsusb but not in software

  1. #1
    Join Date
    Aug 2013
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    41

    Logitech C270 usb webcam recognised in lsusb but not in software

    Hi,

    Ubuntu 16.04 LTS, with a logitech usb c270 webcam attached. Cheese / skype etc. don't see it, but it is present in lsusb:

    Code:
    # lsusb
    Bus 002 Device 005: ID 046d:0825 Logitech, Inc. Webcam C270
    Bus 002 Device 004: ID 1058:1001 Western Digital Technologies, Inc. Elements Desktop (WDE1U)
    Bus 002 Device 003: ID 20e8:5861
    Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
    Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
    Bus 001 Device 005: ID 05e3:0608 Genesys Logic, Inc. Hub
    Bus 001 Device 004: ID 05e3:070e Genesys Logic, Inc. USB 2.0 Card Reader
    Bus 001 Device 003: ID 15c2:0036 SoundGraph Inc. LC16M VFD Display/IR Receiver
    Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
    Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
    Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
    Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
    I've tried unplugging and plugging into a different usb port. Can anyone suggest how to get it working?

    thanks

  2. #2
    Join Date
    Aug 2013
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    41

    Re: Logitech C270 usb webcam recognised in lsusb but not in software

    Saw this on another thread, unplugged and replugged in then dmesg:

    Code:
    [    4.866079] uvcvideo: Failed to query (GET_MIN) UVC control 3 on unit 1: -32 (exp. 1).
    [    4.868888] uvcvideo: Failed to query (GET_MIN) UVC control 3 on unit 1: -32 (exp. 1).
    [    4.871878] uvcvideo: Failed to query (GET_MIN) UVC control 3 on unit 1: -32 (exp. 1).
    [    4.874632] uvcvideo: Failed to query (GET_MIN) UVC control 3 on unit 1: -32 (exp. 1).
    [    4.877386] uvcvideo: Failed to query (GET_MIN) UVC control 3 on unit 1: -32 (exp. 1).
    [    4.890496] uvcvideo: Failed to query (GET_MIN) UVC control 3 on unit 1: -32 (exp. 1).
    [    4.893641] uvcvideo: Failed to query (GET_MIN) UVC control 3 on unit 1: -32 (exp. 1).
    [    4.896265] uvcvideo: Failed to query (GET_MIN) UVC control 3 on unit 1: -32 (exp. 1).
    [    4.899284] uvcvideo: Failed to query (GET_MIN) UVC control 3 on unit 1: -32 (exp. 1).
    [    4.902576] uvcvideo: Failed to query (GET_MIN) UVC control 3 on unit 1: -32 (exp. 1).
    [    4.905640] uvcvideo: Failed to query (GET_MIN) UVC control 3 on unit 1: -32 (exp. 1).
    [    5.248708] IPv6: ADDRCONF(NETDEV_UP): enp3s0: link is not ready
    [    5.352700] r8169 0000:03:00.0 enp3s0: link down
    [    5.352785] IPv6: ADDRCONF(NETDEV_UP): enp3s0: link is not ready
    [    5.353048] r8169 0000:03:00.0 enp3s0: link down
    [    6.098080] ip_tables: (C) 2000-2006 Netfilter Core Team
    [    7.352653] r8169 0000:03:00.0 enp3s0: link up
    [    7.352660] IPv6: ADDRCONF(NETDEV_CHANGE): enp3s0: link becomes ready
    [   11.272050] usb 2-1.7: reset high-speed USB device number 5 using ehci-pci
    [   53.839664] uvcvideo: Failed to query (GET_MIN) UVC control 3 on unit 1: -32 (exp. 1).
    [   55.825949] uvcvideo: Failed to query (GET_MIN) UVC control 3 on unit 1: -32 (exp. 1).
    [   57.773452] uvcvideo: Failed to query (GET_MIN) UVC control 3 on unit 1: -32 (exp. 1).
    [ 3819.400661] usb 2-1.7: USB disconnect, device number 5
    [ 3842.407551] usb 2-1.7: new high-speed USB device number 6 using ehci-pci
    [ 3842.732433] usb 2-1.7: New USB device found, idVendor=046d, idProduct=0825
    [ 3842.732438] usb 2-1.7: New USB device strings: Mfr=0, Product=0, SerialNumber=2
    [ 3842.732440] usb 2-1.7: SerialNumber: 7CD77CA0
    [ 3842.732880] uvcvideo: Found UVC 1.00 device <unnamed> (046d:0825)
    [ 3842.852737] uvcvideo 2-1.7:1.0: Entity type for entity Extension 4 was not initialized!
    [ 3842.852741] uvcvideo 2-1.7:1.0: Entity type for entity Extension 6 was not initialized!
    [ 3842.852743] uvcvideo 2-1.7:1.0: Entity type for entity Extension 7 was not initialized!
    [ 3842.852745] uvcvideo 2-1.7:1.0: Entity type for entity Processing 2 was not initialized!
    [ 3842.852747] uvcvideo 2-1.7:1.0: Entity type for entity Extension 3 was not initialized!
    [ 3842.852749] uvcvideo 2-1.7:1.0: Entity type for entity Camera 1 was not initialized!
    [ 3842.852861] input: UVC Camera (046d:0825) as /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.7/2-1.7:1.0/input/input21
    [ 3844.014431] usb 2-1.7: set resolution quirk: cval->res = 384
    [ 3844.157411] uvcvideo: Failed to query (GET_MIN) UVC control 3 on unit 1: -32 (exp. 1).
    [ 3844.160163] uvcvideo: Failed to query (GET_MIN) UVC control 3 on unit 1: -32 (exp. 1).
    [ 3844.162892] uvcvideo: Failed to query (GET_MIN) UVC control 3 on unit 1: -32 (exp. 1).
    [ 3844.165650] uvcvideo: Failed to query (GET_MIN) UVC control 3 on unit 1: -32 (exp. 1).
    [ 3844.168401] uvcvideo: Failed to query (GET_MIN) UVC control 3 on unit 1: -32 (exp. 1).
    [ 3844.171152] uvcvideo: Failed to query (GET_MIN) UVC control 3 on unit 1: -32 (exp. 1).
    [ 3844.174026] uvcvideo: Failed to query (GET_MIN) UVC control 3 on unit 1: -32 (exp. 1).
    [ 3844.177026] uvcvideo: Failed to query (GET_MIN) UVC control 3 on unit 1: -32 (exp. 1).
    [ 3844.179905] uvcvideo: Failed to query (GET_MIN) UVC control 3 on unit 1: -32 (exp. 1).
    [ 3844.182777] uvcvideo: Failed to query (GET_MIN) UVC control 3 on unit 1: -32 (exp. 1).
    [ 3844.185517] uvcvideo: Failed to query (GET_MIN) UVC control 3 on unit 1: -32 (exp. 1).
    [ 3844.188400] uvcvideo: Failed to query (GET_MIN) UVC control 3 on unit 1: -32 (exp. 1).
    [ 3844.191277] uvcvideo: Failed to query (GET_MIN) UVC control 3 on unit 1: -32 (exp. 1).
    [ 3844.194145] uvcvideo: Failed to query (GET_MIN) UVC control 3 on unit 1: -32 (exp. 1).
    
    # uname -a
    Linux myth 4.13.0-38-generic #43~16.04.1-Ubuntu SMP Wed Mar 14 17:48:43 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
    Last edited by z7APXKm; May 6th, 2018 at 05:46 PM.

  3. #3
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    Re: Logitech C270 usb webcam recognised in lsusb but not in software

    Complete dmesg here:
    https://pastebin.com/SFuWqqHc

  4. #4
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    Re: Logitech C270 usb webcam recognised in lsusb but not in software

    OK, I figured it out. C270 usb webcam is actually plug and play, but my sources.list file was messed up, meaning I needed to rebuild it, apt-get upgrade && apt-get update and reboot.

  5. #5
    Join Date
    Aug 2013
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    41

    Re: Logitech C270 usb webcam recognised in lsusb but not in software

    I know I'm talking to myself again, but It worked for all of half an hour, then I reinstalled the open source driver for my TBS6280 freeview tuner card. Now I'm back to square one. Any ideas?

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