06-23-2012 06:31 AM - last edited on 06-25-2012 12:01 PM by AntonC
1) Installed Ubuntu 12.04.
2) Connected C920, used `dmesg`
[ 160.714752] usb 3-1: new high-speed USB device number 2 using xhci_hcd [ 160.780147] Linux video capture interface: v2.00 [ 160.780627] uvcvideo: Found UVC 1.00 device HD Pro Webcam C920 (046d:082d) [ 160.781047] input: HD Pro Webcam C920 as /devices/pci0000:00/0000:00:1c.1/0000:03:00.0/usb3
/3-1/3-1:1.0/input/input9 [ 160.781111] usbcore: registered new interface driver uvcvideo [ 160.781114] USB Video Class driver (1.1.1) [ 160.975975] usbcore: registered new interface driver snd-usb-audio [ 168.696499] xhci_hcd 0000:03:00.0: WARN Event TRB for slot 1 ep 6 with no TDs queued? [ 168.696721] xhci_hcd 0000:03:00.0: WARN Event TRB for slot 1 ep 0 with no TDs queued?
06-29-2012 01:37 PM - edited 06-29-2012 05:46 PM
The source code for this camera is proprietary and not available for distribution.
07-10-2012 02:45 AM
OK - that is good. I have used for a long long long time C910 camera like 24/7 for unit test.
1) That camera never got frozen nor it get lost from Ubuntu lsusb lists or /dev/video.....
2) Since i started using C920 which i thought must be better then any other, turned out to be completely wrong. It often gets frozen or gets /dev/video0 or video1 or video2 lost.
Its really not stable as C910 was.
If the code is not available. Can someone please provide any link to download any compiled driver for Ubuntu distro's or some patch's?
07-10-2012 02:54 AM
How strange it is:
1) right now if i apply following it shows USB is there. Which means the device is with linux
Bus 003 Device 002: ID 046d:082d Logitech, Inc.
2) when i do query where is my camera? it should list 2 and this following camera is the other camera no the logitech
$ ll /dev/video*
crwxrwxrwx+ 1 root video 81, 0 Jul 10 09:31 /dev/video0
Just few minues ago it was /dev/video1 which was working and suddently it disappeared. Can anyone fix this bug or give us some hope of having a solution for this.
08-20-2012 12:15 PM
The C920 webcam is not supported on Ubuntu, so we cannot provide a compliant driver nor a patch.
Please check the FAQ Supported operating systems for the HD Pro Webcam C920 for further information.
09-25-2012 01:35 AM - edited 09-28-2012 02:14 PM
Same possible issue of needing a driver.
Under OpenSUSE 12.2 x64 with Skype 220.127.116.11 (Linux 32-bit version), video and sound are inconsistent.
I'm hoping to use this camera for conferencing for work. First time connecting USB I had video and no sound. I started an XP virtual machine, installed camera software and both sound and video worked from XP. I disconnected (through software) the XP USB so Linux could find the camera... nothing. So I physically unplugged the camera USB from my Linux system, counted to 5 and reconnected. Then Skype was able to see video and hear both microphones (touched left, then right, heard "touching" noises both times).
Bus 008 Device 011: ID 046d:082d Logitech, Inc.
% ll /dev/vi*
crw-rw----+ 1 root video 81, 0 Sep 25 00:04 /dev/video0
Here is a capture of working Skype Linux audio configuration:
Here is a capture of working Skype Linux video configuration:
If Logitech changes their position on providing a Linux driver for the C920, put me on the list to be notified. I bought this camera because it has a camera mount, does 1080p x264, and Stereo sound (assuming Hi-Fi). I believed these capabilities would make it useful for lab use (documentation; stills and video) and conferencing (initially Skype) with lower bandwidth communication requirements achieved using x264 encoding.
09-28-2012 07:51 PM - edited 09-28-2012 07:57 PM
Bottom line: Logitech C920 Linux 720p/H.264 (1280x720) video over the Linux Skype 18.104.22.168 connection using stock Linux UVC video drivers and stock Linux PulseAudio System drivers to my Windows Vista Skype 22.214.171.124 laptop.
Ok, I hate to answer my own question, but it took me while to find the "technical call data" option which gave me what I need to know. I'm not a sophistcated Skype user, in fact I hardly ever use Skype. Fortunately they've made it easy to use once it's running.
The Linux side is doing 720p/H.264 using (guestimating from a network usage graph) 270Kbits/sec of network bandwidth. The Skype technical data lines below which tell me resolution/format are:
Video capture:Res: 1280x720, Color: 47504a4d, CamFPS: 28, ReqFPS: 30, HwEnc: 0, Power: 0, QTokens: 1010 video send stream 0 (l): ID: 0, Type: 0/0, Res: 1280x720, Codec: H264 (100/32), FPS 28, Speed: 6/11, Bitrate: 2087/3641, TargetFPS: 30/30, CPU: 36, CpuFPS: 38/36, ReceiverFPS: 25/0/30,
My Windows Vista Laptop Skype is using SILK_V3 640x480 which looks okay by itself, but looks like mud next to 720p
ObjID: 5613 Codec: SILK_V3 Jitter: 20 Sample rates: e-24000, d-24000 Packet loss: 0.0% (0) Send packet loss: 0.0%/0.0% Recv packet loss: 0.0%/0.0% Roundtrip: 2 ms NBM: audio 5000 / 20 ms video 455130 corr 0% SessionOut: UDP (940629 packets) SessionIn: UDP (537914 packets) Relays: 0 UDP status: local:Good remote:Good CPU usage: 34.1% -1.0% hicc:0 Remote UI version: 0/126.96.36.199// Video capture:Res: 1280x720, Color: 47504a4d, CamFPS: 28, ReqFPS: 30, HwEnc: 0, Power: 0, QTokens: 1010 video send stream 0 (l): ID: 0, Type: 0/0, Res: 1280x720, Codec: H264 (100/32), FPS 28, Speed: 6/11, Bitrate: 2087/3641, TargetFPS: 30/30, CPU: 36, CpuFPS: 38/36, ReceiverFPS: 25/0/30, Mtu: 1340 video send stream 1: not started. video send stream 2: not started. video send stream 3: not started. video send stream 4: not started. video send stream 5: not started. mjunk60's video recv: Res: 640x480, Color: 30323449, FPS: 15, QTokens: 8, PRmax: 648x486, Scr: 0x0, ScrPh: 0x0, Delay: 18/1000 ID: 0, Type: 0/0, Res: 640x480, Codec: H264 (100/32), FPS 15/14, Bitrate: 989, Caps: 120/163
So it's definite. The Linux machine running Skype is communcating 720p/H.264, basically Skype is using the best camera abilities it is designed to use over the stock Linux UVC/PulseAudio System, which BTW is why I bought the Logitech C920 camera! Both Video and Audio appear to work consistently through several power off/on reboots.
Video quality is good enough that unfortunately it's obvious I didn't do a good job shaving today.
10-14-2013 08:43 PM - edited 10-14-2013 08:44 PM
I'm glad I read this thread first. I was about to spend the money for one of these C920 Logitech webcams, but if Linux support is "take what you can get," then I'm not going to spend the money for a premium camera. I will purchase a product from a competitor. You just lost a $99 sale, Logitech.
I would be purchasing this camera to use exclusively with an Ubuntu Linux desktop.