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Camera Lumens DC 125 freezes Fedora 19 and 20

asked 2013-11-29 09:33:20 -0600

ccsc gravatar image

updated 2014-02-13 13:47:19 -0600

mether gravatar image

The camera is working fine in Windows, OSX and Ubuntu but it freezes Fedora when I plug it in. At first, most of the errors seemed to be sound related so I created a conf file under udev to ignore any form of input other than video from the camera.

Gstreamer-properties hangs most times when the camera is plugged, sometimes I get to the point where I can select the camera as input but it fails the test with 'Video for Linux 2 (v4l2)': Device '/dev/video0' cannot capture at 1600x1200 .


v4l2-ctl reports unknown colorspace when I can get it to work and other times it throws that the device is busy.

I rebuilt uvcvideo from source, installed all available plugins and tried most fixes around. I also tried setting up an Ubuntu virtualbox and plugging the camera but I get a load error. I got the same errors in a physical installation of Fedora 19 and two virtual machines (19 and 20). Ubuntu physical installation and a virtual machine in Windows worked straight away with good picture from the camera, no extra drivers installed and no errors reported.

Any suggestions?

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Try and make its setup as similar as possible to the Ubuntu one -drivers, config etc - thats how I got an old USB camera working. The problem is, Ubuntu is good at drivers, but in Fedora it ain't always as simple

wilf gravatar imagewilf ( 2013-11-30 09:58:37 -0600 )edit

That is what I've been trying to do but the freezing + no errors afterwards is making it much harder. I suspect that the unknown colorspace might be the source of the problem but I can't find a way to force sRGB to verify.

ccsc gravatar imageccsc ( 2013-11-30 11:42:42 -0600 )edit

You could use lspci -v to find the drivers it is using in Ubuntu.

wilf gravatar imagewilf ( 2013-12-01 18:10:09 -0600 )edit

It is a USB camera, lspci won't be very useful. I'm trying to find something with lsusb -v and lshw in Ubuntu.

ccsc gravatar imageccsc ( 2013-12-02 04:53:56 -0600 )edit

lshw - and the previous comment inidicates that I should not post comments after 8 hours of work - lsusb -v I meant. You may need to install lshw with sudo yum install lshw lshw -gui, and then you can also use the graphical interface called 'Hardware Lister'

wilf gravatar imagewilf ( 2013-12-02 06:12:49 -0600 )edit

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answered 2013-12-04 18:08:30 -0600

ccsc gravatar image

I "fixed" it by doing the following (it's far from a good fix but I get video out):

  1. Install gnome-media gnome-media-apps guvcview (+ dependencies). This fixes some of the issues with uvcvideo.
  2. Create lumens.conf at /etc/X11/xorg.conf.d and add the following

    Section "InputClass" Identifier

    "disable Lumens buttons" MatchProduct

    "DHK107" Option "Ignore" "on"


  3. Blacklist snd-usb-audio by adding

    blacklist snd-usb-audio

    to /etc/modprobe.d/blacklist.conf

  4. Reboot, plug camera. No freezing, cheese works, good quality picture.

Issues still to address:

  • Key toggling: camera buttons are seen as input but keys seem to be constantly pressed leading to the first fix.
  • Usb microphone: Since snd-usb-audio is blacklisted, I can't use the usb microphone. ALSA needs to be patched to fix the volume range problem. Issues related to clock.c and pcm.c also exist but I don't know yet how to fix.
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Asked: 2013-11-29 09:33:20 -0600

Seen: 286 times

Last updated: Dec 04 '13