Videocard and Webcam

Jongi · 02-12-2008, 02:13 PM

I've installed a webcam (Logitech Quickcam Messenger) and a TV Card (Leadtek TV200XP Expert). Both work fine.

The small problem I have is that at each reboot, they seem to interchange between /dev/video0 and /dev/video1. The problem is then that things like xdtv will be setup to load the TV as /dev/video1, but when the TV Card is /dev/video0 xdtv will try to get video from the webcam. Same kind of issue with skype 2 beta. And for 3 reboots they may stay unchanged, then bam. Changes.

How do I get each device to be always loaded as /dev/video0 and /dev/video1 respectively. That is force them not to interchange. I don't care which is video0 and which is video1 as long as they just stay fixed.

comprookie2000 · 02-12-2008, 04:10 PM

This may help;
http://www.gossamer-threads.com/list...v/users/311042

Jongi · 03-02-2008, 08:20 AM

Thanks but my card doesn't use ivtv, just v4l.

comprookie2000 · 03-02-2008, 08:38 AM

Well then I would set up that option.

Jongi · 03-05-2008, 05:16 PM

From your reply it seems it should be an easy thing to do. Is it a simple matter of installing the livna ivtv driver for F8?

Code:

[root@localhost ~]# /sbin/lspci -v | grep cx
        Kernel driver in use: cx8800
        Kernel modules: cx8800
[root@localhost ~]# /sbin/lspci -v | grep CX
00:0b.0 Multimedia video controller: Conexant CX23880/1/2/3 PCI Video and Audio Decoder (rev 05)
[root@localhost ~]# lsmod | grep cx
cx8800                 39549  0
cx88xx                 70629  1 cx8800
ir_common              40005  1 cx88xx
i2c_algo_bit           14149  1 cx88xx
video_buf              29380  2 cx8800,cx88xx
tveeprom               24913  1 cx88xx
compat_ioctl32         16192  2 cx8800,gspca
videodev               33857  3 cx8800,cx88xx,gspca
v4l2_common            25921  5 tuner,cx8800,cx88xx,compat_ioctl32,videodev
i2c_core               28865  7 lm90,nvidia,tuner,cx88xx,i2c_algo_bit,tveeprom,i2c_viapro
btcx_risc              12489  2 cx8800,cx88xx

Code:

[root@localhost ~]# smart search ivtv
Loading cache...
Updating cache...                                             ###################################################################################### [100%]

ivtv-firmware - Firmware for the PVR 250/350/150/500 model series

Saving cache...

comprookie2000 · 03-05-2008, 05:53 PM

No in your modprobe.conf or with udev you should be able to set up the options for /dev/video1 /dev/video0 so they are the same each time. But I really don't know where that is on debian, but may help get you started. In the link I was looking at this part.

Quote:

you can add to
> your modprobe.conf and set it to 1. This will cause the PVR to always
> be on /dev/video1 leaving /dev/video0 open for the ATSC card no matter
> what order the drivers load in.

On Gentoo I can edit /etc//udev/rules.d/ but I don't know about debian.
sorry I didn't explain better ...

Electro · 03-05-2008, 11:56 PM

Do not edit your udev rules. Gentoo developers provided a file that is used to personalized udev further with out messing up present and future udev rules. I suggest create 10-local.rule in /etc/udev/rules.d.

To make sure one card gets designated as /dev/video0 and the other gets designated as /dev/video1. Use /sbin/modinfo module_name to get a list of module options. Usually it is index or it could be card, but it depends on the developer.

I suggest add the following to /etc/modules.conf for most distributions, but comply to rules of the distribution.

options module_name index=X

The X designates a number from 0 to 9 or it could go up to 255 (I think). The number 0 is the first card and 1 will be the second card.

For your setup, it could be the following lines.

options cx8800 video_nr=0
options gspca index=1

Before using the options above, check the options of the module to see if they are correct.

Jongi · 03-07-2008, 02:47 PM

Electro I've rebooted once since using that and it is as I want it.

I guess if I don't post again we will know it worked.

Thanks in advance.