Hello Ubuntu forum,

I installed Kubuntu 6.10 (Edgy) a month ago and I am very pleased with it in every respect. It recognized both of my cx88 chip based capture cards immediately (Turtle Beach and TV Wonder Pro), and after I installed ivtv, it recognized my third capture card, the Hauppauge 150. So Kubuntu now recognizes all three of my capture cards and I am pleased once again.

But it wasn't until I actually needed to use the video devices (video0, video1, and video2) by my installing MythTV that I realized I have a problem.

The three video devices randomly switch places with each other during each reboot, causing me to constantly reconfigure my capture card in MythTV setup (I'm presently using only the Hauppauge card). For example, sometimes the Hauppauge card uses video0 and other times it will use video2 or video1 (ivtv-detect also shows this).

After doing a little Googling, I found out that this is caused by a bug in Kubuntu 6.10
https://bugs.launchpad.net/ubuntu/+bug/77332

Is anyone reading this savvy enough to show me how to keep these three video devices from switching places with one another during each reboot? Just for the record, the three video devices work fine once configured in MythTV. I am not a Linux expert.

I would truly appreciate your help.

Roy

This was a problem I had in 6.10 between a TV card and a webcam. You can overcome this problem by adding symbolic udev rules that will link /dev/video{n} of a particular device and vendor code to a new mount point. First use udevinfo to identify the device and vendor numbers as follows:

udevinfo -a -p $(udevinfo -q path -n /dev/video0)
udevinfo -a -p $(udevinfo -q path -n /dev/video1)
udevinfo -a -p $(udevinfo -q path -n /dev/video2)

You'll be most interested in the lines that look like:

ATTRS{device}=="0x0016"
ATTRS{vendor}=="0x4444"

Lastly create udev rules in /etc/udev/rules.d/95-perso.rules

KERNEL=="video*", SYSFS{vendor}=="0x4444", SYSFS{device}=="0x0016", SYSFS{name}=="ivtv0 encoder MPEG", SYMLINK+="video/pvr150"

Above is the udev rule that assigns a new symlink "video/pvr150" to whatever video{n} the system selects. The actual mount point will be /dev/video/pvr150

Create a rule for each TV card in a similar fashion.