[mythtv-users] How to make static device nodes for video capture cards in MythTV .22?

[Rod Smith]

On Wednesday 09 December 2009 11:58:30 am Dave wrote:
>
> I did already make a udev rule (using the python script at the
> link<http://ubuntuforums.org/showthread.php?t=753434>I provided).
>
> Here's my rule:
> KERNEL=="video*", ATTR{name}=="ivtv0 encoder MPG", ATTRS{vendor}=="0x4444",
> KERNELS=="0000:01:04.*", SYMLINK+="video_PVR150"
>
> I added this rule to /etc/udev/rules.d/60-symlinks.rules
>
> I expected to see /dev/video_PVR150 as a choice in myth backend setup.
> However, it is not there, even after a reboot.

I haven't checked with 0.22, but with 0.21, the MythTV setup utility doesn't 
show video device files under non-standard names; you've got to type them in 
manually. Check in a shell to see if the file exists (as in "ls /dev/video*" 
to see all filenames in /dev that begin with "video"). If it does, then type 
the name in manually in the backend. If the file doesn't exist, then 
something is wrong with your udev configuration.

One other point: DO NOT add udev rules to the files in /etc/udev/rules.d that 
exist on a fresh installation. Instead, CREATE NEW files in /etc/udev/rules.d 
to house your rules. The reason is that most distributions are more than 
willing to replace the rules files that they create when packages are 
upgraded. If you modify one of those files, either your modifications will be 
wiped out or you'll not get the benefit of any upgrades (if they're marked as 
configuration files in the package). If you create a new udev rules file for 
your rules, they'll be safe from tampering and won't interfere with system 
updates.

For more information, check the MythTV wiki entry on udev rules:

http://www.mythtv.org/wiki/Device_Filenames_and_udev

-- 
Rod Smith