[mythtv-users] Hauppauge PVR-500 - changed device nodes with latest kernel

[Nick Morrott]

On 20/07/2008, Calvin Dodge <caldodge at gmail.com> wrote:
> Hi,
>
>  I thought I'd give you all a heads up - I just rebooted my Fedora 8
>  system to the latest standard kernel (2.6.25.10-47.fc8), and found
>  that one of my PVR-500's tuners was "missing".
>
>  It turns out the video nodes were renumbered - formerly /dev/video0
>  and /dev/video1, now /dev/video1 and /dev/video2.
>
>  This may apply to other distros after a similar kernel upgrade, and I
>  suppose it may also apply to PVR-150s.

A reason to consider using udev rules to control V4L and DVB device
nodes. However, it is odd that /dev/video0 was not created (although
you haven't explicitly said this) - do you have any existing
customised udev rules, modprobe entries, or other video devices
installed in the machine?

There are frequently timing issues which can result in devices from
multiple cards/adapters being created with different device numbers
between reboots. udev rules or specific module parameters (such as
video_nr if supported, or ivtv_first_minor for ivtv cards) are the
best way to ensure that device numbers stay consistent over time.

-- 
Nick Morrott

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