Re: udev problem DVB-S/T Cards

[Matthias Schwarzott <zzam@gentoo.org>]

On Mittwoch, 2. Mai 2007, Matthias Schwarzott wrote:
> On Samstag, 28. April 2007, Razza wrote:
> > All,
> > I have been playing with udev as I need to pin specific identical DVB
> > cards to specific nodes, mixing DVB-S and DVB-T is bad!
> > I have found how to identify cards etc. but getting the rule right is
> > confusing me. I am running Fedora Core 5 and have the following standard
> > rule in "/etc/udev/rules.d/50-udev.rules" -
> >
> > SUBSYSTEM="dvb", PROGRAM="/bin/sh -c 'K=%k; K=$${K#dvb}; printf
> > dvb/adapter%%i/%%s $${K%%%%.*} $${K#*.}'", NAME="%c", MODE="0660"
>
> Some time ago I also tried this. But it will end up like persistent-net
> then. You need good criteria to name the devices. Else it will only be
> chaos. And most apps does not work with holes in the numbering as they just
> open devices starting from 0, until open fails.

>
> SUBSYSTEM!="dvb", GOTO="dvb_end"
> ACTION!="add", GOTO="dvb_end"
>
> GROUP="video"
> import{PROGRAM}="/bin/sh -c 'K=%k; K=$${K#dvb}; echo
> ID_DVB_ADAPTER_KERNEL=$${K%%%%.*}; echo ID_DVB_DEVICE=$${K#*.}'"
>
> IMPORT{program}="path_id %p"
>
> #Here set ID_DVB_ADAPTER to be persistent
> # example:
> ENV{ID_PATH}="pci-0000:00:0b.0-", ENV{ID_DVB_ADAPTER}="0"
> ENV{ID_PATH}="pci-0000:00:0a.0-", ENV{ID_DVB_ADAPTER}="1"
>
> # fallback-number
> ENV{ID_DVB_ADAPTER_KERNEL}="?*", ENV{ID_DVB_ADAPTER}!="?*",
> ENV{ID_DVB_ADAPTER}="$env{ID_DVB_ADAPTER_KERNEL}"
>
> # Create device
> ENV{ID_DVB_ADAPTER}="?*", ENV{ID_DVB_DEVICE}="?*",
> NAME="dvb/adapter$env{ID_DVB_ADAPTER}/$env{ID_DVB_DEVICE}"
>
>
> LABEL="dvb_end"
>
> But this is untested.
>
> The same problem will appear with all other devices being just numbered,
> like video and audio devices.
>
> The simplest solution is to just blacklist the drivers from autoloading,
> and then load them in predefined/known order.
>

I think I forgot the part that you need to change path_id to accept 
dvb-devices. This was just a small change, but I dont have it on my disk 
right now.

Matthias

-- 
Matthias Schwarzott (zzam)

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