[mythtv-users] Great experience with MythTV

Another Sillyname anothersname at googlemail.com
Sun Apr 3 21:47:25 UTC 2011


On 03/04/2011, Nick Rout <nick.rout at gmail.com> wrote:
> On Mon, Apr 4, 2011 at 1:51 AM, Another Sillyname
> <anothersname at googlemail.com> wrote:
>
>>
>>
>> Just to add an information footnote to this thread.
>>
>> If you have different tuner card types in your backend you can find
>> that sometimes they will load in the Kernel in a different order, this
>> is down to how fast a card starts up and signals it's availability in
>> either a warm or cold reboot.
>>
>> Therefore if you have a mix of physical card types it's wise to
>> blacklist them all loading on boot and write a script that loads them
>> in a specific order with sleep commands between each card load
>> command, this will avoid you for example trying to record DVB-T
>> recordings in your DVB-S card that loaded quicker this boot.
>
> Or do what the system is designed to do and make udev rules so that
> the dvbs card is always /dev/dvb/sat-card and the dvbt card is always
> /dev/dvb/terrestial-card (or whatever naming system works for you).
>
> Also under your scheme you risk mythbackend starting before the cards
> are loaded fully, a combination of your sleep commands and the fact
> that the script to start them is probably quite a long way down the
> startup train.
>
> If you use udev, you can write your mythbackend init script to ensure
> that it loads after udev is finished, I read how to do this in the
> mythbuntu forums, and will find a link if anyone wants one.
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>
There's no risk of mythbackend starting before the cards have loaded
as mythbackend is called by the tuner load script.  The script is
called from rc.local, while I appreciate you could achieve the same
using udev rules most people can throw together a blacklist and module
loading script fairly easily.

Anyway how you choose to do it is not the point, it's the fact that
you need to make sure it's addressed.


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