[linux-dvb] Re: [POLL] kdvb-fe, tune at initialisation, powermanagement

[Holger Waechtler <holger@convergence.de>]

Justin Cormack wrote:
> Why not make bringing up the network interface also disable power
> management, in the same way as an open fd. It is after all "open" in a
> similar sense...

We would have to implement some refcounting then...

Holger


> 
> Justin
> 
> On Tue, 2002-10-29 at 11:18, Wolfgang Wershofen wrote:
> 
>>Dienstag, 29. Oktober 2002 at 10:13 Holger Waechtler wrote:
>>
>>(...)
>>
>>
>>>The bad thing is that you explicitly have to disable power management 
>>>for networking over DVB (or run an application all the time which 
>>>processes frontend events;)
>>
>>Does this mean, you'll have to tune the card new every time, the card is
>>revived. Or the other way round: does tuning e.g. with dvbtune wake up
>>the card?
>>
>>I run my budget-card only for sat-networking purposes in a router. At
>>the moment I tune the card right after booting to the desired freq, set
>>up the network interface and I'm done with that. If I were to use power
>>management in that router (which I do not at the moment), would I have
>>to tune the card every time, a connection to the internet is requested
>>to make shure, the card is awake and has the right frequency?
>>What happens to the network-interface, when the card is powered down?
>>Do I have to re-ifconfig this? This would add some additional seconds
>>during connection, which is a disadvantage for dial-on-demand systems.
>>
>>So I think, one has to decide between dial-on-demand and power
>>management, when you apply the suggested changes. That's no problem for
>>me but may be for others. Wouldn't it be possible to introduce some kind
>>of driver option, with which the user can enable or disable power
>>management according to his/her needs?
>>
>>-- 
>>Best regards
>>Wolfgang Wershofen                            mailto:wolfgang@wershofen.com
>>
>>
>>
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> 
> 
> 
> 
> 



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