[linux-dvb] Re: Full featured card summary

[Klaus Schmidinger <Klaus.Schmidinger@cadsoft.de>]

Andreas Oberritter wrote:
> 
> Hi,
> 
> On Sun, 2004-03-14 at 23:46, Andrew de Quincey wrote:
> > I suppose its a matter of how tolerant we want to be of userspace programs.. I
> > mean, we already turn OFF the LNB power automatically, why not turn it on as
> > well?
> 
> I don't care much, but please don't change the voltage setting in the
> inittab, because it breaks support for the ves1893 and ves1993 on the
> other (non-pci) boards, where the gpio pins toggled by this register
> have a different meaning.
> 
> If you decide to set the voltage of all frontends to 13V at open(), then
> checking for O_RDWR should be sufficient to decide, because only one
> writer is allowed.
> 
> However, I don't like that idea. It makes it impossible to stay at 0V,
> when the frontend is connected to a loop through output of another
> receiver, which shall not be disturbed. Userspace apps can choose the
> desired voltage anyway after opening the device.

Ok, if it is defined behaviour that the driver does _not_ turn on LNB
power when opening the frontend, that's fine with me - I have a workaround
in VDR now. I just wasn't aware of this change, and apparently it has nothing
to do with the actual problem of DiSEqC switching being unreliable with dvb-kernel.

Klaus


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