[mythtv] Auto-Off Feature

Christian Hoenig me at christianhoenig.de
Mon Nov 24 10:27:56 EST 2003


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Hi,

> I have been working on a Myth box for a few months. One of the things that
> bugged me early on is the noise and power consumption associated with
> running a Myth box. While there are some things which you can do to
> minimize these problems (I have built a PC enclosure), I still was not
> satisfied. Ideally I wanted something more like a VCR which is basically
> dormant until its needed.
>
> I started looking into whether it would be possible to shutdown the myth
> box while not in use. I soon discovered that modern bios support alarm
> wakeup from cold on x day at y time. With the help of other project
> (NVRAM-Wakeup) and some bash scripting and a small add on module to myth, I
> have now got a rudementary system with works. The basic logic that I have
> come up with as follows: The PC will now startup a few minutes before the
> next program is due to be recorded. Once the show has finished recording,
> it will calculate the next wakeup time, set the CMOS alarm and switch the
> PC off. (There is also some logic to ensure that you can view shows). Thus
> setup runs much like the VCR model.

As always, when an 'autoshutdown' feature question is raised, I come with my 
patch that does that :-)

I have a patch for mythtv, that includes the shutdown/wakeup stuff into the 
scheduler. It is not accepted for cvs, because a little thing is missing and 
I don't know of a easy way to solve that problem. Unfortunately nobody who 
said 'thats a really easy thing to do' came up with some help yet. 
So thats still the state of the patch.

It works fine with a user defineble shutdown and wakeup method and works here 
on my box since over a year now without problems.

The patch can be found in the -dev archives, but if anybody wants a current 
version [maybe to help out with this little problem ;-) ], I will diff a new 
one!

take care, have fun
/christian
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