[mythtv-users] Powersaving

[David Watkins]

On 16 June 2011 13:48, Brian Long <briandlong at gmail.com> wrote:
> On Thu, Jun 16, 2011 at 8:25 AM, Per Kofod <per.s.kofod at gmail.com> wrote:
>> Hi
>>
>> I am new to using mythtv, and is currently running it on my desktop PC while
>> waiting for the parts for building a HTPC.
>>
>> I have managed to set mythtv up so shut down automaticaly when not busy, and
>> set the bios time to restart the the computer in time for the next
>> recording, all very well. I used the method described on this page:
>>
>> http://www.mythtv.org/wiki/ACPI_Wakeup
>>
>> I would however like to take this one step further, as I would like to
>> make sure,  that if shutdown is executed, I would like to have a script, that will
>> check if  mythbackend is busy and not shut down if that is the case, or if mythbackend
>> is not busy, set the wakeup time, if a later recording is scheduled.
>>
>> So my question is:
>>
>> 1: Does mythtv have a command, that will tell if the backend is busy?
>> 2: Does mythtv have a command, that will return the time of the next
>> recording? (or 0 if none).
>
> Per, you should be using mythshutdown to determine if/when to shutdown.
>
> mythshutdown -h
> Usage of mythshutdown
> -w/--setwakeup time      (sets the wakeup time. time=yyyy-MM-ddThh:mm:ss
>                          doesn't write it into nvram)
> -t/--setscheduledwakeup  (sets the wakeup time to the next scheduled recording)
> -q/--shutdown            (set nvram-wakeup time and shutdown)
> -x/--safeshutdown        (equal to -c -t -q.  check shutdown possible, set
>                           scheduled wakeup and shutdown)
> -p/--startup             (check startup. check will return 0 if automatic
>                                                           1 for manually)
> -c/--check flag          (check shutdown possible
>                          flag is 0 - don't check recording status
>                                  1 - do check recording status (default)
>                          returns 0 ok to shutdown
>                                  1 reset idle check)
> -l/--lock                (disable shutdown. check will return 1.)
> -u/--unlock              (enable shutdown. check will return 0)
> -s/--status flag         (returns a code indicating the current status)
>                          flag is 0 - don't check recording status
>                                  1 - do check recording status (default)
>                          0 - Idle
>                          1 - Transcoding
>                          2 - Commercial Detection
>                          4 - Grabbing EPG data
>                          8 - Recording - only valid if flag is 1
>                         16 - Locked
>                         32 - Jobs running or pending
>                         64 - In a daily wakeup/shutdown period
>                        128 - Less than 15 minutes to next wakeup period
>                        255 - Setup is running
> -v/--verbose debug-level (Use '-v help' for level info
> -h/--help                (shows this usage)
>


.. but if your needs are simple mythbackend can handle this automatically.

In mythtv-setup  / General

configure mythbackend to "Shutdown on Idle"

and point to a suitable script to be run on shutdown passing it the
%time parameter which mythbackend will set to the time of the next
recording

and a suitable command to shutdown the system.

Then, when the backend is not recording or transcoding, and no
frontends are connected mythtbackend will pass the time of the next
recording to your script, which you can use to configure the ACPI
wakeup, and shutdown the system.

Works Well

http://www.mythtv.org/wiki/ACPI_Wakeup#Integrate_into_mythTV_2


or use the mythwelcome application which does the above (and more) for you

http://www.mythtv.org/wiki/Mythwelcome