Hello again,
a simple bash script that you can run with
start-stop-daemon --start --background --exec /path/to/file
will do the job. Just adjust the value "timeout_sec" (time in seconds
after function timeout() will be called), "freq_sec" (time in seconds
of the pause between two checks) and
"substream" (/proc/asound/[substream]/status must exist, this card
channel will be monitored).
Greets
Torsten
#!/bin/bash
function timeout()
{
echo "Timeout"
exit
}
timeout_sec=5
freq_sec=2
substream=card0/pcm0p/sub0
last_usage=`date +%s`
while true; do
now=`date +%s`
if [ "`cat /proc/asound/${substream}/status`" != "closed" ]; then
last_usage=${now}
fi;
if [ `expr ${now} - ${last_usage}` -gt ${timeout_sec} ]; then
timeout
fi;
sleep ${freq_sec}
done
On Fri, 23 Mar 2012 09:07:02 +0100
Robert Bude <rupat@xxxxxxxx> wrote:
>
>
> hi everybody,
>
> at home i have a mythbuntu media pc. it will shutdown
> if no tv recording is sheduled and no user programs like mediaplayers
> webbrowsers and so on open. this works with an preshutdown script
> which simply checks if one of the programs i define is still active.
> this works very good. the only problem is that sometimes i forgott to
> close vlc player or some other programs.
>
> so i have a new good idea to safe
> power consumption ;) my new plan is to monitor if the pc outputs
> sound. if this pc gives no music or tv sound it is on for nothing !
> the best way i think is to monitor the output of soundcard or device
> if there is activity at the last 15 minutes. if not shutdown.
>
> But how i can detect
> this ?
>
> Any hints or new directions are very welcome
>
> ps: i had a idea
> to detect when als is going in power safe mode, but this only works if
> outputs set to mute. so this is no alternative.
>
> Greetings from Robert
> from Cottbus, Germany !
>
>
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