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<div class="moz-cite-prefix">On 6/25/20 10:36 AM, DaveD wrote:<br>
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<p>Doesn't the RPI need power removed to get a full shutdown and,
more importantly, have power re-applied to get it to start back
up? Does it have a sleep mode that can be pre-programmed to
wake up in time for the next recording? I can see the RPI used
for a FE or always-on BE, but how do you get it to power up and
down?</p>
<p>If you watch the lights on a Pi during shutdown, the green
light flashes 10 times, then stays on steady until the SD card
has done its internal updates of the pending writes, then the
green light goes out, indicating it's time to pull the plug.
(this seems to have changed on the Pi4; no steady-on at the
end) Any plug-pulling before then and all bets are off on the
integrity of the card. Learned that the hard way...<br>
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<p>Dave D.<br>
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<p>From my reading and experience, the RPi has no power management
so no sleep or hibernate modes. If you do a shutdown it requires
the power to be removed before it will reset. I use the Canakit
PS which comes with a push button switch to remove power.</p>
<p>IMHO, the RPi consumes less power running than my X86_64 PC
mythbackend in suspend mode. I've never had a mythbackend
successfully suspend and resume correctly more than a few times.
So I just run mine 24/7 with a UPS backend to ride me thru the
glitches. I leave my RPi4 mythbackend on all the time as well. <br>
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<p>Jim A</p>
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<div class="moz-cite-prefix">On 6/25/20 4:52 AM, jksjdevelop
wrote:<br>
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<p>Just recently added a slave backend to my system which works
very well.</p>
<p>Uses a Rasberry Pi to host a Hauppauge Dual HD USB tuner.</p>
<p>Has anybody got a way to shut the slave down after the last
recording of the day?</p>
<p>I use the <a moz-do-not-send="true"
href="https://www.mythtv.org/wiki/Idle_Screen">Idle Screen</a>
on the master frontend to shut it down after recordings have
finished and the front end is no longer in use. The slave
backend seems to act like a remote frontend in that it keeps
the system going until it is shut down manually.</p>
<p>This behaviour is not fully consistent, sometimes it does not
keep the master awake but ignoring that I am looking for a
method of automatically shutting it down.</p>
<p>I thought a possible solution would be to invoke slave
shutdown using SSH from the master as part of its shutdown
routine but that will not work as the slave is keeping the
master alive.<br>
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