[mythtv-users] Slave Backend Shutdown

[jksjdevelop]

All true but the power consumption is so low its probably adequate to 
stop the slave at shutdown and starting it when the master boots up. 
Just need an event on the Master to trigger off.

On 25/06/2020 17:00, Jim Abernathy wrote:
>
>
> On 6/25/20 10:36 AM, DaveD wrote:
>>
>> 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?
>>
>> 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...
>>
>> Dave D.
>>
> 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.
>
> 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.
>
> Jim A
>
>
>
>> On 6/25/20 4:52 AM, jksjdevelop wrote:
>>>
>>> Just recently added a slave backend to my system which works very well.
>>>
>>> Uses a Rasberry Pi to host a Hauppauge Dual HD USB tuner.
>>>
>>> Has anybody got a way to shut the slave down after the last 
>>> recording of the day?
>>>
>>> I use the Idle Screen <https://www.mythtv.org/wiki/Idle_Screen> 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.
>>>
>>> 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.
>>>
>>> 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.
>>>
>>>
>>>
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>>
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