[mythtv] [mythtv-commits] Ticket #5754: Enhancement to make EIT Active Scanning end after a period, then restart later (a duty cycle)

[Michael T. Dean]

On 10/02/2008 05:36 PM, MythTV wrote:
> #5754: Enhancement to make EIT Active Scanning end after a period, then restart
> later (a duty cycle)
> ----------------------------------+-----------------------------------------
>  Reporter:  simonwalls            |        Owner:  stuarta   
>      Type:  enhancement           |       Status:  new       
>  Priority:  minor                 |    Milestone:  0.22      
> Component:  eit                   |      Version:  0.21-fixes
>  Severity:  medium                |   Resolution:            
>   Mlocked:  0                     |  
> ----------------------------------+-----------------------------------------
>
> Comment(by simonwalls):
>   
...
>  I have 2 Nova-T PCI cards, one was always in active scan. Idle power
>  consumed by the server reduced to 84Watts from 95Watts at the wall socket,
>  during the active scan's 'rest' period, using the improved patch I attach
>  today. That's about 8kWh or £1.00 saved per month, at current UK
>  electricty prices. It corresponds to about 8.5 Watts before PSU
>  inefficiencies. If both cards had been in active scan, I think the saving
>  would be greater.
>
>   

And, if doing as Janne suggested, you'd save another 84W (making 95W
total), which is about 61kWh or about £7.6 per month...  (OK, really,
you'd only save the 95W total when mythbackend was shut down, which
wouldn't be the entire month, but then again, if shutting down your
backend when it's not in use, you wouldn't save the 11W this patch may
save for the entire 720+ hours of the month...)

>  This improved patch might be more technically acceptable, but I note your
>  views, janne. Given that my backend is never shut down, I think the power
>  saving is worthwhile.
>   

Though, with mythshutdown, it could be (and could automatically wake)...

Mike (who's really just trying to tell you to check out mythshutdown and
possibly mythwelcome rather than critiquing your patch--especially if,
as you claim, power savings are important to you)