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Experiments on power consumption (iPOD 5G, 30G)

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Buschel:
Hello, after some discussion yesterday I tried to use the spirit of patch #7036 (Sansa E200, ATA/LCD off) for lowering power consumption of te iPOD 5G. I tested 2 things first: Disabling (imho) unused devices of PP502x (OPTO, ATA, PIEZO, FIREWIRE) for whole runtime and disabling IDE0 if disk is not used (HAVE_ATA_POWEROFF-define).
Result ist -> no effect at all.
Does anyone know, if the registers defined in PP0520.h (DEV_EN, DEV_RS etc.) and the bitmasks (DEV_OPTO, DEV_IDE0 etc.) work?

Next try will be the "LCD-off"-stuff. I am not quite sure the defined bitmask will have effect...

Buschel:
Also no results on LCD-stuff. Seems like the defines / addresses / bitmasks which are contained in PP5020.h do not match the iPOD-reality  :-\

saratoga:
Have you found anything?  If not, I suggest logging onto IRC sometime when Europeans are likely to be awake, and asking there.  That or the mailing list are often a better way to get answers to development questions, since the forums are largely support.

patwa:
Hi, just saw this topic and wanted to post my benchmark for the 30GB Video.  I'm getting about 20 mins of playing time for 10% battery usage, so that's 200 minutes on average for a full battery.

this is playing at max volume, max bass and treble, hardware and software equalizer set, crossfade and crossfeed, replay gain, etc.  I can post my settings file later if it helps.

Given that the normal iPod is supposed to last 5/6? hours, 3 hours 10 mins isn't that bad when you consider the superior sound quality (and features), but I wonder if the power consumption issue was improve on the 80GB port?  Even if it wasn't, taking the same ratio one should still expect 9/10 hours from it.

Interesting throughts about disabling processes and hardware functions, I wonder if it's possible to disable the LCD altogether? I know this won't suit most people, but I use the speech only so don't really need it. How much would this add to the battery life?

H.

Llorean:
Basing it on 10% use in 20 minutes is a bad assumption. Run a full battery bench, as that 10% isn't strictly reliable.

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