Rockbox General > Rockbox General Discussion

Decrease in battery life after installing 3.11

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saratoga:
I did a battery bench, comparing 3.11 to an older bench I did 18 months ago:

3.11: 09:41:52
r28624-101120:  14:22:20

So battery life is about 5 hours worse.  Figuring out which commit did it is left up as an exercise to the reader.

bertrik:
hm, that's quite a bit indeed ... :|
About 16 mA assuming a 550 mAh battery.

Just an idea, perhaps the fm tuner somehow stays enabled.
Something was recently changed in tuner power control.

Do you see a difference in the fm radio debug menu right after boot without explicitly disabling the fm tuner, and when the fm radio is explicitly enabled/disabled?

saratoga:

--- Quote from: bertrik on April 08, 2012, 04:50:12 PM ---Do you see a difference in the fm radio debug menu right after boot without explicitly disabling the fm tuner, and when the fm radio is explicitly enabled/disabled?

--- End quote ---

By "disable" do you mean long press the play button the FM screen to leave it?  If I do that, the registers do not reset back to the original state:

Original: https://plus.google.com/u/0/112705301073457671666/posts
Quit FM playback:  https://plus.google.com/u/0/112705301073457671666/posts

Is it worth trying a battery bench with the FM radio disabled (undef  CONFIG_TUNER SI4700)?

saratoga:
I'll try bisecting a little tonight.  First I'll confirm that the Feb 13 build works, then I guess binary search from there.  If anyone else feels like helping, it'll speed this up if they could test 3.10. 

saratoga:
2dc891b-120213:  14:41

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