Support and General Use > Hardware
Sansа Clip Zip - Improve battery life
g.orlandini:
--- Quote from: g.orlandini on June 02, 2015, 03:49:21 AM ---
--- Quote from: saratoga on June 01, 2015, 12:17:15 PM ---I quickly synced that file (was only one line changed). I can't login into gerrit at the moment, but here is the patch:
http://mit.edu/mgg6/www/amsv2_scaling_v8.patch
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Thanks a lot for your patch, Saratoga. Until now it works very well.
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After 3 weeks and many hours of use I can confirm the patch is working well, no freeze or errors. Sometimes it happens the cpu is boosted and it doesn't come back to power saving settings: in this case I shut down and resume playing with again the power setting on. This is the only (small) defect. Running time is very good, I didn't do a specific test but I'd say around 25-30 Hours.
Big thanks to Mihail, Saratoga and all other contributors to this useful patch
LolaPalocz:
--- Quote from: g.orlandini on June 25, 2015, 07:39:15 AM ---Sometimes it happens the cpu is boosted and it doesn't come back to power saving settings: in this case I shut down and resume playing with again the power setting on.
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How do you check for this ? I tried to check, and found out that whenever i reach Debug/CPU freqs, boost_counter is 1 then gets to zero (I have Mihail gui boost patch). I always get it back to zero, even after hours playing and clicking. Except if i hit some keys on this debug screen, and for each click, boost_counter increases and then hardly gets back to zero. So it's may be only a small bug on this screen's code.
I also got some quite amazing battery life (> 20 hours), and it's quite stable, except for this :
Sometimes (happens once every other hour), while playing (track end not yet reached) it gets back to main menu (like end of playlist reached) with "nothing to resume". There, if I try to click "Files" in the main menu, it does not show the files and gets back to the main menu after 1 second of black screen, like if there was no internal memory (or it losts its handle on the directory i was in - but I also witnessed it on internal memory only with no sd card in). BUT i can still browse it from other menus (like Manage Settings/Browse .cfg or Equalizer / Browse EQ presets).
I have to poweroff then on to see it back and select a track to play.
It began to happen at 20% battery level (after 2 weeks without charging when battery went from 100% to 20%), so i thought it was related to that. I charged it back to 100, but it them happened also at 80%.
It may be related to the warm weather here (hasnt yet cool down, so can't check if it really does not happen anymore when cool...)
So, I dont know if it's a hardware/storage condition (sensitive to the lower voltages we set?) or a real code bug. Any idea ?
Edit: happened again today while playing audio from sdcard, Files was stuck as it tried to go to some directory on the sd card, but I manage to get back to /, so it was just the SD card that somehow was unavailable.
Does any of the voltage and frequency settings this patch (or the irq patch) changes may have an influence on the SD card functionning ? If no, I may just get a new sd card.
LolaPalocz:
--- Quote from: LolaPalocz on July 17, 2015, 02:58:58 AM ---Does any of the voltage and frequency settings this patch (or the irq patch) changes may have an influence on the SD card functionning ? If no, I may just get a new sd card.
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Definitely a SD card problem. I replaced that old Kingston by an old Sandisk SD, and I haven't had any problem over a week.
Mihail Zenkov:
--- Quote from: LolaPalocz on July 27, 2015, 05:43:04 AM ---
--- Quote from: LolaPalocz on July 17, 2015, 02:58:58 AM ---Does any of the voltage and frequency settings this patch (or the irq patch) changes may have an influence on the SD card functionning ? If no, I may just get a new sd card.
--- End quote ---
Definitely a SD card problem. I replaced that old Kingston by an old Sandisk SD, and I haven't had any problem over a week.
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Can you replace ascodec_write_pmu(0x17, 2, 0x80 | 111); with ascodec_write_pmu(0x17, 2, 0x80 | 113); in amsv2_scaling_v8.patch and test Kingston sd card again?
LolaPalocz:
--- Quote from: Mihail Zenkov on July 28, 2015, 04:38:01 AM ---Can you replace ascodec_write_pmu(0x17, 2, 0x80 | 111); with ascodec_write_pmu(0x17, 2, 0x80 | 113); in amsv2_scaling_v8.patch and test Kingston sd card again?
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I did that, and I haven't had any problem the last 3 days. Thanks.
I'll have to wait for the next heat wave to confirm, as with 111, it was fine for some weeks till the weather got warm (dunno if temperature does have some effects on all that, but it looks like it did).
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