Support and General Use > Hardware
Sansа Clip Zip - Improve battery life
Mihail Zenkov:
Yes, for testing stability frequency scaling better use APE - in this case CPU switch to boost and back to normal each second.
saratoga:
http://mit.edu/mgg6/www/rockbox-clipzip.zip
http://mit.edu/mgg6/www/rockbox-clip+.zip
If anyone wants to try the above patch (I enabled it for the clip+ as well). Tested and working on my devices, but I'm curious if they're good for everyone else.
saratoga:
--- Quote from: saratoga on September 29, 2014, 01:38:52 PM ---I tested battery life on some builds:
Last spring: 10h 14min
Current git: 13h 35min
Current git + 1.1v CPU (no change to other clocks): 15h 0min
--- End quote ---
Testing the frequency scaling patch on the Zip gave me 12h 45min, which is less than I would expect. I will retest to be sure that nothing went wrong. Have you done a battery test?
On the other hand, frequency scaling seems stable. I put probably 36 hours on a pair of AMSv2 devices with zero crashes.
Mihail Zenkov:
--- Quote from: saratoga on December 07, 2014, 03:03:28 PM ---I tested battery life on some builds:
Last spring: 10h 14min
Current git: 13h 35min
Current git + 1.1v CPU (no change to other clocks): 15h 0min
Testing the frequency scaling patch on the Zip gave me 12h 45min, which is less than I would expect. I will retest to be sure that nothing went wrong.
--- End quote ---
Probably you force boost mode. Check frequency.
--- Quote ---Have you done a battery test?
--- End quote ---
No. But I measure power consumption. Subjectively player work two times longer. Not sure if it have sense - in system menu I have top ruining time 23h 11m.
--- Quote ---On the other hand, frequency scaling seems stable. I put probably 36 hours on a pair of AMSv2 devices with zero crashes.
--- End quote ---
Good!
EDIT: Have you added cpu_boost(0) to usb-as3525.c?
saratoga:
I started a new test, and this time confirmed after 30 minutes that the system was not stuck in a boosted state. Will report the results in the morning.
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