Openmoko Bug #1158: Charging stops even while connected

Openmoko Public Trac bugs at docs.openmoko.org
Tue Dec 16 19:24:13 CET 2008


#1158: Charging stops even while connected
---------------------------------+------------------------------------------
    Reporter:  plr@…             |        Owner:  openmoko-devel
        Type:  defect            |       Status:  reopened      
    Priority:  high              |    Milestone:  Om2008.10     
   Component:  System Software   |      Version:  unspecified   
    Severity:  blocker           |   Resolution:                
    Keywords:  power management  |     Haspatch:  0             
   Blockedby:                    |    Estimated:                
 Patchreview:                    |     Blocking:                
Reproducible:  sometimes         |  
---------------------------------+------------------------------------------

Comment(by balajirrao):

 Replying to [comment:35 lindi]:
 > Please reopen this, I do not seem to have permissions to do it.
 >
 > I can see this again with andy-tracking de473ca893c9285a.
 > {{{
 > 2008-12-16T14:33:44+0200 1229430824 Battery Discharging 4160000 0
 1003348 296 Li-ion 1 3932100 3932100 100 0 0.37
 > 2008-12-16T14:35:45+0200 1229430945 Battery Discharging 4160000 0
 1003348 296 Li-ion 1 3932100 3932100 100 0 0.24
 > 2008-12-16T14:37:46+0200 1229431066 Battery Discharging 4160000 0
 1003348 293 Li-ion 1 3932100 3932100 100 0 0.18

 Battery full till here..

 > 2008-12-16T14:39:47+0200 1229431187 Battery Discharging 4144000 31875
 1003348 296 Li-ion 1 118980 3932100 100 0 0.16

 Actual discharging begins here. currrent=31mA implies that that sys
 current requirement is more than what usb can provide and the rest is
 pulled in from the battery. So the total current pulled by the system is
 531 mA ?? Or somehow < 500 mA flowing in from the USB ?

 > 2008-12-16T14:41:48+0200 1229431308 Battery Discharging 4155000 20062
 1003348 296 Li-ion 1 188820 3932100 100 0 0.18
 > 2008-12-16T14:43:49+0200 1229431429 Battery Discharging 4152000 12000
 1003348 296 Li-ion 1 120060 3932100 100 0 0.12
 > 2008-12-16T14:45:50+0200 1229431550 Battery Discharging 4152000 21562
 1003348 296 Li-ion 1 175200 3932100 100 0 0.15
 > 2008-12-16T14:47:51+0200 1229431671 Battery Discharging 4150000 29437
 1003348 296 Li-ion 1 128220 3932100 99 0 0.12
 > 2008-12-16T14:49:52+0200 1229431792 Battery Discharging 4121000 196875
 1003348 306 Li-ion 1 19080 3932100 99 0 0.14

 Why does the current go up suddenly here ?? And the values are
 fluctuating.. Some problem with host not providing agreed current ?

 > 2008-12-16T14:51:53+0200 1229431913 Battery Discharging 4144000 13500
 1003348 301 Li-ion 1 278100 3932100 99 0 0.13
 > 2008-12-16T14:53:54+0200 1229432034 Battery Discharging 4147000 10500
 1003348 301 Li-ion 1 357360 3932100 99 0 0.11
 > 2008-12-16T14:55:55+0200 1229432156 Battery Discharging 4144000 27937
 1003348 301 Li-ion 1 134160 3932100 99 0 0.07
 > 2008-12-16T14:57:57+0200 1229432277 Battery Discharging 4144000 31875
 1003348 301 Li-ion 1 117480 3932100 99 0 0.04
 > 2008-12-16T14:59:58+0200 1229432398 Battery Discharging 4142000 20062
 1003348 298 Li-ion 1 186480 3932100 99 0 0.02
 > 2008-12-16T15:01:59+0200 1229432519 Battery Discharging 4144000 10687
 1003348 298 Li-ion 1 349920 3932100 99 0 0.08
 > 2008-12-16T15:04:00+0200 1229432640 Battery Discharging 4137000 10312
 1003348 298 Li-ion 1 362340 3932100 98 0 0.06
 > 2008-12-16T15:06:01+0200 1229432761 Battery Discharging 4142000 31687
 1003348 298 Li-ion 1 117780 3932100 98 0 0.05
 > 2008-12-16T15:08:02+0200 1229432882 Battery Discharging 4139000 31500
 1003348 298 Li-ion 1 118440 3932100 98 0 0.04
 > 2008-12-16T15:10:03+0200 1229433003 Battery Discharging 4118000 189000
 1003348 301 Li-ion 1 19680 3932100 98 0 0.02
 > 2008-12-16T15:12:04+0200 1229433124 Battery Discharging 4113000 197062
 1003348 308 Li-ion 1 19080 3932100 98 0 0.03
 > 2008-12-16T15:14:05+0200 1229433245 Battery Discharging 4108000 200625
 1003348 311 Li-ion 1 18360 3932100 97 0 0.09

 Hmmm.. Occasional raise in current.. Weird..
 > 2008-12-16T15:16:06+0200 1229433366 Battery Discharging 4126000 48562
 1003348 306 Li-ion 1 75720 3932100 97 0 0.09
 > }}}
 > It starts to charge again if I unplug and replug the USB cable.

 OK, let me try to reproduce the problem..

 Can you please try with an ac adapter and see if you can reproduce it ?

 Thanks!

-- 
Ticket URL: <https://docs.openmoko.org/trac/ticket/1158#comment:38>
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