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knoxy420 is offline knoxy420
2012-05-03 , 03:50
Posts: 23 | Thanked: 3 times | Joined on Sep 2011 @ NH, USA
#1
This is freaking me out!

My N900 used to have terrible battery life. 3-4 hours max. really crappy. I talk all about it in this thread

Suddenly, yesterday I noticed it had gone ~8 hours and still had juice. Today, 14 hours after I took it off the charger, it still reports 35% battery. This is after 9 months of crappy battery life.

WhhaawwtThaFaaarrk? 400% increase?!?

Why is this? I'm afraid to reboot it else the magic will escape!

Anyone care to speculate on this? I'm really interested in folks ideas on this.

Here's some stats & observation.:
  • Last updates I ran were over a month ago.
  • Been running overclocked at 250-850MHz.
  • All hardware is turned on.
  • all repos enabled
  • Not running much; wifi, ssh, X. CPU is at <10%.
  • Same standard BL-5j battery for months.
  • Other than battery life, it has run perfectly.
  • it used to run very warm to the touch, always.
  • now it stays cool to the touch

I started poking around and found lots of this in the syslog:
Code:
[39710.458679] bq27x00-battery 2-0055: battery is not calibrated! ignoring capacity values
[39715.800842] bq27x00-battery 2-0055: battery is not calibrated! ignoring capacity values
[39720.871185] bq27x00-battery 2-0055: battery is not calibrated! ignoring capacity values

And for comparison (see my other thread), here's typical top output:
Code:
Mem: 142680K used, 92580K free, 0K shrd, 396K buff, 28824K cached
CPU:  2.4% usr  5.7% sys  0.0% nic 91.3% idle  0.0% io  0.0% irq  0.3% sirq
Load average: 0.03 0.09 0.09 1/298 20788
  PID  PPID USER     STAT   RSS %MEM %CPU COMMAND
20347 17426 root     R      728  0.3  1.7 top
30369 30360 user     S      672  0.2  1.7 top
   10     2 root     SW       0  0.0  1.5 [omap2_mcspi]
13687 13659 root     S      696  0.3  1.1 top
  948     1 root     S     6888  2.9  0.5 /usr/sbin/ohmd --no-daemon
17228 17181 root     S     1840  0.7  0.5 {sshd} sshd: root@pts/4
here's what powertop says:
Code:
[1|root@Nokia-N900|~]powertop
Powertop 1.13.3
status: Unknown job: pmtrackerdaemon
Sleeping for 11 seconds before sampling
Collecting data for 30 seconds
Sample interval was 00m 30s 33264us

C#      | Ratio  | Avg/dura | Frequency | Ratio
--------+--------+----------+-----------+--------+
     C0 |   4.2% |          |  1150 MHz |   nan% |
     C1 |   0.0% |    0.5ms | 
     C2 |   1.0% |    3.3ms | 
     C3 |   8.6% |  199.6ms | 
     C4 |  86.1% | 1521.0ms | 

IRQ#    | Activity   | Type           | Name
--------+------------+----------------+---------------------------
     37 |        239 |           INTC | gp
     57 |        234 |           INTC | i2c_omap
     11 |        109 |           INTC | prcm
     56 |         90 |           INTC | i2c_omap
     12 |         80 |           INTC | DMA
    202 |          5 |           GPIO | wl1251

PID#    | Activity   | Name           | Function Entry (Expire)
--------+------------+----------------+---------------------------
      0 |          8 |  <kernel core> | tick_nohz_restart_sched_tick (tick_sched_timer)
  18954 |          3D|  kernel-config | cpufreq_governor_dbs (delayed_work_timer_fn)
    693 |          1 |           dsme | __enqueue_rt_entity (sched_rt_period_timer)
    552 |          1 |         wl12xx | queue_delayed_work (delayed_work_timer_fn)
      0 |          1 |  <kernel core> | hrtimer_start (tick_sched_timer)
    977 |          1 |            mce | tsc2005_start_scan (tsc2005_esd_timer_handler)
  20072 |          1 |       powertop | do_nanosleep (hrtimer_wakeup)

Power domain activity breakdown
Domain  | % of time spent in states
--------+---------+---------+---------+---------+----------
usbhost |OFF: 100%|RET:   0%|INA:   0%| ON:   0%| now:(OFF)
    sgx |OFF: 100%|RET:   0%|INA:   0%| ON:   0%| now:(OFF)
    per |OFF:  94%|RET:   0%|INA:   0%| ON:   4%| now:(ON)
    dss |OFF: 100%|RET:   0%|INA:   0%| ON:   0%| now:(OFF)
    cam |OFF: 100%|RET:   0%|INA:   0%| ON:   0%| now:(OFF)
   core |OFF:  86%|RET:   8%|INA:   0%| ON:   4%| now:(ON)
   neon |OFF:  86%|RET:   8%|INA:   0%| ON:   4%| now:(ON)
    mpu |OFF:  86%|RET:   8%|INA:   0%| ON:   4%| now:(ON)
   iva2 |OFF: 100%|RET:   0%|INA:   0%| ON:   0%| now:(OFF)

Clock activity breakdown at end of period
Domain  | Active clocks
--------+---------------+---------------+------------------
   core |          SDRC | HSOTGUSB_IDLE |      OMAPCTRL 
        |     MAILBOXES |
   wkup |          GPT1 |       32KSYNC |         GPIO1 
        |          WDT1 |           SR1 |           SR2 
        |
  ckgen |          CORE |          PERI |           96M 
        |           48M |           12M |           54M 
        |      EMU_CORE |
    per |         GPIO2 |         GPIO3 |         GPIO4 
        |         GPIO5 |         GPIO6 |

Total wakeups   773,  25.8/s | IRQ  757,  25.2/s | Timers   16,   0.5/s
HW wakeups      109,   3.6/s |     Real gp_timers expired  239,   8.0/s

Here's lshal for the battery:
Code:
[1|root@Nokia-N900|~]lshal -s -u '/org/freedesktop/Hal/devices/computer_power_supply_battery_bq27200_0'
udi = '/org/freedesktop/Hal/devices/computer_power_supply_battery_bq27200_0'
  battery.charge_level.current = 0  (0x0)  (int)
  battery.charge_level.design = 2056  (0x808)  (int)
  battery.charge_level.last_full = 0  (0x0)  (int)
  battery.charge_level.percentage = 0  (0x0)  (int)
  battery.charge_level.rate = 117  (0x75)  (int)
  battery.is_rechargeable = true  (bool)
  battery.present = true  (bool)
  battery.rechargeable.is_charging = false  (bool)
  battery.rechargeable.is_discharging = true  (bool)
  battery.reporting.current = 1637  (0x665)  (int)
  battery.reporting.design = 2056  (0x808)  (int)
  battery.reporting.rate = 117  (0x75)  (int)
  battery.reporting.technology = 'Li-ion'  (string)
  battery.reporting.unit = 'mAh'  (string)
  battery.technology = 'lithium-ion'  (string)
  battery.type = 'primary'  (string)
  battery.voltage.current = 3593  (0xe09)  (int)
  info.capabilities = {'battery'} (string list)
  info.category = 'battery'  (string)
  info.parent = '/org/freedesktop/Hal/devices/computer'  (string)
  info.product = 'Generic Battery Device'  (string)
  info.subsystem = 'power_supply'  (string)
  info.udi = '/org/freedesktop/Hal/devices/computer_power_supply_battery_bq27200_0'  (string)
  linux.hotplug_type = 2  (0x2)  (int)
  linux.subsystem = 'power_supply'  (string)
  linux.sysfs_path = '/sys/class/power_supply/bq27200-0'  (string)

what do you think is going on with this? lemme know if you'd like any other info.
 
geneven is offline geneven
2012-05-03 , 04:08
Posts: 5,795 | Thanked: 3,151 times | Joined on Feb 2007 @ Agoura Hills Calif
#2
There are many possible causes of crappy battery life that might invisibly go away, and they are discussed in the many battery life threads. One of my favorites is the cell phone switching from one type of signal to another.
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immi.shk is offline immi.shk
2012-05-03 , 04:42
Posts: 432 | Thanked: 544 times | Joined on Feb 2011
#3
i have similar experience with NITdroid...

more then 5hrs of On-screen(continual use till battery cry for recharge) time and 4hrs on wifi hotspot... more then 15hrs on normal use...
and it was cold too as you mentioned

the reason i felt for it was 'heapsize' which was not set by me so it ws '20m' only & no swap...

after changing both of them i.e heapsize to '36m' & enabling swap.. NITDROID BECAME A MAMMAL i.e always hot & hungry
this is what i observed, it might be wrong

so is there a similar concept of heapsize in maemo too
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Last edited by immi.shk; 2012-05-03 at 04:47.
 
reinob is offline reinob
2012-05-03 , 08:40
Posts: 1,797 | Thanked: 4,223 times | Joined on Feb 2011 @ Germany
#4
@knoxy420,

What kernel are you using?
Are you loading the bq27x00_battery module?

Can you remember if you did anything in these last days that might have affected the kernel?
Last edited by reinob; 2012-05-03 at 14:42.
 

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ffha is offline ffha
2012-05-03 , 09:55
Posts: 131 | Thanked: 170 times | Joined on May 2010 @ Netherlands
#5
Every BL-5J has a chip inside which keeps track of the amount of charge a battery can hold. It seems like yours was off by a large amount or simply defect.

You can re-calibrate it yourself or purchase a new battery if the one you're currently using does turn out to be defect.
http://talk.maemo.org/showpost.php?p...&postcount=846
http://talk.maemo.org/showpost.php?p...postcount=1176
 

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sicelo is offline sicelo
2012-05-03 , 10:32
Community Council | Posts: 650 | Thanked: 1,183 times | Joined on Sep 2010 @ Mbabane
#6
you're aware that the speed patch is generally not considered good?
 
reinob is offline reinob
2012-05-03 , 11:41
Posts: 1,797 | Thanked: 4,223 times | Joined on Feb 2011 @ Germany
#7
Originally Posted by qhubekela View Post
you're aware that the speed patch is generally not considered good?
This has nothing to do with speedpatch (hopefully!) as his battery was even draining while the phone was off (probably ACTDEAD anyway..)
 

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knoxy420 is offline knoxy420
2012-05-03 , 12:33
Posts: 23 | Thanked: 3 times | Joined on Sep 2011 @ NH, USA
#8
Originally Posted by reinob View Post
@knoxy420,

What kernel are you using?
Are you loading the bq27x00_battery module?

Can you remember if you did anything in these last days that might have affacted the kernel?
Running kernel:
Code:
Linux Nokia-N900 2.6.28.10-power50 #1 PREEMPT Sun Mar 18 20:10:56 EET 2012 armv7l GNU/Linux
bq27x00 is loaded:

Code:
[1|root@Nokia-N900|~]lsmod
Module                  Size  Used by
bq27x00_battery         6480  0 
power_supply            6916  1 bq27x00_battery
I haven't done any updates/hacking on the phone in over a month.

One day it would die quickly. Now it lasts all day.
 

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knoxy420 is offline knoxy420
2012-05-03 , 12:37
Posts: 23 | Thanked: 3 times | Joined on Sep 2011 @ NH, USA
#9
Originally Posted by ffha View Post
Every BL-5J has a chip inside which keeps track of the amount of charge a battery can hold. It seems like yours was off by a large amount or simply defect.

You can re-calibrate it yourself or purchase a new battery if the one you're currently using does turn out to be defect.
http://talk.maemo.org/showpost.php?p...&postcount=846
http://talk.maemo.org/showpost.php?p...postcount=1176
I have 2 bl5js. Both exhibited the poor battery life. I haven't tried my spare since this one got "better". Given the junk about battery calibration in syslog, I'd say something changed.
 
knoxy420 is offline knoxy420
2012-05-03 , 12:41
Posts: 23 | Thanked: 3 times | Joined on Sep 2011 @ NH, USA
#10
Originally Posted by reinob View Post
This has nothing to do with speedpatch (hopefully!) as his battery was even draining while the phone was off (probably ACTDEAD anyway..)
I do have speed patch & battery patch installed from back when I didn't know any better. However the battery life issues were the same with a clean reflash.

Whatever was eating batteries was generating a large amount of heat so that the phone was always noticibly warm. I figured there was a short somewhere or something.
 
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