Re: Odd ACPI/Battery Behavior
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Leo L. Schwab wrote:
> I have a Sony Vaio VGN-S150 laptop that has been displaying odd
> behavior in reporting available battery power. While left charging, the
> system sometimes reports low or no energy remaining in the battery until
> it's fully charged, then reports 100%.
>
> Today I had occasion to run the battery to zero. I then plugged in
> the AC adapter and freshly cold-booted the machine. The ACPI meter
> persistently reported zero percent power available for well over an hour
> before it finally jumped to 100%, after the battery was fully charged.
>
> It seems to indulge in this strange behavior when the battery is
> drained to about 30% or lower. Here's a copy of an 'acpitool' report while
> it was "empty" but charging:
>
> ----
> ewhac@walkies:~$ acpitool -e
> Kernel version : 2.6.17 - ACPI version : 20060127
> -----------------------------------------------------------
> Battery #1 : present
> Remaining capacity : 0 mWh, 0.00%, 05:34:55
> Design capacity : 53280 mWh
> Last full capacity : 41580 mWh, 78.0% of design capacity
> Capacity loss : 22.0%
> Present rate : 7449 mW
> Charging state : charging
> Battery type : non-recharge, LION
>
> AC adapter : on-line
> Fan : <not available>
>
> CPU type : Intel(R) Pentium(R) M processor 1.60GHz
> CPU speed : 600.000 MHz
> Cache size : 2048 KB
> Bogomips : 1198.35
> Processor ID : 0
> Bus mastering control : yes
> Power management : yes
> Throttling control : yes
> Limit interface : yes
> Active C-state : C2
> C-states (incl. C0) : 3
> Usage of state C1 : 10 (0.0 %)
> Usage of state C2 : 3216278 (100.0 %)
> T-state count : 8
> Active T-state : T0
>
> Thermal zone 1 : ok, 42 C
> Trip points :
> -------------
> critical (S5): 100 C
> passive: 90 C: tc1=1 tc2=2 tsp=50 devices=0xc1479620
>
>
> Device Sleep state Status
> ---------------------------------------
> 1. PWRB 4 * enabled
> 2. PCIB 3 disabled
> 3. LANC 3 disabled
> 4. EC0 5 disabled
> 5. USB0 3 disabled
> 6. USB1 3 disabled
> 7. USB2 3 disabled
> 8. USB7 3 disabled
> 9. MODM 3 disabled
> ----
>
> I'd replace the battery, but the prices for Sony-branded batteries
> are particularly usurious (and, with even OEM batteries exploding left and
> right, I'm not at all interested in going aftermarket).
>
> Has anyone seen anything like this before?
>
> Schwab
>
>
Greetings Leo:
The ACPI system just reports back what the battery is telling it. All
of the information in your Battery #1 category is straight from the
cell. With a 22% capacity loss, you're probably looking at a new
battery sooner than later anyway.
- -Scott
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