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:
----
[EMAIL PROTECTED]:~$ 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
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