Hi all,
After using my Arc with ICS 4.1.B.0.431 firmware without major problems for some time, I decided to upgrade to ICS 4.1.B.0.587. I have been using this firmware for a month now. In the last 14 days or so I started to observe that after some days of normal battery life (when I have to charge the phone once per 2-3 days), the phone starts to drain the battery faster in stand-by mode, so that it almost discharges it over the night or so.
Here are some screenshots of such a situation:
Here's the zoom-in:
...as you see, there was no activity in the most part of the 19h period.
The two top battery consumers as per the graph are:
... the display was active for 50 mins only.
And:
... the cell stand-by had a full 100% signal time, so no excessive radio usage should have occured.
The interesting part is the "Show CPU usage" Developer option that I have turned on for these screen-shots and shows a constant load of 8 (If I understand the display correctly). Constant load of 8? That's prety high I think (even heavy loaded servers rarely have such a high constant load).
In spite of high reported load, another tool ("top" utility from the ConnectBot) does not show the load neither any processes consuming CPU time:
... the only process shown by top to be consuming CPU is SSHDroid that has just been started and used to transfer the screen-shots to my computer.
When I reboot the phone after above happens, the "Show CPU Usage" Debug load-meter drops (well, It's hard to get 0 load when actually using the phone to get a screen-shot - the long-term-average load is still up since this is just after reboot and there's a lot of CPU activity during boot-up, but the mid-term-average and short-term-average are already showing decreased CPU activity):
Has anyone experienced such behaviour on the Xperia ARC / ICS 4.1.B.0.587 ?
Regards, Peter