reinob | # 31 | 2012-11-15, 20:04 | Report

Well, it's all up there on post#25. If you (or anyone) have a N900 with a proper microUSB port (in case something happens) you are all welcome to try what I've posted above and report the results here.

Re. low-power state.. this is the ACTDEAD mode in the N900. When you turn it off and there's an active pending alarm and/or the charger is connected, it will not really shutdown but go into this low-power mode. That's why alarms work when the unit is "off" (although perhaps the hardware allows also waking up from real off state..)

In theory the transition ACTDEAD -> USER mode should be faster than from OFF -> USER.

But really, the N900 boots so fast that the original goal of this thread seems to be now that of removing the dots [ which have an entirely negligible effect on boot time ]

sixwheeledbeast | # 32 | 2012-11-15, 23:48 | Report

IMO it eats so much battery booting up, I avoid switching off full stop.

mr_pingu | # 33 | 2012-11-15, 23:53 | Report

Are you sure? I always believed boots made the battery drop like insane but I more and more start to believe BME does some crappy calibration/recalculation after boot. I have seen growing my battery percentage in 10 mins after boot...

sixwheeledbeast | # 34 | 2012-11-16, 00:02 | Report

CPU at near full whack for 2 minutes (~200mA) or so compared with ~20mA standby current.

mr_pingu | # 35 | 2012-11-16, 00:06 | Report

Would love to see some documentation on what can be removed.

Meanwhile in my head: Making a script that contains all removable *safe* packages. User can thick which one needs to be deleted (zenity, anyone :P)


What happens when battery have been out? It just skips that screen and you can set the time later or do we get an semi-bricked device?

vi_ | # 36 | 2012-11-16, 08:48 | Report

Mr pingu is correct, there is not actually THAT much power drain from booting, it is just BME giving wack values.

The lowest power state you can leave your n900 in that is not 'off' is offline mode.

In offline mode I have 3-4mA power drain, with my 1500mAh battery that is around 15.5 days(!) standby. Actdead mode is pointless (unless you have some heavy background stuff that runs all the time).

peterleinchen | # 37 | 2012-11-16, 08:53 | Report

But sixwheeledbeasts comment has a point, too.

Indeed, it is not that much.

reinob | # 38 | 2012-11-16, 09:19 | Report

With 20mA standby (or average), your battery would last around 65 hours (almost 3 days).

If booting takes 2 minutes @ 200mA, it's using all of ~7mAh, which is 0.5% of your battery capacity, thus reducing your time-between-charges by a whole of.. wait for it.. 20min

How often do you reboot anyway?

reinob | # 39 | 2012-11-16, 09:30 | Report

It will come some day. I will start by seeing which standard packages are not present anymore in my dev-N900.

[ Note: to make things easier and faster, if ANYONE happens to flash his or her N900 completely, I would appreciate it if the first thing he or she does would be to send me the output of "dpkg -l". I can obviously extract the list of packages from a fiasco image, but the less effort it takes, the better.. ]

Nice idea. A console-GUI application allowing the user to tick boxes to remove suggested packages and perform suggested modifications and/or tweaks, such as:

"remove bme from system"
"eliminate actdead mode"
"create a runlevel for booting to shell"
"..."

Nothing. Your date and time is simply wrong. ntpdate to the rescue

peterleinchen | # 40 | 2012-11-16, 09:32 | Report

According to your calculation, we could roughly boot up to 200 times with one charge!? I doubt it, but am also not going to test

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Last edited by peterleinchen; 2012-11-16 at 09:34.