I seem to have discovered an interesting bug in NaB00. I have screen blanking and touchscreen blocking set up to identical periods of 2 minutes, so that it immediately locks up when I hit the power off/enter key combo.

However, whenever I have played a video, the device seems to "forget" that setting and just dims the screen a little, without any blocking of the touchscreen at all. I need to open the file manager and wait for an "update" window to appear and go away before NaB00 remembers it's supposed to go to sleep immediately. Such behaviour does not bode well for the robustness of the (closed source!) power management in the N800.

This kinda blows. Anyone else seen this?

A bit OT, but this week there was a heated exchange on the maemo-dev list about this closed source power management thing.

A Nokia dev clearly stated that this was a myth, because there is only one place power management can work effectively, and that's in the kernel, so it's all there for everyone to see...

Go figure :-)

I don't know if this is related - - -

Got my N800 yesterday. First thing I did was leave it OFF and charged it. The screen came on, then went black with a "Charging" and an icon. A few hours later the screen changed to "Charged". There was always a message on the screen.

I then followed your advice and set the two parameters each to "2 minutes".

Used it, played with it, had LOTS of fun with it!

When it came time to charge it again I first turned it OFF and plugged in the charger. Got a black screen with "Charging" and the icon.

BUT about 90 seconds later the screen went totally black (off) and no more messages and no more icons! There was NO WAY to tell when it had finished charging!

Is this releated to your problem Karel?

Another note/question on charging the N800:

In the on-line .pdf "Nokia N800 User Guide" in the section 'Battery information - Charging and discharging' it says:

"Unplug the charger ... when not in use. Do not leave a fully charged battery connected to a charger, since overcharging may shorten its lifetime."

I had, apparently mistakenly, thought all modern electronic units had overcharging protection built in.

Does this mean I can not charge my N800 overnight and get up in the morning some 8 hours later and unplug it?

With my Palm Tungsten T3 I just put it in the cradle every evening and take it out in the morning without seemingly harming the battery.
.

This _must_ be wrong. Nokia is known to leave old rubbish in their manuals, stuff that was correct when they used NiCd and NiMH batteries. It's impossible (in the sense that the device cannot be allowed to do so) to overcharge lithium batteries, because a) there is overcharge protection inside the battery itself, and b) there's also overcharge protection circuitry in the device itself. There's none in the charger, its job is simply to provide steady, regulated 5V DC. As correct charging of lithium batteries is absolutely critical (they explode if overcharged!) the device itself must have protection circuitry installed. And because it's literally lethally dangerous to overcharge, there is second-level protection in the battery itself.

If lithium batteries are used, they must have.

I charge it overnight.

So do I (with my two T3s - batteries good as new, apparently, after 2-3 years - I replaced the oldest battery with a newer, larger capacity one 2 years ago)
The Tungsten T3 stops charging when the battery reaches exactly 4.24 volts. Some other devices choose to stop charging at a slightly lower voltage, e.g. 4.10 volts, which _will_ prolong lifetime a bit, but you lose a fair amount of battery time that way. The Tungsten T3 switches off when down to 3.79 volts (nominally, but it can be changed by 3-party software), which, compared to some phones that go all the way down to 3.2 volts, leaves about 40% "unused" capacity - that's probably why it charges it as high as 4.24V, which is about as much as can be allowed.
I don't know what the N800 charges to, but no doubt someone will find out.

As always when battery issues come up I refer to http://batteryuniversity.com/ for some good info on lithium (and other) batteries.

What TA-t3 said...

And you should be able to see how far the charging process is by pushing the power button. The screen should come up with the charging icon updated (animation when charging and steady when full).

At least, mine does.

Sofar...