[maemo-developers] N800 Power cycles

[From: Frantisek Dufka]

Rainer Dorsch wrote:
> Under which circumstances is the N800 started automatically, when the power 
> supply is plugged in?
> 

N800 is always started when you plug it in. The difference is in unix 
runlevel the device boots into. Normal is runlevel 2 when maemo-desktop 
starts fully. When bootreason (/proc/bootreason) is 'charger' it boots 
into runlevel 5 with slightly different boot sequence which in final 
stage shows only charging icon but otherwise the system behind it is 
almost fully booted. So in theory you can have reboot loop which happens 
only in runlevel 5 and not in runlevel 2 if the failing part is specific 
to runlevel 5. Maybe you saw this?

More details is in /mnt/initfs/linuxrc in function enter_state(), normal 
mode is USER state, charging mode is (or is one case of?) ACTDEAD state. 
I hope I am not wrong about this.

Personally I don't like this behaviour so I am always powering device by 
power key and if I know battery is empty I have charger prepared and 
plug it in just after screen lights up to avoid this charging mode. 
There is short window of time to do this before dsme/bme starts and 
decides to shutdown the system due to low battery.

It would be interesting to modify linuxrc to go to runlevel 2 even in 
this charging state and see if it manages to boot normally.

Frantisek