[maemo-developers] N800 Power cycles

[From: Frantisek Dufka]

Eero Tamminen wrote:
> Hi,
>>> Is
>>> there a way (by changing linuxrc further) to get a lot more information
>>> during boot instead of the nice but almost informationfree image?
> 
> Using the text2screen utility above?
> 

Some additional tips are here http://talk.maemo.org/showthread.php?t=16056

With easy modification you may see which /etc/init.d/* scripts are 
started and syslog may help a lot too.
> 
>> I just noticed that I cannot write that file, the fs is mounted readonly:
>>
>> /dev/root on /mnt/initfs type jffs2 (ro)
>>
>> If I remount it rw
>>
>> mount -o remount,rw /mnt/initfs
>>
>> to do the change, would that break something?

No but it allows you (or some code running as root) to mess it up. 
initfs was more or less writable (i.e. mounted 'rw' but more or less 
full) since OS2005 days, changing mount options to 'ro' is new in Diablo.

Also mounting it 'rw' eats some tiny bits of memory by having extra 
jffs_gcd_mtd3 garbage collection kernel thread running.

> 
> Initfs may be too full for changes.  You need to remove things first
> (e.g. initfs factory test stuff you can "find -name '*test*'").
> 

It was full before Diablo. In Diablo initfs partition was enlarged so 
there is enough free space at least for N800 and plain N810. The wimax 
edition has some additional firmware and binaries so the free space may 
be bad again.