Re: N900 battery life questions, issues, scenarios
 

kernel-power-settings != kernel-power

You may keep kernel-power and get rid of kernel-power-settings. Indeed, this may be the cause of very rare (and untracked, yet) bug, that only few people experienced. Anyway, you can do everything that kernel-power-setting does yourself, without actually using KPS.

/Estel

Re: N900 battery life questions, issues, scenarios
 

right, how to remove kernel-power-settings? or maybe simplier to update to kp v53? according to Alecsandru post it seems that readings are far better than mine.

Re: N900 battery life questions, issues, scenarios
 

Thanks Estel - I had missed that the reference was to the kp-settings and not kp itself.

Updating to kp53 likely will not help as kernel-power-settings may be essentially the same ie. still carry the bug.

You can remove kernel-power-settings v0.17 normally, as it will not remove kp52. And I believe I was also correct in noting that if you installed cssu-testing, you would have the modules required for usbmode and (?) aircrack, without needing a power kernel.

Re: N900 battery life questions, issues, scenarios
 

maybe he can try a custom profile for kernel config , taking the default one and lowering voltages?

Re: N900 battery life questions, issues, scenarios
 

So, as you suggested, I have deleted kernel-power-settings but probably it did not made major changes.
after few restarts powertop gave me same result as before

C# | Ratio | Avg/dura | Frequency | Ratio
--------+--------+----------+-----------+--------+
C0 | 17.9% | | 1150 MHz | nan% |
C1 | 0.5% | 2.5ms |
C2 | 4.1% | 4.5ms |
C3 | 18.4% | 147.1ms |
C4 | 61.2% | 612.0ms |
I think my next step will be uninstallation of the kp or reflashing.

Re: N900 battery life questions, issues, scenarios
 

Remember to use the correct procedure for that uninstall :)

A reflash may be best - reflash -> powertop confirmation all's OK -> CSSU testing (or thumb) -> powertop confirmation -> usbmode.

What I would do, clean slate etc..

Re: N900 battery life questions, issues, scenarios
 

What are all those "sleep" processes in your powertop output? Did you install some magic "patch" by chance?

could you pastebin the result of "maemo-list-user-packages"?

Re: N900 battery life questions, issues, scenarios
 

What is that misterious bug you're talking about that I am not aware of?

Re: N900 battery life questions, issues, scenarios
 

I believe Estel was conjecturing that there may be a bug given the current case and that of tanago starting here and culminating with this statement from tanago.

Thanks for chipping in here - I saw those sleep processes but don't know enuff to realise they were way wrong. However, installing some or other patch and not mentioning it on a troubleshooting thread would be unhelpful :-)

Re: N900 battery life questions, issues, scenarios
 

If <4hrs means 2 :-) I think it's a little lean on juice. Truly intensive what you describe for close to 4 hrs is perhaps reasonable. Thing is, a polarcell replacement is not that much, and hey, irritation of calibration aside, you will know how the other one stacks up.

Charging can take a couple of hours, not so? But not 4 hours with stock Nokia charger.