How can i disable the lockscreen without an app?

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I want to disable the lockscreen.
There are several apps that do this but they all have a side-effect:
When they run pressing the volume-buttons will turn on the screen and i dont want that.
I know that CM-Roms have this feature built in but they have terrible battery-life.

Im using a Xperia Active with Spartan ROM (based on stock rom).

Any idea?

there are roms that give you an option to do this, either thru menu settings or via a pulldown toggle.

SGS2 (T989) on CM7_373R5

I know but the CM Roms all have **** battery-life.
Other then these i think the rest is stock-based and without that feature.

Originally Posted by schmolch

I know but the CM Roms all have **** battery-life.
Other then these i think the rest is stock-based and without that feature.

Really? I'm using cm7.1 and the battery is pretty good but I geuss its different for different phones.

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