[Q] Undervolting Nook HD+

[jnbhlr]

I tried undervolting my nook hd+, but no app worked so far, google/forum search revealed nothing of consequence.
They just leave out the "voltages" tab like described on the setcpu website.
Does anyone know a kernel for Nook HD+ that supports undervolting, or is there a possibility to change the fixed settings manually?

Using Kernel [email protected] #2 (2013-12-25)

Build Date 2013-12-25

I suppose building myself a new kernel could work - any clues to which options I need to change?

 

[felacio]

Undervolting is really trivial as the biggest power draw isn't the gpu st all, it's the big screen. You won't get much benefit except maybe heat.

Sent from my HTC One using Tapatalk

 

[jnbhlr]

Undervolting is really trivial as the biggest power draw isn't the gpu st all, it's the big screen. You won't get much benefit except maybe heat.

Heat equals wasted energy.

According to spec, the OMAP4470 requires around 2,6W. With a total Battery of 22,2Wh, that should matter.

Having a look in the statistics of android confirms:
Display 34% Power consumed
Game 40%
Judging from heat I would guess about 1W wasted in CPU/GPU during playing, which fits to the other numbers nicely.

So for me, there's something to win - how much remains to be seen, of course.

I want to use my nook in low-brightness environments, I've got to love reading ebooks on my phone with darkest setting and dark red font on black blackground - easy on the eye and let's the body settle down for sleep.

So, clues anyone? Do I have to look in the hardware/ti/omap4xxx directory or where do I look best, any clues how the setting might be named? Or does someone already have a suitable kernel?