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[Kernel] OC to 1100Mhz and linaro gcc 4.7 (New version with fast display mode)

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By guevor, Senior Member on 26th September 2012, 01:55 PM
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Because I suffer some problems in the vision, I bought a Nook Simple Touch to perform some of the functions performed with my asus transformer but with an electronic ink display. I must say I'm quite satisfied with its functionalty, but despite having to severely limit my hours in front of screens, I could not resist to modify the kernel.

The kernel adds frequencies of 1GHz and 1.1GHz, besides being modified to compile using gcc 4.7 from Linaro. I've also changed some compilation options.
The kernel includes the modifications for multitouch.

Attached the patch for the original source code 1.1 and my build.
Don't forget to rename the uImage.img to uImage (renamed it to allow the uploading)

Since version 2, the kernel support the normal and glow versions.

REMOVED temporarily
Last edited by KennyG123; 8th December 2014 at 11:35 AM. Reason: new version
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26th September 2012, 04:18 PM |#2  
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Very nice to see you Guevor. I am currently still running one of your kernels for the Transformer. Hopefully you can do the same magic over here.

@All, Guevor knows what he is doing and is always willing to help and troubleshoot with you. Above all, if you have bugs, Logcats are best but detailed explanations are almost just as helpful.
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26th September 2012, 07:51 PM |#3  
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whoa! guevor here!!!
27th September 2012, 01:50 PM |#4  
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Thanks, but a question
Can voltage control be added? The nook would probably benefit hugely from undervolt.
Last edited by notriddle; 27th September 2012 at 02:00 PM.
28th September 2012, 11:21 AM |#5  
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Quote:
Originally Posted by notriddle

Can voltage control be added? The nook would probably benefit hugely from undervolt.

from everything I've read, undervolting provides only a very minimal gain in battery life (we're talking about max a couple of procent)
28th September 2012, 11:54 AM |#6  
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The voltage is not fixed for each frequency, so it is modified while working, and the only thing that is fixed is the nominal value.
I have looked very little about this board, but that is what I have seen so far.
I made a compilation reducing the nominal value, but do not think it changes much.
I've also tweaked some latencies and have limited the overclocking to 1Ghz (better relation).
I've done some testing and I can see that using ondemand, the lower rate (300Mhz) is much more used, so consumption should be reduced.
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File Type: img uImage.img - [Click for QR Code] (1.83 MB, 271 views)
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28th September 2012, 12:31 PM |#7  
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can someone explain how to install this kernel?
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28th September 2012, 01:49 PM |#8  
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Quote:
Originally Posted by pet4a

can someone explain how to install this kernel?

You first need to rename the uImage.img to uImage
Then you need adb on your computer and be connected on the same net (computer and nook).
After that, you can use these instructions.
http://forum.xda-developers.com/show...9&postcount=21

I hope it will be helpful
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28th September 2012, 08:43 PM |#9  
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Thank you for this uImage Hmm...is it really to have USB host support too in this kernel? And support for the NST Glowlight? Thanks.
29th September 2012, 01:26 AM |#10  
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Quote:
Originally Posted by Filippios

Thank you for this uImage Hmm...is it really to have USB host support too in this kernel? And support for the NST Glowlight? Thanks.

bump for USB host.

also.. at 1000 MHz system seems to be working noticeably faster (placebo effect?). Thanks for compiling this kernel.
29th September 2012, 03:23 PM |#11  
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Quote:
Originally Posted by Zorkman

from everything I've read, undervolting provides only a very minimal gain in battery life (we're talking about max a couple of procent)

This is true on smartphones because most of the battery life is consumed by the display and the cell radio. There is no cell radio on the NST, and the display consumes far less, so a larger percent of the battery consumption is from the CPU and undervolting should be more effective. (let me know if I'm wrong here)

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