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

guevor · Sep 26, 2012

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

Woody · Sep 26, 2012

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.

stegg · Sep 26, 2012

whoa! guevor here!!! :good:

notriddle · Sep 27, 2012

Thanks, but a question

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

Zorkman · Sep 28, 2012

notriddle said:
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)

guevor · Sep 28, 2012

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.

pet4a · Sep 28, 2012

can someone explain how to install this kernel?

guevor · Sep 28, 2012

pet4a said:
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://xdaforums.com/showpost.php?p=24168019&postcount=21

I hope it will be helpful

Filippios · Sep 28, 2012

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.

osowiecki · Sep 29, 2012

Filippios said:
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.

notriddle · Sep 29, 2012

Zorkman said:
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)

a7t7d · Oct 2, 2012

Please clarify re:Glow

Could someone please clarify whether this kernel includes support for the Glow?

I found a mt kernel for the glow from mali100 here: http://xdaforums.com/showthread.php?t=1679036
so i know the nst kernels can be patched for the glow: but I'm unclear whether this kernel, which I'd much rather use for the overclock, has been so patched.

Thanks!

Oh, and my vote is to keep the usb host support in a separate kernel due to battery drain.

-Alley

pet4a · Oct 2, 2012

guevor said:
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://xdaforums.com/showpost.php?p=24168019&postcount=21

I hope it will be helpful

fallowed the instruction but after i reboot the device its freezes on read forever screen
am i missing something?

mali100 · Oct 2, 2012

a7t7d said:
Could someone please clarify whether this kernel includes support for the Glow?

I don't think it supports the glowlight, but you can just try it. The worst that could happen, is that the screen light doesn't work as long as this kernel is installed.

I found a mt kernel for the glow from mali100 here: http://xdaforums.com/showthread.php?t=1679036
so i know the nst kernels can be patched for the glow: but I'm unclear whether this kernel, which I'd much rather use for the overclock, has been so patched.

That's not a patched nst kernel, it's a glowlight kernel (based on the 1.1.5 nook software). Glowlight kernels work just fine on the old nst.

So what I'm trying to say is:

nst kernel on a glowlight -> works fine, just no support for the screenlight
glowlight kernel on a nst -> works perfect, no issues.

Oh, and my vote is to keep the usb host support in a separate kernel due to battery drain.

I second that, usb host is just not stable enough to be a default for everyone, particularly because a lot of people have no use for it.

guevor · Oct 2, 2012

pet4a said:
fallowed the instruction but after i reboot the device its freezes on read forever screen
am i missing something?

Maybe your device does not support the overclocking or may need more voltage.
What version did you use? The original post had a nominal voltage slightly higher.

mali100 said:
I don't think it supports the glowlight, but you can just try it. The worst that could happen, is that the screen light doesn't work as long as this kernel is installed.

That's not a patched nst kernel, it's a glowlight kernel (based on the 1.1.5 nook software). Glowlight kernels work just fine on the old nst.

So what I'm trying to say is:

nst kernel on a glowlight -> works fine, just no support for the screenlight
glowlight kernel on a nst -> works perfect, no issues.

I second that, usb host is just not stable enough to be a default for everyone, particularly because a lot of people have no use for it.

Good to know. I'll take a look and if I find no problem, I'll do a single kernel for both.

About the usb host had not even tried, but if you say it is not stable, better to keep two versions.

As a novelty, I have been making tests with the display and I'll upload a new version. I am also uploading a video I have just done to show how it works.

guevor · Oct 2, 2012

New version with a new fast display mode

I've been testing the epaper's driver, both to see how it work and to testing if I could get something new.

I added a parameter (/ sys/devices/platform/omap3epfb.0/graphics/fb0/fmode) that can enable a new fast mode.

By default starts at 0, so it works very much as always (although I modified some behavior, I have to do more tests), and if we put it to 1 enables a new faster mode.

To not extend much (and avoid being too much in front of the computer screen), I recorded a video showing the new mode, and also put a couple of images to compare the normal mode with the new one.

I have also created a small program that will allow us to switch between the two modes (I use the Reading now button for it)

Hope you are interested.

enrsil1983 · Oct 2, 2012

Thanks for the kernel.

However, I've installed the new version (in the previous post) using clockwork recovery (zipfile) but seems that overclock is inactive. Checked with "Android System Info" app.

EDIT: Reflashed using ADBWireless, now 1 GHz is recognized. And "Fast Mode" is far better than "No Refresh" when browsing web and testing games.

pet4a · Oct 2, 2012

guevor said:
Maybe your device does not support the overclocking or may need more voltage.
What version did you use? The original post had a nominal voltage slightly higher.
works.

nook ver 1.1.2 rooted using touchnooter.

i used B&N update to revive my nook.

osowiecki · Oct 2, 2012

enrsil1983 said:
Thanks for the kernel.

However, I've installed the new version (in the previous post) using clockwork recovery (zipfile) but seems that overclock is inactive. Checked with "Android System Info" app.

"CPU Master Free" shows 1000 MHz in Performance mode.

- Can you add USB HOST support to this Kernel? It would make this one the best kernel available.
Thanks

- from time to time while the wifi is on, Nook freezes.

bisbal · Oct 3, 2012

Hi Guevor,

This is really cool stuff! Thanks!

BTW some people tried to upgrade from Eclair to Froyo but all them got stuck at some point, apparently there are problems with the drivers that are closed source, but I dont see why can't we take the drivers for a similar device that uses Froyo. What is your opinion on this?

I'd be happy to help so you can minimize the amount of time in front of the computer

Gracias!

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

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