[Nook Color Android Development] dalingrin:
Using this kernel is at your own risk. Before flashing make backups!!!

Overview

-In addition to the general CPU overclock the DSP and possibly the L3 bus are overclocked to levels comparable to other higher end OMAP3 SOCs. This should result in a minor speed up in video decoding among other things. Occip pointed out that the L3 bus is set in the boatloader and kernel values are ignored. I still need to investigate this.

I feel comfortable with the overvolt used in these kernels for a few reasons. Omap cpus automatically reduce voltage based on load and stability. The voltage gating in omap processors is very advanced. Absolute voltages set in the kernel are only a maximum for a given clock rate. The cpu should seldom reach the defined maximum. In addition the highest overvolt used is very small ~0.05v.​

Common Features for 2.6.32 builds

-As of 06/09/11 the CPU clock can be customized via this app: http://xdaforums.com/showthread.php?t=1104039

-Overclockable to 1200mhz and 1100mhz. Must be set with an app like SetCPU unless running CM7. CM7 has overclocking under Cyanogenmod settings. DO NOT use SetCPU profiles with CM7.

-****Small overvolt**** compared to the stock 3621 specs. This is running at the same voltage as the omap3630 which is very similar to our CPU.

-1.2ghz is overvolted slightly more compared to 1.1ghz. Resultant voltage is dependent on your particular hardware. It will attempt to dynamically scale to keep stability.

-Available clock speeds: 300mhz, 600mhz, 800mhz, 1100mhz, 1200mhz

-Partial fix for strange touchscreen edge behavior brought to you by deeper-blue.

-Smartass CPU governor. Very similar to the Interactive governor found in my 2.6.29 kernel but with a built in SetCPU profile-like functionality. CPU clock speed is limited to 3-600mhz when the screen is off.

-Various performance tweaks.​

Kernel Downloads

* This kernel is included in CM7 starting with nightly 132 and will be CM 7.1 stable. There is no need to flash a separate kernel unless you are running Stock Froyo 1.2.

* 2.6.29 releases are discontinued and no longer supported. They will remain hosted for those that might need them.

* There are separate builds for CM7 and stock 1.2 Froyo

* 2.6.32 CM7 builds currently do not work with the stable CM7 builds until CM7.1. You need to use CM nightlies until 7.1 is released.

* All 2.6.32 kernels require an updated u-boot from B&N 1.2 Froyo. If your Nook has "Read Forever" or a green Cyanogenmod logo on the screen when you boot then you have the latest version. If it says something else then you need to update.

All kernels hosted here:

http://kan.gd/uic
​

md5sum for kernels:

0c1a3f88da68f17a187e7d6535e3ecef ./090111/update-Froyo1.2-dalingrin-OC-sd-090111.zip
5673c886a08577d963be7722528a6865 ./090111/update-Froyo1.2-dalingrin-OC-emmc-090111.zip
a526a38d41a5b7a069ed5e12b8799815 ./063011/update-Froyo1.2-dalingrin-OC-sd-063011.zip
a8ba40ac44241543be52854c048b3a72 ./063011/update-Froyo1.2-dalingrin-OC-emmc-063011.zip
94ff341d338ddcd432afa313f03edaa3 ./063011/update-CM7-dalingrin-OC-sd-063011.zip
aacfb728b2a650ca5194d4ece097f22e ./063011/update-CM7-dalingrin-OC-emmc-063011.zip
130fe72bbffa0a660475c1d360de1548 ./061811/update-Froyo1.2-dalingrin-OC-emmc-061811.zip
bfc4e9e3f70d45324201bd6a14a44bc0 ./061811/update-CM7-dalingrin-OC-sd-061811.zip
7156b00dffc5a636cd6d7a53e00abe2c ./061811/update-CM7-dalingrin-OC-emmc-061811.zip
ca101e3b9a2874e3521c89453352b0ed ./061311/update-Froyo1.2-dalingrin-OC-sd-061311.zip
d17e29cc5a3a758b8a445e4d554e9538 ./061311/update-Froyo1.2-dalingrin-OC-emmc-061311.zip
1ba2195b53a15d31ef9cd23e9fc5342a ./061311/update-CM7-dalingrin-OC-sd-061311.zip
0048009800107dc596a3c06d8df33aff ./061311/update-CM7-dalingrin-OC-emmc-061311.zip
adb0afe1d5999ee30e773bf112aa6d76 ./060911/update-Froyo1.2-dalingrin-OC-sd-060911.zip
7d1c53b29f0513543b515e0c37e4c8cb ./060911/update-Froyo1.2-dalingrin-OC-emmc-060911.zip
a770009f2807e04f6761bb315309a9a4 ./060911/update-CM7-dalingrin-OC-sd-060911.zip
fd6634c0a904d8fc92b9e38583cde5ad ./060911/update-CM7-dalingrin-OC-emmc-060911.zip
52b593ddabf70cc84b24c479cdb871f1 ./052311/update-Froyo1.2-dalingrin-OC-sd-052311.zip
43e498da25b62ec0516471ecfb600eb7 ./052311/update-Froyo1.2-dalingrin-OC-emmc-052311.zip
5732fa2ef134d351ec98635e4beb8128 ./052311/update-CM7-dalingrin-OC-sd-052311.zip
d6dac86b336e4ca0f9f8daffba9237ea ./052311/update-CM7-dalingrin-OC-emmc-052311.zip
a02ebb0350533af211089cde95fb5105 ./051311/update-Froyo1.2-dalingrin-2.6.32-emmc-051311.zip
1177d17548c65f89962720ba3bbffaa4 ./051311/update-cm7-dalingrin-2.6.32-sdcard-051311.zip
bfa163bc7ad0e1208997af1dbfb9e33b ./051311/update-cm7-dalingrin-2.6.32-emmc-051311.zip
053ad16383b7b2abc859f622927c965e ./042411/update-CM7-dalingrin-OC-sd-042411.zip.md5
9d0f3fe6d4781a0a2e7b494523c1db72 ./042411/update-CM7-dalingrin-OC-sd-042411.zip
7652d13fc5f3d819b986fda7e6d3ee3f ./042411/update-CM7-dalingrin-OC-emmc-042411.zip.md5
1569ba396bdac3404f997d7e05faa247 ./042411/update-CM7-dalingrin-OC-emmc-042411.zip
6a7519ba0ae3a7b4f34e38fdb7fa0d0c ./042311/update-CM7-dalingrin-OC-sd-042311.zip
f62579042d610f4fbf739d41f7aebc48 ./042311/update-CM7-dalingrin-OC-sd-042311B.zip
a241e36f4c6c663190eb4a13b1cc73c4 ./042311/update-CM7-dalingrin-OC-sd-042311A.zip
19bd148a4a180c1bf6b88559ffc0f9f5 ./042311/update-CM7-dalingrin-OC-emmc-042311.zip
745960368e2ada7d48db13b37a997d4c ./042311/update-CM7-dalingrin-OC-emmc-042311B.zip
4fd0718b4418ccdf56f230df147e7b41 ./042311/update-CM7-dalingrin-OC-emmc-042311A.zip
b16f61d937e39f6b1fe35463d576a671 ./041911/update-froyo-dalingrin-OC-sd-041911.zip
3b44f1972c947da700a835d29c654f34 ./041911/update-froyo-dalingrin-OC-emmc-041911.zip
a335f912d3cb3faffb4366e20fda7654 ./041811/update-CM7-dalingrin-OC-sd-041811C.zip
41817da1d160733d5ce198cb0139db46 ./041811/update-CM7-dalingrin-OC-sd-041811B.zip
7b91add1ce7bdd2a6722071aec8098eb ./041811/update-CM7-dalingrin-OC-emmc-041811.zip
e77dedc60d8f0af588820af533d6004c ./041811/update-CM7-dalingrin-OC-emmc-041811B.zip
0846c996bad671a07c095a783506a139 ./041311/update-CM7-dalingrin-OC-sd-041311.zip
34a13469b79700c1ae7bcc0ab056abdc ./041311/update-CM7-dalingrin-OC-emmc-041311.zip
25610f0b29c944762b642aec495d4193 ./041211/update-froyo-dalingrin-OC-sd-041211.zip
b3efe8ac1a514e43157eb32cbefce791 ./041211/update-froyo-dalingrin-OC-emmc-041211.zip
bac72586c1fa1a4c374f3cc5ad0c1cbf ./041211/update-CM7-dalingrin-OC-sd-041211.zip
44e2984a61eca20cbde595da7e66f9f5 ./041211/update-CM7-dalingrin-OC-emmc-041211.zip
b8e5425a7288a5b43e39c5f455eeb0d7 ./041111/update-CM7-dalingrin-OC-sd-041111.zip
7181812d69ecdc80f32fc0b3f5c1181f ./041111/update-CM7-dalingrin-OC-emmc-041111.zip
def332f172d6db5822c436900d36b65a ./040511/update-CM7-dalingrin-OC-sd-040511.zip
385234a8e7f7da3212171d37eab1d95e ./040511/update-CM7-dalingrin-OC-emmc-040511.zip
bae26ee57c51ac48d687a7a3f4d1efb9 ./040411/update-froyo-dalingrin-OC-sd-040411.zip
8f99790621b3bc0fef4a7d5f3319c009 ./040411/update-froyo-dalingrin-OC-emmc-040411.zip
200be792e966453e21bbec0d6b10a288 ./040411/update-eclair-dalingrin-OC-sd-040411.zip
872dbe19f539cec5e9e58e6b36aede35 ./040411/update-eclair-dalingrin-OC-emmc-040411.zip
53e66c6328a72ed500c6d47bd9c48ea6 ./040411/update-CM7-dalingrin-OC-sd-040411.zip
abe51daa708ecdafb74d286dd21ad2d8 ./040411/update-CM7-dalingrin-OC-emmc-040411.zip
684c0a009c4503e7ad8111e4d2889d93 ./033111/update-froyo-dalingrin-OC-sd-033111.zip
e75019d04668208cbe81e5aa8daf5ed5 ./033111/update-froyo-dalingrin-OC-emmc-033111.zip
61c35771ff5ef267ca47fbae36d901df ./033111/update-eclair-dalingrin-OC-sd-033111.zip
a3da36043ea8efac3b35c5f82aa24d3d ./033111/update-eclair-dalingrin-OC-emmc-033111.zip
34bd1736b35f400a936b5adfdd5d061c ./033111/update-CM7-dalingrin-OC-sd-033111.zip
2bccf595bbec4010724ede6365a4644d ./033111/update-CM7-dalingrin-OC-emmc-033111.zip
fba87ec0d18411e72b5718fde1607e9e ./032811/update-froyo-dalingrin-OC-sd-032811.zip
6601902dbc03ea67ee97eda1a59c9fcd ./032811/update-froyo-dalingrin-OC-emmc-032811.zip
f133b2c452382f04f8b50dfb790527c7 ./032811/update-eclair-dalingrin-OC-sd-032811.zip
692330cc8b13ce1b041e2a87c633168e ./032811/update-eclair-dalingrin-OC-emmc-032811.zip
6bacc09cf04e7edf78eefcc6fb728838 ./032811/update-CM7-dalingrin-OC-sd-032811.zip
4c9102c3f2a6f253c81c777029ba7980 ./032811/update-CM7-dalingrin-OC-emmc-032811.zip
13c03150b72938fa15f43bd795969dfe ./031611/update-CM7-dalingrin-OC-sd-031611.zip
b481b9f729e465e258e4fdb85dc1700d ./031611/update-CM7-dalingrin-OC-emmc-031611.zip
4ddd47b2633b86004f970faa53aba671 ./031311/update-CM7-dalingrin-OC-sd-031311.zip
c534673e003946a6ed108f60bb075d55 ./031311/update-CM7-dalingrin-OC-emmc-031311.zip
e54bdeefac03912e4948b753ce73276b ./031111/update-CM7-dalingrin-OC-sd-031111.zip
67857a797ecb8219ad4ff3b5e5581d88 ./031111/update-CM7-dalingrin-OC-emmc-031111.zip
cbf70b6556ccc58690257026c224a56b ./031011/update-froyo-dalingrin-OC-sd-031011.zip
cfb083c3ec0816b893d43cade27e3b4e ./031011/update-froyo-dalingrin-OC-emmc-031011.zip
90aaab882957111328503573f9ffd16c ./030811A/update-froyo-dalingrin-OC-sd-030811A.zip
55c282c3928abadd0486bc04cbfd2e74 ./030811A/update-froyo-dalingrin-OC-emmc-030811A.zip
71df4553e3986719750dde72d3da5e96 ./030811A/update-CM7-dalingrin-OC-sd-030811A.zip
91637380e3ec853c8506e50e72be07ff ./030811A/update-CM7-dalingrin-OC-emmc-030811A.zip
25ba50b8865315b44fc8b98d382b5447 ./022511/update-HC-dalingrin-OC-sd-022511.zip
f08c443ed730b147e57ac224fdd521eb ./022511/update-HC-dalingrin-OC-emmc-022511.zip
3243664a945b82fde9895bdfd59db701 ./022511/update-Froyo_CM7-dalingrin-OC-sd-022511.zip
0bf22eface5c313c783b627d7a85d475 ./022511/update-Froyo_CM7-dalingrin-OC-emmc-022511.zip
6efa7c62b5edf1d313996c13bed3d224 ./022511/update-eclair-dalingrin-OC-sd-022511.zip
b2dfb032aae911e81708df8f39a22381 ./022511/update-eclair-dalingrin-OC-emmc-022511.zip

Updates:

[9/01/11] - Update to 1.3 source drop and other odds and ends

[6/30/11] - Add voltage control, add InteractiveX governor, fix typos, change in audio wake lock

[6/18/11] - Fix ondemand gov, USB host support(including xbox gamepad), bluetooth wake lock, improved wifi

[6/13/11] - Remove BFS due to sleep issues. Backport 2.6.39 ondemand governor.

[6/09/11] - Support for customizing the CPU overclock. Kernel ships defaulted to OC up-to 1.2ghz but can now be changed via an app. Minor change in SDIO(wifi) release behavior.

[5/23/11] - BFS scheduler. BFQ I/O scheduler, SLQB allocator, Tiny RCU, removed smartass and ondemand, optimized KCFLAGS, fix video issues for people with modified u-boot, and more...

[5/13/11] - 2.6.32 builds for CM7 beta and B&N 1.2 Froyo

[4/04/11] - Minor update to all kernels: utf8 filesystem support and advanced routing for Cisco VPN connections.

[3/31/11] - All kernels except Honeycomb: VPN fixed(hopefully).

-DSP fix with overclock: http://xdaforums.com/showpost.php?p=12564117&postcount=1017

[3/28/11] - All kernels execpt Honeycomb: Cifs and tun modules included. Netfilter/IPtables tested insofar as Droidwall worked

-CM7 and Froyo: Reverted the 2.6.29.6 update because of I/O performance problems found by Divine_Madcat

[3/16/11] - CM7: 2.6.32 DSP driver backport for video playback support.

[3/13/11] - CM7: Bluetooth/sysfs race condition fix. Fix spotted upstream by verygreen

[3/11/11] - Bluetooth added to CM7 kernel

[3/8/11] - Attempt #3 to get proper VPN support...TUN support in kernel and removed module.

[3/8/11] - For CM7: internal storage mounting. For froyo and CM7: Interactive governor, various backports, attempt #2 for Netfilter w/NAT, tun/tap module.

-Be sure to enable the interactive governor in Cyanogenmod settings->Performance->CPU for CM7

-And use something like SetCPU for Froyo

[2/25/11] - Performance tweaks. Netfilter, iptables, and tuntap support in kernel. Few fixes

[2/23/11] - All kernels updated including eclair. Eclair now at feature parity. Kernel no longer overclocks on boot. Increased speaker and headphone volume. All kernels CWM flashable.

[2/18/11] - Cache line check race condition. CM7 support.

[2/6/11] - New Honeycomb(v03+) and Froyo kernels. Touchscreen workarounds from Deeper-blue. Various optimizations.

[2/5/11] - New Honeycomb kernel to work with v03+

[2/2/11] - Update with Honeycomb info

[1/30/11] - Froyo 1ghz kernel posted

[1/24/11] - Froyo test kernel

-1.1ghz froyo test kernel. It has not been extensively tested. Please report results.

[1/23/11] - 1.1ghz kernel added

-This kernel is stable on my Nook after 10 Quadrant runs. Still boots everytime as well.

-Renamed the 1ghz kernel to match new 1.1ghz kernel

[1/23/11] - New 1ghz kernel added

-This kernel is an experiment it uses more Omap3630 settings than the previous kernel which seems to make it stable for me.

-I don't expect this kernel will be stable for everyone but for those that could get 950mhz to work, you may be able to get this 1ghz kernel working.

-Only short term stability testing so far. YMMV
​

Source code:

Eclair:

https://github.com/dalingrin/NookColor_Kernel

All others:

https://github.com/dalingrin/nook_kernel
​

Install Instructions:

All kernels are CWM flashable.

If not using CWM, unzip the contents of the update and push uImage onto /boot partition. Then you will need to copy the system folder.

if flashing to sdcard:
adb shell mount -t vfat /dev/block/mmcblk1p1 /emmc
adb push uImage /emmc/uImage
adb remount
adb push system /system

if flashing internal eMMC
adb shell mount -t vfat /dev/block/mmcblk0p1 /emmc
adb push uImage /emmc/uImage
adb remount
adb push system /system

Reboot Nook!

If you have problems with force closing apps or poor performance, clear the dalvik cache and regular cache.

DO NOT use the Rom Manager option to wipe data and cache. You do not want to wipe data. Just boot into CWR

and wipe cache, then under advanced wipe dalvik cache.

Note that the first boot after clearing the caches will take longer than normal.

Yes....This color is hideous.