MK808B KitKat kernel [Working WiFi & BT]

[BalintBanyasz]

I've just finished compiling a KitKat kernel for MK808B.
WiFi and Bluetooth work great

Thanks to mo123 for his defconfig file and mawkish for his RK903 patch.

Download kernel image from here (2016-01-18):
mk808b_rk903_wifi_fix_kk.zip
mk808b_rk903_wifi_fix_720p.zip


Supported ROMs:

• MK808B (RK903) KitKat 4.4.2 ROM (recommended)
• Dumonde's MK808 ROM
• Shomari's Kit Kat 4.4.2 RK3066
• Smallart Uhost2 KitKat (U2.442.000.11.140327)

Non-supported ROMs:

• Allminipc_ug802_RT8188_4.4_720p

Known issues:

• None (wifi bug is fixed)

Build instructions:

git clone https://github.com/BalintBanyasz/kernel_rockchip.git --branch rockchip-3.0-rbox-kk --single-branch rockchip-3.0-rbox-kk

cd rockchip-3.0-rbox-kk

./build_mk808b

[prahjister]

I've just finished compiling a KitKat kernel for MK808B.
WiFi and Bluetooth work great

Use it with an existing RK3066 KitKat rom (e.g. U2.442.000.11.140327) or wait for mo123's rom.

Thanks to mo123 for his defconfig file and mawkish for his RK903 patch.

[ATTACH]7487[/ATTACH]

Nice i will try on my non b tonight.

[Bueno]

Interesting. Thank you for sharing.

[rk903]

Thank you

Hi,

thanks for the work and sharing the results.

[rk903]

Only two penguins

Hi,

I own a MK808B with RK903 wifi chip. Today I tried to run:

- mo123's kitkat rom --> two penguins
- mo123's kitkat rom + your kernel --> two penguins

(I included the newer bootloader that mo123 posted on his webpage)

Before that I tried the kitkat roms that have been around for the ugoos sticks (from allminipc forum) --> two penguins

With the imito kitkat rom from http://www.freaktab.com/showthread.p...from-RIKOMAGIC the I get past the kernel start and into recovery, but it stops at "Formatting /data" and does nothing (waited *very* long).

With Android 4.2 roms this has never been an issue - roms for clones (like with AP6210 or MTK chips) would still work (but without wifi or bluetooth, of course). As I use ethernet and a wireless keyboard+mouse, that would not be a problem).

Flashing the kitkat roms always worked without any errors. Any ideas what I should try?

[BalintBanyasz]

Hello,

I've tested this kernel with three KitKat ROMs mentioned in the op. Each one of them booted just fine with both the included and my MK808B kernel.

I haven't tested mo123's ROM yet.

Since I have Windows 8.1 which isn't supported by the Rockchip tools, I use Ubuntu to flash the ROMs/kernels:

First, I use Linux Upgrade Tool v1.16 to install the complete ROM

• sudo ./upgrade_tool ef update.img (EraseFlash)
  
• sudo ./upgrade_tool uf update.img (UpgradeFirmware)
  

Then I flash the kernel using the RkFlashKit utility

• Backup Partition (optional)
• Erase Partition
• Flash Image
• Reboot

Using these steps I've never faced the problem that you've described. If you have a Linux machine at hand, I suggest you follow these steps for a clean install.

Hi,

I own a MK808B with RK903 wifi chip. Today I tried to run:

- mo123's kitkat rom --> two penguins
- mo123's kitkat rom + your kernel --> two penguins

(I included the newer bootloader that mo123 posted on his webpage)

Before that I tried the kitkat roms that have been around for the ugoos sticks (from allminipc forum) --> two penguins

With the imito kitkat rom from http://www.freaktab.com/showthread.p...from-RIKOMAGIC the I get past the kernel start and into recovery, but it stops at "Formatting /data" and does nothing (waited *very* long).

With Android 4.2 roms this has never been an issue - roms for clones (like with AP6210 or MTK chips) would still work (but without wifi or bluetooth, of course). As I use ethernet and a wireless keyboard+mouse, that would not be a problem).

Flashing the kitkat roms always worked without any errors. Any ideas what I should try?

[rk903]

It is interesting that you can use the images with both the supplied and your kernel. I must be doing something wrong or my board/flash is somehow different.

Sadly I only have Linux inside VMware.

[mowgli]

Known limitations:

• Significantly lower performance when WiFi is turned on
  • 10-15000 -> 4500 points in AnTuTu
  
  

Hi,
First of all, thank you !
I must be missing something here. Is Antutu score drops to 4500 points when the WiFi is on or is it dropping by 4500 points ?
Is the performance (with WiFi On) better than Android 4.1 ?

Thank you!

[BalintBanyasz]

Hi,
First of all, thank you !
I must be missing something here. Is Antutu score drops to 4500 points when the WiFi is on or is it dropping by 4500 points ?
Is the performance (with WiFi On) better than Android 4.1 ?

Thank you!

When WiFi is disabled the KitKat ROMs are just as smooth, if not even smoother than 4.1 and 4.2 ROMs.
When WiFi is on, Antutu score drops to 4500-5300 points and the system becomes a bit sluggish.

I don't know what causes this. I've only added a few lines to initialize the WiFi/BT module but I haven't touched any other kernel part or driver.

So for now, KitKat ROMs on MK808B are best used with an external USB LAN adapter until someone comes up with a proper WiFi fix.

[mowgli]

When WiFi is disabled the KitKat ROMs are just as smooth, if not even smoother than 4.1 and 4.2 ROMs.
When WiFi is on, Antutu score drops to 4500-5300 points and the system becomes a bit sluggish.

I don't know what causes this. I've only added a few lines to initialize the WiFi/BT module but I haven't touched any other kernel part or driver.

So for now, KitKat ROMs on MK808B are best used with an external USB LAN adapter until someone comes up with a proper WiFi fix.

Thank you for a quick response!

[mo123]

Any progress on the low performance with wifi turned on?

[tecfan69]

I've test your kernel with the U2 stock rom (rooted). I didn't check WiFi. The stick boot several times and then it was done. Stuck on android logo. Did that happen on your device as well?

If KitKat is up and running the rom is smooth so far. But scrolling within the stock browser is very bad.

Your kernel is 1080. Did you test a 720p as well and what rom do you prefer?

[BalintBanyasz]

I've test your kernel with the U2 stock rom (rooted). I didn't check WiFi. The stick boot several times and then it was done. Stuck on android logo. Did that happen on your device as well?

If KitKat is up and running the rom is smooth so far. But scrolling within the stock browser is very bad.

Your kernel is 1080. Did you test a 720p as well and what rom do you prefer?

No, I haven't had that problem. I'm currently using Dumonde's MK808 ROM.
I've uploaded the 720p kernel as well but there isn't much improvement over the previous one.
You can use this command to check the actual framebuffer resolution:

cat /sys/devices/platform/rk-fb/graphics/fb0/disp_info

As prahjister pointed out in his post, the performance drop is most likely caused by the Broadcom WiFi drivers. There is a process named dhd_dpc that is eating up about 30% of the CPU when WiFi is enabled.

[prahjister]

No, I haven't had that problem. I'm currently using Dumonde's MK808 ROM.
I've uploaded the 720p kernel as well but there isn't much improvement over the previous one.
You can use this command to check the actual framebuffer resolution:

cat /sys/devices/platform/rk-fb/graphics/fb0/disp_info

As prahjister pointed out in his post, the performance drop is most likely caused by the Broadcom WiFi drivers. There is a process named dhd_dpc that is eating up about 30% of the CPU when WiFi is enabled.

might want to compare init.rc from a working one and mabe even go as far as doing a compare on binary.....beyond compare is a great tool for this.

[BalintBanyasz]

Minor update - Enabled power indicator LED

Here is an updated kernel with the power indicator LED enabled:

kernel_mk808b_kk_1080p_20140830.zip

The wifi bug is still present