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Wifi issue with unknow RK3026 tablet

If I try to turn wifi bar on it will automatic slide to off position. It says that "turning wifi on" but nothing happens.

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Vohukain

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2014/08/25 - 10:42

Hi!
I have an android tablet but I don't know exactly what device it is. Here is everything what I know:

Reveal Spoiler

-Brand: Rockchip
-Model: Q8
-Android: 4.2.2 (SDK: 17)
-Kernel: Linux version 3.0.36+ (lijian@ibm-0A) (gcc version 4.6.x-google 20120106 (prerelease) (GCC)) #69 SMP PREEEMPT Thu Jan 16 15:50:05 HKT 2014
-Number of the version of the software: rk3026-eng 4.2.2 JDQ39 eng.lijian.20140107.155201 test-keys
-CPU Model: Rockchips Cortex-A9 (Dual Core, freq: 312-1008MHz)
-Renderer: Mali-400 MP
-Resolution: 800x480
-Rear and front camera: 1,9 MP (1600x1200) and 0,3 MP (640x480)
-Ram: 512MB
-System storage: 0,98GB
-Internal storage: 1,90GB
-GPU version: OpenGL ES 2.0

Also I got some manual with it but there was only "MID Android". Tablet looks like THIS

First I rooted my device with chinese program called Vroot. Then I installed TWRP (I haven't find working CWM for my tablet) and I made backup with it. Then I tried to flash this rom (made by Cash1977) but I didn't flash it with kernel partion so I ended up to a bootloop. Then I tried to restore my TWRP backup but the backup was not proper. The system part size was only 4kt. When I did restore my backup TWRP said "no os installed are you sure you wish to reboot". When I rebooted it ended up to a bootloop again.

Then I flash with Cash's rom and this kernel (3.0.36+ (lijian) #69) and device booted up nicely. Only porblem is now that wifi is not working. I tried also this rom (made by Oma) with same kernel but wifi didn't work.

The issue: If I try to turn wifi bar on it will automatic slide to off position. It says that "turning wifi on" but nothing happens. When I go settings>advanced I noticed that mac address is unavailable. Also when I go settings>about tablet>status I found put that imei is unknow.

I guess that I can fix wifi issue if I can find these files FOR MY DEVICE:

- libhardware.so
- libhardware_legacy.so

-8188eu.ko
-8188eu.ko.3.0.36+
-8192cu.ko
-8192cu.ko.3.0.36+
-rkwifi.ko
-rkwifi.ko.3.0.36+
-wlan.ko
-wlan.ko.3.0.36+

Another way to fix wifi would be flashing 3.0.8+ kernel to my device because OMA's rom uses 3.0.8+ wifi modules. I don't know where I could find 3.0.8+ kernel for my tablet.

Can anyone help me?

Oma7144

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2014/08/25 - 11:00

Does the TWRP backup contain the genuine kernel?

- Oma -

Per aspera ad astra, we rock the Tablets !

If you like our firmwares, please consider making a donation to support our work.
Thank you!

Vohukain

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2014/08/25 - 13:08

Here is the whole backup except data part: https://www.dropbox.com/sh/tyocuge5nyaytys/AAC00QmNfmU73T4A4e8idxQfa?dl=0

Sorry but I don't know what genuine kernel means. I'm very new with custom things. Someone also said this when I posted my TWRP backup at XDA:

"what I noticed was that what the boot.img you posted was mounting as system, recovery was mounting as data"

I don't know what that means.

Oma7144

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2014/08/25 - 13:24

Ok, here is your kernel: Linux version 3.0.36+ (lijian@ibm-0A) (gcc version 4.6.x-google 20120106 (prerelease) (GCC)) #69 SMP PREEEMPT Thu Jan 16 15:50:05 HKT 2014.

Check out with the Roverpad build. Just replace the kernel in folder rockdev/Images.

- Oma -

The following users say thank you to Oma7144 for this useful post:

Vohukain

Per aspera ad astra, we rock the Tablets !

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Vohukain

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2014/08/25 - 13:49

Thanks your quick reply but roverpad build (Oma RK3026 Roverpad TRC7 JB 4.2.2 (341.1 MiB)) didn't help with that kernel you post. Still the same wifi problem. Any other ideas?

Oma7144

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2014/08/25 - 13:52

Let me have a dmesg log.

Boot tab fresh and try 2 times to enable/disable wifi. Then do the log.

- Oma -

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Vohukain

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Vohukain

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2014/08/25 - 14:09

I will do that when I get my tablet back to alive. I tried to flash some 3.0.8+ kernel and device doesn't boot and AndroidTool doesn't regonise it.

EDIT: Tablet is back to alive. I will do dmesg next

Oma7144

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2014/08/25 - 14:12

Ok, now it is hard work:

- Oma -

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Vohukain

Per aspera ad astra, we rock the Tablets !

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Vohukain

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2014/08/25 - 14:23

Is this how I can pull out dmesg file. I write this when I "open" adb connection.

su
dmesg >/mnt/sdcard/dmesg.txt
logcat -d -v time >/mnt/sdcard/logcat.txt

Oma7144

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2014/08/25 - 14:25

Yes, but you need a running firmware.

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Vohukain

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Vohukain

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2014/08/25 - 15:02

Here is dmesg: https://www.dropbox.com/sh/rn4gx8u9fv2llk0/AAB3fJgmiJ4D2kCe_8lLCFc_a?dl=0. I didn't succes to pull out dmesg file so I put in adb this: "adb shell dmesg" and I take print screen. Number 1 pic is last and number 2 is second last and so on.

Oma7144

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2014/08/25 - 15:09

What is it? Build and kernel pls.

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Vohukain

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Vohukain

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2014/08/25 - 15:50

Same what you post earlier. This kernel (Linux version 3.0.36+ (lijian@ibm-0A) (gcc version 4.6.x-google 20120106 (prerelease) (GCC)) #69 SMP PREEEMPT Thu Jan 16 15:50:05 HKT 2014) and this rom (Oma RK3026 Roverpad TRC7 JB 4.2.2 (341.1 MiB))

Oma7144

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2014/08/25 - 15:54

Ok, that means your tab is back?

Pls do a clean install incl. eraseIDB and let me have the logs.

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Vohukain

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Vohukain

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2014/08/25 - 16:02

Yes my tablet is back :). I flash roverpad firmware again and clear IBD and then post dmesg again.

EDIT: I did erase IBD but now I can't flash any files because the parametre files is not working with my device. I used parametre file form roverpad folder

EDIT: I got it working again. I'm now flasing roverpad

EDIT: I can't do proper clean install. When I erase IBD and flash firmware the device doesn't boot up properly. It is booting but even launcher is not working. Only way I can boot up nively after erase IBD is flash boot.img, system.img and kernel.img again.