Requesting Firmware Dumps from Coby Generation 3 Devices

[steev]

Disclaimer: Due to users continuously bricking their tablets by attempting to use the Livesuite ROM images in this post, the links to those images have been removed. System dumps are unaffected.

----------------------------------------------------------------------------------------------------------------

I am requesting firmware dumps from Coby Generation 3 (MIDxx42) devices using the Allwinner A10 SoC.
With these I should be able to create firmware restore images to be used for unbricking.

Firmware dump instructions here:
http://www.androidtablets.net/forum...mps-coby-generation-3-devices.html#post205970

Then upload the *.img files and system.tgz you pulled

Thanks

Coby doesn't provide firmware downloads for these tablets, which is why I'm trying to put these together.

UPDATE:

WARNING:
I have tested these on my Novo 7 Elf tablet which has similar hardware and it worked, but I can't guarantee they work on the Coby tablets since I do not have the hardware to test.
Therefore, I recommend that somebody with an already bricked tablet be the first to try it.

Firmware restore images for Coby Kyros 7042:

It was discovered that Coby is using 2 different touchscreens in the 7042 models, goodix and ft5x_ts.

The firmware below should support both touchscreens:
coby_7042_4.0.3_dual_ts.zip (Thanks David for the dump), Confirmed working by David

The following firmware only supports 7042 models with Goodix touchscreens:
coby_7042_4.0.3.zip (Thanks to Joe88 for providing the dump)
md5: 3c014061580d74c4c6b112204f3deb92

Firmware restore images for Coby Kyros 9742
coby_9742_4.0.3.zip (Thanks to RedDeer for providing the dump), Confirmed working by swalker5906
md5: 71a31c954e164a0bb7f19bbd1a143d7a


Flashing instructions:
- Download LiveSuite, this is the flashing software for A10 devices
- Run LiveSuitePack.exe (a bunch of files will be extracted to the current folder, so best to create a new one)
- Now run livesuite.exe
- Choose "SelectImage"
- Choose the coby_kyros_4.0.3.img
- Now you need to put your device in upgrade mode, to do so:
1. power off the device
2. Press and hold any physical key except the power key on the device(ie, press and hold Vol+ key, still holding in 3 and 4)
3. Connect the tablet to your PC via USB cable
4. Repeatedly press the power button until a popup dialog shows on your computer screen
- Now follow the on-screen instructions

If this works I look forward to seeing some custom ROMs from the Coby community

 

[l8asusul]

I read that my 7042-4 has the Cortex A8 CPU. Do you still want the firmware dump? Where can I find the process to perform said dump?
Thanks
Don

 

[steev]

I read that my 7042-4 has the Cortex A8 CPU. Do you still want the firmware dump? Where can I find the process to perform said dump?
Thanks
Don

Thanks! The 7042 is one of the firmware dumps I'm looking for.

Attached is a script that will dump your firmware.

Instructions:
- Install the ADB drivers for your device. (This guide here should work)
- Root your device (see here: http://www.androidtablets.net/forum...s-coby-generation-3-devices-2.html#post206352)
- Download and unzip the attached file
- Run dump.bat
- Click "allow" if the Superuser dialog pops up on your tablet.

The firmware files will be in the "dump" folder.

 

[Joe88]

are the

bootloader.img, boot.img, recovery.img

supposed to be 0kb?

I got an error near the end saying it couldnt "tar mount error(do you have root?)"

the system file is 104MB

I'll upload it

edit: http://www.mediafire.com/?atgat89whf7mqc3

(I made an error on the model number, just change it )

 

[steev]

Damn, I assumed it would already be rooted like the base Allwinner firmware, but I guess Coby changed it.

Your system dump might be usable though.
We will need root to dump the others.

 

[Joe88]

Coby_Kyros_MID4072-4_dump.rar
(made an error on the model name, just change it)

 

[steev]

Thanks!

Your system dump looks good.
I will try to come up with a way to root this firmware so the other files can be dumped.

 

[steev]

edit: does not work

 

[davidmatt34]

When you say insert a "USB device" do you meen to connect it to the tablet?

 

[davidmatt34]

This is what I got when I ran the .bat

Waiting for device...
Pushing files...
push: data/Superuser.apk -> /sdcard/Superuser.apk
push: data/su -> /sdcard/su
2 files pushed. 0 files skipped.
3613 KB/s (865867 bytes in 0.233s)
failed to copy 'usb_modeswitch.sh' to '/system/etc//usb_modeswitch.sh': Read-onl
y file system
Unable to chmod /system/etc/usb_modeswitch.sh: Read-only file system
Finished
Press any key to continue . . .

 

[steev]

When you say insert a "USB device" do you meen to connect it to the tablet?

Yes.

This is what I got when I ran the .bat

Waiting for device...
Pushing files...
push: data/Superuser.apk -> /sdcard/Superuser.apk
push: data/su -> /sdcard/su
2 files pushed. 0 files skipped.
3613 KB/s (865867 bytes in 0.233s)
failed to copy 'usb_modeswitch.sh' to '/system/etc//usb_modeswitch.sh': Read-onl
y file system
Unable to chmod /system/etc/usb_modeswitch.sh: Read-only file system
Finished
Press any key to continue . . .

Thanks for trying.

That's what I feared, Coby did mount /system read-only.
Will have to try something else.

 

[steev]

Ok here is root attempt #2 if anybody will kindly try.
I am fairly certain it will work on the 7042, might need to be modified for the others.

If this works I take no credit, the root exploit was done by saurik.
The only thing I did was figure out the offsets for Coby's run-as bin.

Instructions:
- Install USB drivers like in earlier post
- Download and unzip attached file
- Run root.bat

If it worked you should now be rooted.

Hopefully this one works, and sorry about the previous failed attempt.

 

[Joe88]

I got this error

 

[davidmatt34]

Bummer....again

 

[steev]

I got this error

Ok that is good news, the exploit did work.
I just need to use 'busybox cp' in the root script.

I'll fix the script really quick.

Thank you