how much partition is needed in sdcard to boot android4.2 in A20 board..

[Punith]

Hi,

i downloaded android4.2 img file from this link:

https://docs.google.com/file/d/0B-bAEPML8fwlUFd5OHVOaFJIRmc/edit.

i fallow this link  to flash in to sdcard(through phoenix suit).

https://www.olimex.com/wiki/A20-OLinuXino-MICRO

which is working fine.

With same image file ,i fallowed procedure in the link:

http://linux-sunxi.org/Boot_Android_from_SdCard#Extract_file_from_Android_Image.

but getting hanged at boot log.

sometimes it is repeated execution of services. and sometimes kernel panic error.

like
[   21.985909] init: waitpid returned pid 1509, status = 00000009
[   21.986200] init: Created socket '/dev/socket/zygote' with mode '660', user '0', group '1000'
[   22.002237] init: untracked pid 1509 exited
[   22.789111] ------------[ cut here ]------------
[   22.794328] kernel BUG at include/linux/mm.h:792!
[   22.799609] Internal error: Oops - BUG: 0 [#1] PREEMPT SMP ARM

kindly suggest me, what will be wrong in second procedure.

Regards
Punith

[JohnS]

Is that image designed for the board you're using?

If no, that's your problem.

John

[Punith]

Hi John,

With my source code also , i am getting same error.

So i feel, it is because sd card partition is issue.

Kindly tell me , how to prepare sdcard to boot android4.2.

Regards
Punith

[JohnS]

Start from one that is known to work.

john

[Punith]

Hi John,

In first method , sd card partitions are like this.

Partition     Start Sector     Num Sectors     Type
    1              3973120         3769343       b
    2                73728           32768       6
    3                    1         3973120      85 Extd
    5               106496           32768      83
    6               139264           32768      83
    7               172032         1048576      83
    8              1220608         1048576      83
    9              2269184           32768      83
   10              2301952           65536      83
   11              2367488         1048576      83
   12              3416064          524288      83
   13              3940352           32768      83

i tried this method but this dont work.

Regards
Punith

[wiesel24]

Hi guys,

i got the same experience with my A20 board on Android. It seems that android is very unstable on this board. Sometimes it hangs after certain minutes (screen freeze with little sprites on it, no reaction to any input) or it boots up with a freeze.

I don`t know how to fix this. I also got no Usb devices connected that may incompatible with android.

I flashed this image A20_SD_android_422_Phoenix_TS_USB_UART_I2C_WIFI_LAN_HDMI_LCD_800x480_release_1.img on micro SD what I've found on the official OLIMEX wiki page.

Any help?

Greetings
wiesel24

[JohnS]

Where is it on Olimex wiki?  Search finds nothing by that name.

John

[wiesel24]

https://www.olimex.com/wiki/A20-OLinuXino-MICRO#Android there are two links. One is for the NAND Version of A20 Board and the other is for the SD Card.

Greetings 

[JohnS]

I see lots of links.  Which one?  Some are A13...

John

[wiesel24]

A13 means only the A13 Touchscreens, so olimex didn't made different TS for A20. But these links are for A20 board with A13 Touchscreens. They are linked to https://docs.google.com/file/d/0B-bAEPML8fwlUFd5OHVOaFJIRmc/edit for A20 board with A13 7" TS SD-Card Image or to https://docs.google.com/file/d/0B-bAEPML8fwlc1F6TkNIcmlWcjQ/edit for A20 board with A13 10" TS SD-Card Image.

Greets
Wiesel

[JohnS]

A20 probably needs something different, it's a dual CPU and look at the error.

Are you using the right U-boot and so on?  Something like that is clearly wrong.

John

[rzr]

isnt A20_SD_android_422_Phoenix_TS_USB_UART_I2C_WIFI_LAN_HDMI_LCD_800x480_release_1.img 509M file
for OLinuXino-A20 ?

what format is it ? parted does not list partitions (msdos or gpt?)