General :: Why Won't Allwinner A10 Kernel Boot

Jun 26, 2013

I am trying to use my cheap virtually unbrickable tablet to learn more about kernel development and eventually ROM building.

I have extracted the manufacturers (WoPad) LiveSuit image and used split_bootimg.pl to break up the boot image.

I extracted the config file from the kernel image using extract-ikconfig and it created a config file. I didn't see the config in /proc.

So, I have the factory ramdisk and the factory kernel config.

I have downloaded several kernel sources (lichee-3.0.8, ChritianTroy's 3.0.36, and another one from linux-sunxi 3.0.72). I can successfully compile all of them without errors and they all generate zImages, uImages, etc using the factory config as well as the sun4i_crane configs they come with.

When I repack the boot.img with the newly created kernel and install it on nandc it wont' boot past the android icon (u-boot). When I compare my boot.img to the factory one, they both have the same offset where the kernel starts (0x00000800). I have also ensured I'm replacing the kernel modules when I'm changing kernel versions.

Here is the line I'm using to repack the boot.img

Code:
mkbootimg --base 0x40000000 --pagesize 2048 --kernel zImage --ramdisk ramdisk-repack.cpio.gz --board sun4i --cmdline "console=ttyS0,115200 rw init=/init loglevel=8" -o boot.img

[Code]...

Also, I'm building on Ubuntu 13.04 with Google GCC 4.6 from the ndk. I have built kernels for other devices without issues.

General :: Why won't Allwinner A10 Kernel Boot


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General :: Boot Loop CM9 For Allwinner A10

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Got a T15A Generic tablet which has the same Hardware than protab 2 xxl, Goclever A103, Coby 1042 etc..how to get CM9 or CM10 running?

Code:
--------- beginning of /dev/log/main
I/cm ( 70): Welcome to Android 4.0.4 / CyanogenMod-9-20120721-UNOFFICIAL-907
I/cm ( 71): _
I/cm ( 72): __ __ _ ___ _ _ __ ___ __ _ _ _ _ __ __))
I/cm ( 73): ((_ (/'((_( ((( ((_)((_( (('((( ((`1( ((_)((_(
[code]....

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I am trying to port a kernel from one zte 8960 to another. I have cwm recover set up with kexec to get a log of what is going on. the kernel hangs at boot of the phone so I trying to find the cause

-last_kmsg after a failed boot of 3.4

pastebin.com/0AGpACsT

-last_kmsg after a boot of 3.0.8

pastebin.com/N3WtDHwC

-split-boot of boot.img

Code:
output directory: fi
boot_magic correct: ANDROID!
kernel size: 6045264
kernel address: 2149613568
Base: 2149580800 (hex): 0x80200000
[code]....

I am thinking it might had hit "un-allocated" memory area, I did have to change the ramdisk_offset from 0x01300000 to 0x02000000 make the kernel fit. what could I do to check to see if it is un-allocated space I am dealing with

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cp mediatek-configs .config
TARGET_PRODUCT=s9081 MTK_ROOT_CUSTOM=../mediatek/custom make
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MTK-Tools by Bruno MartinsMT65xx repack script (last update: 27-01-2013)
Repacking boot image...
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Here are the Warnings I got when compiling

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net/ipv4/tcp.c: In function 'tcp_nuke_addr':
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In file included from net/ipv4/netfilter/ipt_LOG.c:27:
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[code]....

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I recently acquired an A13 tablet and wanting to install CM10 on it I first installed CWM 6.0.2.8 according to the famous manual (if it's relevant I'll post the exact url). Anyway, it got stuck on CWM (doesn't boot normally). Now I figured it can't install since using 'adb shell' and looking at /proc/partitions -- nothing is there!
"""
cat /proc/partitions
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179 0 15558144 mmcblk0
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"""

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"""
ls /dev/block
loop0 loop2 loop4 loop6 mmcblk0 nandf ram0
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"""

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I've never been able to get the camera working its the single front camera it doesn't bother me its not very good

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caused & am now stuck in a recovery boot loop.

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I ve done both these mods with several apps and modding the build prop and I always get "sorry systemGUI has stopped", constantly - when you close it, it opens again straight away. Clearly settings doesnt like these mods, so I m trying to work what I need to change so it DOES accept them.

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