ac100 team mailing list archive

[Gilles Grandou <gilles@xxxxxxxxxxx>]

Hello,

Le 26/06/2011 19:03, Göran Säter a écrit :
> Hi!
>
> I have bought a Toshiba ac100-10d (skandinavian model), which I would
> like to run ubuntu on but it does not work for me. My intention is to
> run ubuntu on a 32Gb sd-card, so it is possible to unplug the SD-card
> and then run Android also.
>
> I got following equipment , Toshiba ac100-10d, a PC with Kubuntu 10.10,
> SD-card 32Gb and a cable usb -> mini usb. I have installed tegra4linux
> at my PC
>
> When I read the README file at http://ac100.gudinna.com/internal/README
> I understand that I don't need to load
> tegra-2.6.29-arm2-ac100-internal-boot.img to my Ac100 via tegra4linux,
> when I will run Ubuntu from SD-card.
>
> Is thart correct ?
>
> I have done following steps during installation.
>
>    1.
>
>       Load egra-2.6.29-arm2-ac100-boot.img to AC100 with.
>
> sudo LD_LIBRARY_PATH=. ./nvflash --bl ../prebuilt/fastboot.stock.bin
> --download 5 tegra-2.6.29-arm2-ac100-boot.img
>
>    2.
>
>       Plugin SD-card at the PC and format it with ext3.
>
>       |sudo mkfs.ext3 /dev/sd||b||1|
>
>    3.
>
>       |Mount the reacently format SD-card.|
>
>       |sudo mount -t ext3 /dev/sdb1 /mnt/sdcard|
>
>    4.
>
>       Install Ubuntu at the SD-card, I download tegra-rootfs.tgz from
>       http://ac100.gudinna.com/tegra-rootfs.tgz.
>
>       sudo tar xzvf tegra-rootfs.tgz --numeric-owner -C /mnt/sdcard
>
> Then I umount the SD-card, plugit in my Toshiba and then start my
> Toshiba and the it boots up with Android. Have i miss something when I
> tried to install Ubuntu or have I done something wrong?

Your steps look quite correct, but the README assumes that Android 2.1 
is installed on your AC100 (2.2 came later...).

The android 2.1 bootloader uses 2 boot partitions:
* the normal one (identified as part6 from nvflash). It's the one on 
which you boot Android by default.
* the recovery one (part5) which is used when you press the HOME key 
upon power up. It's normally used by Android to reinstall the system.

It seems that you have used the partition #5 (nvflash --download 5 ...) 
so, only if your Android system is 2.1, you have to:
1- press the power button
2- wait the blank power light to be active
3- press and maintain the HOME key.
4- wait for the recovery message to appear on the screen, instead of the 
red toshiba logo screen
5- press the 1 key
6- if everything is fine, the kernel should boot the ubuntu system on 
your sdcard.

Android 2.2 is different:
* only the partition #6 is used
* Pressing Home key boots part6 as well, but an additionnal parameter is 
added to the boot command line (which doesn't really help you).
* Part 5 is now useless

So if your AC100 is running 2.2, you're left with two options:
* install Ubuntu boot image on part 6 instead of part 5. This means that 
ubuntu will boot by default, but you will loose Android, unless you 
install back the android boot image.
* install back Android 2.1 on your ac100.

And final words:
Always make backups of your ac100 before doing anything else!
It's basically impossible to brick or destroy your ac100 by playing with 
nvflash and/or ubuntu, but only if you have backups of your system to 
restore it (and if you know how to do it, but you can always find 
someone who know, just ask here or on irc...)

Hope this helps,
Gilles.