ubuntu-phone team mailing list archive

[Daniel Holbach <daniel.holbach@xxxxxxxxxx>]

Hey Florian,

On 29.07.2013 18:31, Florian Will wrote:
> I've ported Ubuntu Touch with "flipped" containers (booting directly
> into Ubuntu) to the Desire Z. First of all, thanks to #ubuntu-touch and
> especially Oliver Grawert for helping me with some of the issues I
> encountered. Device specific code is by the Andromadus team from XDA
> Developers since there's no official CyanogenMod for this device. You
> can check the port out at [1], it's linked as "flipped_vision" and the
> page has some installation instructions / status information.
> 
> There's also the "unflipped" Port with less bugs and more
> device-specific features by utopykzebulon.


Great work! Thanks a lot!


> Although I have almost no experience with kernel building and low-level
> things, here is my general advice for porting the flipped stuff:
>  * There are apparently two different approaches for mounting the
> flipped images, and it seems like my port uses the old-style approach.
>  * The android_build repository on phablet.ubuntu.com has all the
> required changes to create the android zip file. It downloads files for
> a generic initramfs and puts them in
> "out/target/product/devicename/ubuntu-root". I think that changes to
> those files are not automatically put back into the ramdisk. (I've added
> an additional step to repack the ramdisk after changing the ubuntu-root/
> dir contents.) That ramdisk is then used to create boot.img instead of
> the cyanogenmod ramdisk (which is used for android-boot.img).
>  * The "scripts/touch" file in the ramdisk needs to figure out the data
> partititon's device file name (like /dev/foo). It might fail for your
> device and cause the boot process to fail. I've hard-coded the device
> path for the Desire Z for now, maybe we can set this in the device
> config at build time later.
>  * If the initramfs script has problems finding the data partition, then
> /usr/lib/lxc-android-config/update-fstab could have problems too.
>  * /etc/init/lxc-android-boot.conf might be interesting as well.
>  * The Ubuntu rootfs needs a udev rules file for your device. Check the
> /usr/lib/lxc-android-config/70-*.rules files as an example. You can
> create that file by looking at the ueventd*.rc files for your device
> from cyanogenmod and transforming the /dev/ settings to udev syntax.
>  * There are some requirements for the kernel config. For example, I had
> boot failures before I enabled CONFIG_VT=y and CONFIG_VT_CONSOLE=y.
>  * It's a good idea to check dmesg, logcat (you need to android-chroot
> first) and the various log files in /var/log/upstart if there are problems.

Would you mind adding your notes to
https://wiki.ubuntu.com/Touch/PortingFlippedInProgress? It'd be great if
we could collect information collectively and update the guide to the
new world order together. :-)

Have a great day,
 Daniel


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