all-snap image - Unable to successfully sideload kernel.snap

[Gunther Laure]

Hi!


I am struggling for days now trying to get a custom (or newer) kernel to boot on a amd64 (Atom) board (or in Virtual Box).

Currently the board is running the infamous https://people.canonical.com/~mvo/all-snaps/amd64-all-snap.img.xz image.


Today I stopped trying to get one of my kernel.snaps to work and downloaded a provided kernel.snap: http://cdimage.ubuntu.com/ubuntu-core/daily-preinstalled/current/xenial-preinstalled-core-amd64.kernel.snap


I could not install this one using sideloading:


ubuntu at localhost:~$ sudo snappy install xenial-preinstalled-core-amd64.kernel.snap
Installing xenial-preinstalled-core-amd64.kernel.snap
xenial-preinstalled-core-amd64.kernel.snap failed to install: package "canonical-pc-linux" is already installed with origin "canonical" your origin is "sideload"


So I unpacked it with unsquasfh:
unsquashfs ../xenial-preinstalled-core-amd64.kernel.snap

Changed the name in meta/snapcraft.yaml

and compressed it again:
mksquashfs squashfs-root test1.snap -noappend -comp xz -no-xattrs


I am installing the kernel.snap:
sudo snappy install test1.snap
Installing test1.snap

Name                  Date       Version      Developer
canonical-pc          2016-02-02 3.0          canonical
canonical-pc-linux    2016-03-21 4.4.0-14-1   canonical
custom-pc-linux-trion 2016-04-14 LWNSFLbcjhSj sideload
trionet               2016-04-06 LVdChFfSWTRn sideload
ubuntu-core           2016-03-08 16.04.0-24   canonical
Reboot to use custom-pc-linux-trion version LWNSFLbcjhSj.


But after the reboot I seem to be stuck in the initrd:
grep: /proc/device-tree/model: No such file or directory

After some time
findfs: unable to resolve 'LABEL=writeable'

cannot find 'writable' partition

BusyBox ...
(initramfs)


This is not board specific as I can reproduce the same behaviour in VirtualBox.

?Thanks for your help.

Bye Gunther

PS: The recovery function works good. The next reboot always find its way back to the default working kernel.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.ubuntu.com/archives/snappy-devel/attachments/20160415/92a53a97/attachment.html>