Hi
I’m trying to using official image on our x86 devices, but wifi and 4g do not work. so i want to build kernel (branch is master) and update kernel.but it report this error:
root@localhost:/home/cyndent# snap info pc-kernel_4.4.0-161.189_i386.snap
path: "pc-kernel_4.4.0-161.189_i386.snap"
name: pc-kernel
summary: The Ubuntu generic Linux kernel
version: 4.4.0-161.189 kernel
build-date: today at 08:10 UTC
license: unset
description: |
This Ubuntu generic Linux kernel
type: kernel
root@localhost:/home/cyndent# snap list
Name Version Rev Tracking Publisher Notes
core 16-2.41 7712 stable canonical✓ core
pc 16.04-0.10 34 stable canonical✓ gadget
pc-kernel 4.4.0-157.185 259 stable canonical✓ kernel
root@localhost:/home/cyndent# snap install pc-kernel_4.4.0-161.189_i386.snap --devmode --dangerous
error: cannot perform the following tasks:
- Mount snap "pc-kernel" (unset) (cannot replace signed kernel snap with an unasserted one)
i use --devmode --dangerous to update kernel ,but it do not work.
If i need to make a new image by myself to update kernel?
if your original image was a local build using a locally built kernel as well, you can use snap install --dangerous <kernel snapfile> on the device… but as Ian said, this only works when your original image was already using a local kernel snap via the --extra-snaps option to ubuntu-image.
a locally built kernel snap will not have an .assert file, this gets generated only by the store on upload of a snap when the snap gets its gpg signature. snap ack ... only helps with official kernels downloaded from the store.
Hi ogra,
I updated my local installed kernel.snap version 1.0 with new local kernel.snap version 2.0.
The difference between old and new kernel.snap is version 1.0 and 2.0 in snapcraft.yaml.
Kernel version updated from 1.0 to 2.0 if “snap list” to check after auto reboot.
But kernel version changed back to 1.0 after 10 mins without reboot.
Is it reasonable? And how to avoid this?