Beagleboard with ARM processor: How to change the kernel boot order in Ubuntu 14.04

[xxlray]

I use Ubuntu 14.04 and need a custom kernel as I am running it on a beagleboard. The standard kernel in this board is (currently) vmlinuz-3.8.13-bone54 but I need a modified one that loads the virtual ethernet module to be able to run linux containers.
I compiled a new kernel and tried to install it by
dpkg -i ~ubuntu/stable-kernel/deploy/linux-image-3.9.11-x5_1.0cross_armhf.deb
dpkg -i ~ubuntu/stable-kernel/deploy/linux-headers-3.9.11-x5_1.0cross_armhf.deb
Now /boot/ contains vmlinuz-3.9.11-x5 and vmlinuz-3.8.13-bone54 (amongst other stuff). Unfortunately the system still boots vmlinuz-3.8.13-bone54 by default.
$ uname -r
3.8.13-bone54
How do I change the default kernel in Ubuntu 14.04 as there seems to be no update-grub and no /etc/default/grub any more?

[Bucky Ball]

Well,


sudo update-grub

... is still alive and well (unless you're using Lilo or something else rather than grub of course). Try running that in a terminal. Post any error message back here.

[sudodus]

You can

1. copy and paste (with superuser privileges) the relevant


menuentry {
...
...
...
}

section in /boot/grub/grub.cfg

into (the end of) /etc/grub.d/40_custom

2. rename /etc/grub.d/40_custom to a name that will be found before 10_linux, for example


sudo mv /etc/grub.d/40_custom /etc/grub.d/07_custom

3. Make it active (copied into a new version of /boot/grub/grub.cfg) with the command


sudo update-grub

[xxlray]

$ sudo update-grub
sudo: update-grub: command not found

$ sudo ls /boot/grub
ls: cannot access /boot/grub: No such file or directory
So maybe the standard image for this board uses a different boot manager. Is there a way to find out?

[sudodus]

Are you running the system you are asking about, or are you running from a live system?

What output do you get from the following commands?


sudo find / -name grub

sudo find / -name grub.cfg

[sudodus]

Maybe you are booting with lilo? How did you install Ubuntu? What image did you use? Is there some information about it, where you found it? Or is it a dual boot or wubi system with Windows and booting somehow via Windows?

[xxlray]

The beagleboard is somehoe similar to a Rasberry Pie (if that information helps) and has an ARM processor. I installed the pre-compiled OS image from http://elinux.org/BeagleBoardUbuntu#Trusty_14.04
Afterwards I log in via SSH, download kernel sources, modify the .config, compile the kernel and install the resulting .deb packages like described above.

The find commands don't bring up any result.

[sudodus]

I think you have another boot loader. I have no own experience of lilo, but you can search for it in a similar way as you were searching for grub


sudo find / -name "lilo*"

[xxlray]

Nope - lilo content seems to only be in some linux containers. I will try to reach out to the developers.
$ sudo find / -name "lilo*"
/var/cache/lxc/trusty/rootfs-armhf/usr/share/vim/vim74/syntax/lilo.vim
/var/lib/lxc/testcontainer1/rootfs/usr/share/vim/vim74/syntax/lilo.vim
Could there be another boot loader? The OS is on a micro SD card if that helps.

[sudodus]

Yes, probably there is another boot loader. I must admit that I don't know. Let us hope that someone who knows can chip in and help you. Maybe it helps to attract people who know, if I edit the title of your thread to mention beagleboard and ARM.

[xxlray]

It seems to use a bootloader called u-boot but I couldn't find out how to define the proper kernel for boot yet.