Openhabian : how to update kernel?

hi

for openhabian 1.3
which is the right way to update the kernel ?

Ale

Release = Raspbian GNU/Linux 8 (jessie)

Kernel = Linux 4.9.35-v7+

Platform = Raspberry Pi 3 Model B Rev 1.2

apt-get dist-upgrade

But as with any major update, make sure you have a backup of your old system ready.

ty mstormi

the command reports : 0 update needed

the kernel 4.9.35 was released on 2017-06-29
how to update on something more recent ?

4.9 would be about right for Jessie, which is an older version Debian (Raspbian). You would need to upgrade to Stretch to use a newer kernel, but this can be an unstable process.

Why are you looking to upgrade?

Right. Please answer Benjy’s question first. If you still think you are in need of a newer kernel, I’d suggest to (re)install openHABian on another SD card, starting with the most current image. That one is stretch based which will give you a 4.14 kernel. Then migrate your OH config using openhab-cli backup/restore.

Hallo
Install rpi-update and run rpi-update, this will upgrade the kernel, firmware etc.

Better do not.
Best case nothing will happen but worst case this will install a kernel that the rest of your OS is incompatible with.

Hi Benjy
I think that if the software development has brought from the version .35 to the .134 through corrections, improvements, corrections of corrections, corrections of improvements… in a continuous development cycle, this leads me to think that version 4.4.134 is generically “better” than 4.4.35
Furthermore, later versions of the kernel reports “better support of RPI3 hardware” and general improvements on filesystem, scheduler and many other parts, this also leads me to think that a version 4.18 is generally “better” than a 4.4

Where am I wrong?

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Bottom line is openHABian is no general purpose OS but built for use in a specific HW/application combination. You shouldn’t change any of the components unless there is a need to. Belief in ‘it’s better’ is not a need.

You are correct, but it’d be up to you weigh the risks of upgrade with its benefits. Since openHABian is a raspbian variant, the way to do this would be the same as debian:

  1. Update all software to their latest version.
sudo apt update
sudo apt upgrade
sudo apt dist-upgrade
  1. Change all instances of jessie with stretch in /etc/apt/sources.list and the directory /etc/apt/sources list.d/

  2. Upgrade the OS

sudo apt update
sudo apt upgrade
sudo apt dist-upgrade

http://baddotrobot.com/blog/2017/10/26/upgrade-raspian-jessie-to-stretch/

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thank you both

I will evaluate a passage to stretch in the future, for now I stay with the current system

bye
Ale

If I may jump in with a related query here:

My Openhabian 2.3.0-1 running on a Raspi 2 with kernel 4.14.62-v7+ #1134 will not load a module for a USB CSR4.0 device.

On another machine btusb loads so a FS search shows that btusb is available at
/lib/modules/4.14.79-v7+/kernel/drivers/bluetooth/btusb.ko
/lib/modules/4.14.79+/kernel/drivers/bluetooth/btusb.ko

So should I install a later kernel to get a suitable module or must I go the compile route for a new module?

Hmm, 4.14.62 is pretty up to date (latest ‘longterm’ is 4.14.82) so must be something fairly experimental you want to use I guess. Honestly I don’t know what to advise. I wouldn’t risk breaking things so I’d go compile. Or clone your system and try on another box first.

Thanks Markus. A reboot was required to get the bluetooth utils working and now btusb is registered and device is working. No compiling required.