[GRUB] something unexpected after an update.

[RobertoAC]

Hello, recently I got the following message after updating.
I wanted to know what it is.

[Schwarzer Kater]

See: https://askubuntu.com/questions/1414...her-bootable-p

If you have more than one operating system installed on your computer (e.g. Kubuntu and Windows) it is a good idea to set/add GRUB_DISABLE_OS_PROBER=false in /etc/default/grub and sudo update-grub afterwards so they are all shown in the GRUB boot menu.

Eiher use Kate to change/add the GRUB_DISABLE_OS_PROBER entry or use nano or vim in Konsole .
Or just run the following command in Konsole:

sudo cp /etc/default/grub /etc/default/grub.orig && echo -e "\n# Set to false to let GRUB look for other operating systems (default in *ubuntu is true)\nGRUB_DISABLE_OS_PROBER=false\n" | sudo tee -a /etc/default/grub && sudo update-grub

A backup of your old grub (named grub.orig) is made in /etc/default/ by this command and afterwards the changes are applied to grub.

[jlittle]

If you are referring to the memtest86+ message, that's been happening since UEFI.

The OS prober message is common; I get it on my desktop kinetic Kubuntu. It is now the default outcome on new installs unless /etc/default/grub is edited to have the line GRUB_DISABLE_OS_PROBER=false. It also happens on old installs if the prober hasn't found something in the past. This weird double negative is because the OS prober used to run automatically, for at least a decade, and this was deemed to be a security risk; I imagine some bad hat could poke a tiny USB stick into a port, or add one on the end of a keyboard cable, that the OS prober would find and set up a grub entry to compromise things.

(IMO it's far, far less trouble to give up on this error-prone grub-mkconfig machinery, and manually edit a simplified /boot/grub/grub.cfg. Standard grub doesn't cope with btrfs anyway, AFAIK.)

[RobertoAC]

Thanks for You answer, I don't hace Another operating system.

[claydoh]

The message is not new, but you will only see it when updating grub - kernel updates mainly, I believe was put there mostly due to the change the Grub developers made, which would cause a lot of confused/upset/annoyed people and tons unnecessary bug reports.

If you are referring to the memtest86+ message, that's been happening since UEFI.

This may change some day soonish

[RobertoAC]

So I shouldn't worry that something happened that affects?

[claydoh]

So I shouldn't worry that something happened that affects?

No
This is normal and expected messaging.