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debian06

Member

Registered: 2023-03-29

Posts: 2  

Grub problem after installing new Kernel

Devuan machine gets un-bootable after installing new kernel with upgrade.
I get error at boot
"error: symbol grub_disk_native_sectors not found"

I could solve the problem with live CD and grub-install command.
Guide here:
https://phoenixnap.com/kb/grub-rescue
boot-repair software was not available in Devuan repos.

What is the cause of this problem?

Last edited by debian06 (2023-03-29 10:43:33)

Marjorie

Member

From: Teignmouth, UK

Registered: 2019-06-09

Posts: 221  

Re: Grub problem after installing new Kernel

Is grub failing completely?
Usually you can successfully boot into the previous kernel from the grub menu.

debian06

Member

Registered: 2023-03-29

Posts: 2  

Re: Grub problem after installing new Kernel

Grub menu did not appear at all.
I got only this message:
error: symbol grub_disk_native_sectors not found

And grub prompt:
grub>

I failed to set root partition to any of the 3 partitions.
set root=(hd3,ext2)

Funny thing is that grub identified ext4 partition as ext2
it is where my /boot folder is located.

I think "apt upgrade" kernel spoils grub configuration.

rolfie

Member

Registered: 2017-11-25

Posts: 1,171  

Re: Grub problem after installing new Kernel

See https://dev1galaxy.org/viewtopic.php?id=5245

fsmithred

Administrator

Registered: 2016-11-25

Posts: 2,486  

Re: Grub problem after installing new Kernel

Run these commands at the grub prompt. Adjust the device names if I guessed wrong. Use tab-completion to get the version strings on kernel and initrd. Last command is 'boot' and press ENTER (or maybe ctrl-x).

set root=(hd3,msdos1)     # assuming the /boot partition is sdc1
linux /vmlinuz-<version> ro root=/dev/sdc2     # assuming the root partition is sdc2
initrd /initrd.img-<version>
boot

After you boot into the system, get a root terminal and run update-grub That should create a new boot menu.