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-   -   upgrade to kernel 5.4.13 not working (https://www.linuxquestions.org/questions/slackware-14/upgrade-to-kernel-5-4-13-not-working-4175668064/)

karthik_holla 01-20-2020 06:50 AM
upgrade to kernel 5.4.13 not working
 
Hello,
I upgraded my system to kernel-5.4.13 and after reboot the system hangs saying
" Loading kernel vmlinuz... Done "
I am using elilo and have copied the new vmlinuz file to /boot/efi/EFI/Slackware.
And tried mounting with a usb and running eliloconfig command too

Thanks

ehartman 01-20-2020 07:21 AM
Quote:
Originally Posted by karthik_holla (Post 6080638)
I am using elilo and have copied the new vmlinuz file to /boot/efi/EFI/Slackware.
And did you generate a new initrd (initial ram disk) too and copied that to the EFI directory? The one there probably is still from your old kernel, so doesn't have the right modules to access your root disk/fs. The package only contains the kernel (and config, System.map) itself as the initrd is installation-dependant.
But it is required for the generic kernel, the huge one often can do without, if your hardware is reasonably standard (and the root fs is one of the ext? varieties).

karthik_holla 01-20-2020 08:24 AM
Thanks i forgot to do initrd.
Now i booted using a usb and created initrd using
" mkinitrd -c -k 5.4.13 -m ext4 -f ext4 -r /dev/sda4 "
It gave some errors like /proc/devices/ file not found and created the initrd.gz file.
I copied the file to efi folder too but still not working.

phenixia2003 01-20-2020 08:41 AM
Hello,

Quote:
Originally Posted by karthik_holla (Post 6080672)
Thanks i forgot to do initrd.
Now i booted using a usb and created initrd using
" mkinitrd -c -k 5.4.13 -m ext4 -f ext4 -r /dev/sda4 "
It gave some errors like /proc/devices/ file not found and created the initrd.gz file.
I copied the file to efi folder too but still not working.
I guess that in addition to ext4 module, other are required for your system.

You can run (as root) the following command to get the recommended mkinitrd command line to run for your system.

Code:
$ /usr/share/mkinitrd/mkinitrd_command_generator.sh -k 5.4.13
--
SeB

Alien Bob 01-20-2020 08:44 AM
Quote:
Originally Posted by karthik_holla (Post 6080672)
It gave some errors like /proc/devices/ file not found and created the initrd.gz file.
I copied the file to efi folder too but still not working.
When you boot from an external medium, be sure to (bind-) mount the relevant filesystems (not just your physical disk partitions but also /dev /proc and /sys) and do a chroot before you create the initrd.
Read https://docs.slackware.com/howtos:sl...oot_from_media for instance.

karthik_holla 01-20-2020 09:31 AM
Thanks. This was my procedure but than too it hangs
Code:
mount /dev/sda4 /mnt
        mount /dev/sda1 /mnt/boot/efi

mount -o bind /dev /mnt/dev
mount -o bind /proc /mnt/proc
mount -o bind /sys /mnt/sys

chroot /mnt
Then
Code:
./usr/share/mkinitrd/mkinitrd_command_generator.sh -k 5.4.13
Then executed mkinitrd (this time without any errors) as suggested by the generator
Then i copied initrd.gz

garpu 01-20-2020 09:52 AM
Did you keep your old kernel around? You can boot with that, run mkinitrd with -k to the correct kernel, then copy the initrd.gz to /boot/efi/EFI/Slackware/. Or you can install the huge kernel when you're booted with USB, reboot, and fix your old one.

karthik_holla 01-20-2020 11:13 AM
Slackpkg upgrade will remove old kernel i guess.

ehartman 01-20-2020 01:06 PM
Quote:
Originally Posted by karthik_holla (Post 6080731)
Slackpkg upgrade will remove old kernel i guess.
If you didn't blacklist that, yes.
But I do not know if slackpkg removes the ones in the EFI tree too, I never use it myself, I only selectively update from my own mirror, so all packages are available local.

mumahendras3 01-20-2020 02:08 PM
Quote:
Originally Posted by ehartman (Post 6080797)
But I do not know if slackpkg removes the ones in the EFI tree too
No, it doesn't. slackpkg only removes those directly under /boot.

karthik_holla 01-21-2020 06:42 AM
Any other way to recover my system ?

mumahendras3 01-21-2020 07:35 AM
You can try downgrading to older kernel. Download the older kernel here: https://slackware.uk/cumulative/slac...slackware64/a/

Alien Bob 01-21-2020 07:41 AM
Quote:
Originally Posted by karthik_holla (Post 6081112)
Any other way to recover my system ?
What exactly is the status and the remaining issue now? Errors etc?

karthik_holla 01-21-2020 07:49 AM
It just says
Code:
Loading kernel vmlinuz....done
And hangs

Alien Bob 01-21-2020 07:55 AM
Quote:
Originally Posted by karthik_holla (Post 6081140)
It just says
Code:
Loading kernel vmlinuz....done
And hangs
Did you copy that initrd file to the correct location on the EFI partition? And does your elilo.conf mention both the correct kernel name AND the correct initrd filename? I suspect not.


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