How to completely remove a recent kernel installaton?

Rocky Linux Help & Support
1

Hello
Following a kernel upgrade from 8.9 to 8.10,
kernel-4.18.0-553.el8_10.x86_64
is offered as the latest kernel. Yet when I choose this kernel, the screen goes black and I have to crash the machine. I can restart on
kernel-4.18.0-513.24.1.el8_9.x86_64
without issue.
I used

sudo yum remove kernel-4.18.0-553.el8_10.x86_64

but it has not removed the kernel from the startup list.
Is there a way to completely remove kernel-4.18.0-553.el8_10.x86_64 and no longer have it was as an option on the startup list, so I can attempt a new upgrade?
Thank you

2

The package kernel does not contain any files. It simply requires the “real” kernel packages.

Run dnf rq --installonly
You should see some more kernel*-4.18.0-553.el8_10.x86_64 packages.

Run ls /boot/loader/entries/
The files you see, do define (some of) the entries that the startup list shows.

Removal of kernel packages should remove corresponding entry file too.

3

I get the below with some strange php error (that shows up every so often. not sure how to resolve it).

sudo dnf rq --installonly
[sudo] password for admin: 
Modular dependency problem:

 Problem: conflicting requests
  - nothing provides module(httpd:2.4) needed by module php:7.2:8040020210530192442:02bae935.x86_64 from @modulefailsafe
  - nothing provides module(nginx) needed by module php:7.2:8040020210530192442:02bae935.x86_64 from @modulefailsafe
kernel-0:4.18.0-513.18.1.el8_9.x86_64
kernel-0:4.18.0-513.24.1.el8_9.x86_64
kernel-0:4.18.0-553.el8_10.x86_64
kernel-core-0:4.18.0-513.18.1.el8_9.x86_64
kernel-core-0:4.18.0-513.24.1.el8_9.x86_64
kernel-core-0:4.18.0-553.el8_10.x86_64
kernel-devel-0:4.18.0-513.18.1.el8_9.x86_64
kernel-devel-0:4.18.0-513.24.1.el8_9.x86_64
kernel-devel-0:4.18.0-553.el8_10.x86_64
kernel-modules-0:4.18.0-513.18.1.el8_9.x86_64
kernel-modules-0:4.18.0-513.24.1.el8_9.x86_64
kernel-modules-0:4.18.0-553.el8_10.x86_64


sudo yum remove kernel-4.18.0-553.el8_10.x86_64
[sudo] password for admin: 
Modular dependency problem:

 Problem: conflicting requests
  - nothing provides module(httpd:2.4) needed by module php:7.2:8040020210530192442:02bae935.x86_64 from @modulefailsafe
  - nothing provides module(nginx) needed by module php:7.2:8040020210530192442:02bae935.x86_64 from @modulefailsafe
Dependencies resolved.
=====================================================================================================================================================
 Package                         Architecture                    Version                                      Repository                        Size
=====================================================================================================================================================
Removing:
 kernel                          x86_64                          4.18.0-553.el8_10                            @baseos                            0  

Transaction Summary
=====================================================================================================================================================
Remove  1 Package

Freed space: 0  
Is this ok [y/N]: y
Running transaction check
Transaction check succeeded.
Running transaction test
Transaction test succeeded.
Running transaction
  Preparing        :                                                                                                                             1/1 
  Erasing          : kernel-4.18.0-553.el8_10.x86_64                                                                                             1/1 
  Running scriptlet: kernel-4.18.0-553.el8_10.x86_64                                                                                             1/1 
  Verifying        : kernel-4.18.0-553.el8_10.x86_64                                                                                             1/1 

Removed:
  kernel-4.18.0-553.el8_10.x86_64                                                                                                                    

Complete!
(base) [admin@LOWROCKY ~]$ sudo yum remove kernel-core-0:4.18.0-553.el8_10.x86_64
Modular dependency problem:

 Problem: conflicting requests
  - nothing provides module(httpd:2.4) needed by module php:7.2:8040020210530192442:02bae935.x86_64 from @modulefailsafe
  - nothing provides module(nginx) needed by module php:7.2:8040020210530192442:02bae935.x86_64 from @modulefailsafe
Dependencies resolved.
=====================================================================================================================================================
 Package                            Architecture               Version                                             Repository                   Size
=====================================================================================================================================================
Removing:
 kernel-core                        x86_64                     4.18.0-553.el8_10                                   @baseos                      71 M
Removing dependent packages:
 kernel-modules                     x86_64                     4.18.0-553.el8_10                                   @baseos                      25 M
 kmod-kvdo                          x86_64                     6.2.8.7-94.el8                                      @baseos                     1.8 M
 kmod-stex                          x86_64                     6.02.0000.01-3.el8_10.elrepo                        @elrepo                      67 k
 vdo                                x86_64                     6.2.9.7-14.el8                                      @baseos                     3.3 M

Transaction Summary
=====================================================================================================================================================
Remove  5 Packages

Freed space: 101 M
Is this ok [y/N]: y
Running transaction check
Transaction check succeeded.
Running transaction test
Transaction test succeeded.
Running transaction
  Preparing        :                                                                                                                             1/1 
  Running scriptlet: kmod-stex-6.02.0000.01-3.el8_10.elrepo.x86_64                                                                               1/1 
  Running scriptlet: kmod-stex-6.02.0000.01-3.el8_10.elrepo.x86_64                                                                               1/5 
  Erasing          : kmod-stex-6.02.0000.01-3.el8_10.elrepo.x86_64                                                                               1/5 
  Running scriptlet: kmod-stex-6.02.0000.01-3.el8_10.elrepo.x86_64                                                                               1/5 
depmod: WARNING: /lib/modules/4.18.0-513.18.1.el8_9.x86_64/extra/uapfs.ko.xz needs unknown symbol ufsd_readahead_gfp_mask
depmod: ERROR: fstatat(4, nvidia-drm.ko.xz): No such file or directory
depmod: ERROR: fstatat(4, nvidia-modeset.ko.xz): No such file or directory
depmod: ERROR: fstatat(4, nvidia-peermem.ko.xz): No such file or directory
depmod: ERROR: fstatat(4, nvidia-uvm.ko.xz): No such file or directory
depmod: ERROR: fstatat(4, nvidia.ko.xz): No such file or directory
depmod: WARNING: /lib/modules/4.18.0-513.24.1.el8_9.x86_64/extra/uapfs.ko.xz needs unknown symbol ufsd_readahead_gfp_mask
depmod: WARNING: /lib/modules/4.18.0-553.el8_10.x86_64/kernel/external/uapfs/uapfs.ko needs unknown symbol ufsd_readahead_gfp_mask

  Running scriptlet: vdo-6.2.9.7-14.el8.x86_64                                                                                                   2/5 
  Erasing          : vdo-6.2.9.7-14.el8.x86_64                                                                                                   2/5 
  Running scriptlet: vdo-6.2.9.7-14.el8.x86_64                                                                                                   2/5 
  Running scriptlet: kmod-kvdo-6.2.8.7-94.el8.x86_64                                                                                             3/5 
  Erasing          : kmod-kvdo-6.2.8.7-94.el8.x86_64                                                                                             3/5 
  Running scriptlet: kmod-kvdo-6.2.8.7-94.el8.x86_64                                                                                             3/5 
depmod: WARNING: /lib/modules/4.18.0-553.el8_10.x86_64/kernel/external/uapfs/uapfs.ko needs unknown symbol ufsd_readahead_gfp_mask

  Erasing          : kernel-modules-4.18.0-553.el8_10.x86_64                                                                                     4/5 
  Running scriptlet: kernel-modules-4.18.0-553.el8_10.x86_64                                                                                     4/5 
  Running scriptlet: kernel-core-4.18.0-553.el8_10.x86_64                                                                                        5/5 
dkms: removing: nvidia 555.42.02 (4.18.0-553.el8_10.x86_64) (x86_64)
Module nvidia-555.42.02 for kernel 4.18.0-553.el8_10.x86_64 (x86_64).
Before uninstall, this module version was ACTIVE on this kernel.
Removing any linked weak-modules
depmod: WARNING: /lib/modules/4.18.0-553.el8_10.x86_64/kernel/external/uapfs/uapfs.ko needs unknown symbol ufsd_readahead_gfp_mask

nvidia.ko.xz:
 - Uninstallation
   - Deleting from: /lib/modules/4.18.0-553.el8_10.x86_64/extra/
 - Original module
   - No original module was found for this module on this kernel.
   - Use the dkms install command to reinstall any previous module version.

nvidia-modeset.ko.xz:
 - Uninstallation
   - Deleting from: /lib/modules/4.18.0-553.el8_10.x86_64/extra/
 - Original module
   - No original module was found for this module on this kernel.
   - Use the dkms install command to reinstall any previous module version.

nvidia-drm.ko.xz:
 - Uninstallation
   - Deleting from: /lib/modules/4.18.0-553.el8_10.x86_64/extra/
 - Original module
   - No original module was found for this module on this kernel.
   - Use the dkms install command to reinstall any previous module version.

nvidia-uvm.ko.xz:
 - Uninstallation
   - Deleting from: /lib/modules/4.18.0-553.el8_10.x86_64/extra/
 - Original module
   - No original module was found for this module on this kernel.
   - Use the dkms install command to reinstall any previous module version.

nvidia-peermem.ko.xz:
 - Uninstallation
   - Deleting from: /lib/modules/4.18.0-553.el8_10.x86_64/extra/
 - Original module
   - No original module was found for this module on this kernel.
   - Use the dkms install command to reinstall any previous module version.
depmod...

  Erasing          : kernel-core-4.18.0-553.el8_10.x86_64                                                                                        5/5 
warning: file /lib/modules/4.18.0-553.el8_10.x86_64/updates: remove failed: No such file or directory

  Running scriptlet: kernel-core-4.18.0-553.el8_10.x86_64                                                                                        5/5 
  Verifying        : kernel-core-4.18.0-553.el8_10.x86_64                                                                                        1/5 
  Verifying        : kernel-modules-4.18.0-553.el8_10.x86_64                                                                                     2/5 
  Verifying        : kmod-kvdo-6.2.8.7-94.el8.x86_64                                                                                             3/5 
  Verifying        : kmod-stex-6.02.0000.01-3.el8_10.elrepo.x86_64                                                                               4/5 
  Verifying        : vdo-6.2.9.7-14.el8.x86_64                                                                                                   5/5 

Removed:
  kernel-core-4.18.0-553.el8_10.x86_64                    kernel-modules-4.18.0-553.el8_10.x86_64           kmod-kvdo-6.2.8.7-94.el8.x86_64          
  kmod-stex-6.02.0000.01-3.el8_10.elrepo.x86_64           vdo-6.2.9.7-14.el8.x86_64                        

Complete!

sudo yum remove kernel-modules-0:4.18.0-553.el8_10.x86_64
Modular dependency problem:

 Problem: conflicting requests
  - nothing provides module(httpd:2.4) needed by module php:7.2:8040020210530192442:02bae935.x86_64 from @modulefailsafe
  - nothing provides module(nginx) needed by module php:7.2:8040020210530192442:02bae935.x86_64 from @modulefailsafe
No match for argument: kernel-modules-0:4.18.0-553.el8_10.x86_64
No packages marked for removal.
Dependencies resolved.
Nothing to do.
Complete!

sudo yum remove kernel-devel-0:4.18.0-553.el8_10.x86_64
Modular dependency problem:

 Problem: conflicting requests
  - nothing provides module(httpd:2.4) needed by module php:7.2:8040020210530192442:02bae935.x86_64 from @modulefailsafe
  - nothing provides module(nginx) needed by module php:7.2:8040020210530192442:02bae935.x86_64 from @modulefailsafe
Dependencies resolved.
=====================================================================================================================================================
 Package                              Architecture                   Version                                   Repository                       Size
=====================================================================================================================================================
Removing:
 kernel-devel                         x86_64                         4.18.0-553.el8_10                         @baseos                          53 M

Transaction Summary
=====================================================================================================================================================
Remove  1 Package

Freed space: 53 M
Is this ok [y/N]: y
Running transaction check
Transaction check succeeded.
Running transaction test
Transaction test succeeded.
Running transaction
  Preparing        :                                                                                                                             1/1 
  Erasing          : kernel-devel-4.18.0-553.el8_10.x86_64                                                                                       1/1 
  Verifying        : kernel-devel-4.18.0-553.el8_10.x86_64                                                                                       1/1 

Removed:
  kernel-devel-4.18.0-553.el8_10.x86_64                                                                                                              

Complete!

sudo dnf rq --installonly
Modular dependency problem:

 Problem: conflicting requests
  - nothing provides module(httpd:2.4) needed by module php:7.2:8040020210530192442:02bae935.x86_64 from @modulefailsafe
  - nothing provides module(nginx) needed by module php:7.2:8040020210530192442:02bae935.x86_64 from @modulefailsafe
kernel-0:4.18.0-513.18.1.el8_9.x86_64
kernel-0:4.18.0-513.24.1.el8_9.x86_64
kernel-core-0:4.18.0-513.18.1.el8_9.x86_64
kernel-core-0:4.18.0-513.24.1.el8_9.x86_64
kernel-devel-0:4.18.0-513.18.1.el8_9.x86_64
kernel-devel-0:4.18.0-513.24.1.el8_9.x86_64
kernel-modules-0:4.18.0-513.18.1.el8_9.x86_64
kernel-modules-0:4.18.0-513.24.1.el8_9.x86_64

kernel-0:4.18.0-553.el8_10.x86_64 no longer shows up in the kernel start up list on restart and amazingly NVIDIA still works on the older kernels. Thank you very much for this solution.

4

You could try:

dnf module reset php

either that or the same for httpd and nginx as well. PHP 7.2 isn’t natively available on Rocky 9, only PHP 8.x.

1 Like
5

Well, your command line did the trick perfectly. I no longer have the error.
What a great morning for me. Thank you so much.

1 Like
6

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