Same when running

zypper purge-kernels

Any reason why it should do anything?

What is /etc/zypp/multiversion.d and where it is documented?

It is documented in zypp.conf:

##
## Defining directory which may contain additional multiversion definitions.
##
## If the directory exists, each file in this directory is scanned, expecting
## one valid multiversion list entry per line. Empty lines and lines starting
## with '#' are ignored.
## ------------------------- [/etc/zypp/multiversion.d/example file begin] -----------------------
## # An alternate way to enable kernel packages being
## # installed in parallel:
##
## provides:multiversion(kernel)
## ------------------------- [/etc/zypp/multiversion.d/example file end] -----------------------
##
## Valid values: A directory
## Default value: {configdir}/multiversion.d
##
## multiversiondir = /etc/zypp/multiversion.d

Your file is, however, not in this format.

Also you did not say why do you expect purge-kernels to do anything in particular.

- you run purge-kernels
- you set up multiversion

Both points are fine. But this report lacks all informations which explain what the problem is.

- how many kernels are actaully installed?
- what do you expect from purge-kernels?
- what do you expect from purge-kernels when there are no kernels to purge at all?
- what is the actual error?


purge-kernels only removes all excess kernels that are not defined in any multiversion setting.

Apparently there is no error, and nothing to remove as seen in the original report:

zypper[13717]: Nothing to do.
systemd[1]: purge-kernels.service: Deactivated successfully.

(In reply to Michal Suchanek from comment #6)
> Apparently there is no error, and nothing to remove as seen in the original
> report:
> 
> zypper[13717]: Nothing to do.
> systemd[1]: purge-kernels.service: Deactivated successfully.

Probably my file has the wrong syntax, but the following kernels are installed:

kernel-default-6.5.9-1.3
kernel-default-6.6.1-1.1
kernel-default-6.6.10-1.1
kernel-default-6.6.11-1.1
kernel-default-6.6.2-1.1
kernel-default-6.6.3-1.1
kernel-default-6.6.6-1.1
kernel-default-6.6.7-1.1
kernel-default-6.6.9-1.1
kernel-default-6.7.2-1.3
kernel-default-6.7.4-1.1
kernel-default-6.7.5-1.1
kernel-default-6.7.6-1.1

So with

provides:multiversion(6.5.9-1.3)
provides:multiversion(6.6.11-1.1)
provides:multiversion(latest-2)
provides:multiversion(latest-1)
provides:multiversion(latest)
provides:multiversion(running)

I'd expect these ones to be removed:

kernel-default-6.6.1-1.1
kernel-default-6.6.10-1.1
kernel-default-6.6.2-1.1
kernel-default-6.6.3-1.1
kernel-default-6.6.6-1.1
kernel-default-6.6.7-1.1
kernel-default-6.6.9-1.1

Not correct?

(In reply to Michal Suchanek from comment #4)
> Your file is, however, not in this format.
> 

So what would be the correct format?

(In reply to Michael Hirmke from comment #3)

> ## provides:multiversion(kernel)

Also from the same file:

## Comma separated list of kernel packages to keep installed in parallel, if the
## above multiversion variable is set. Packages can be specified as
## 2.6.32.12-0.7 - Exact version to keep
## latest        - Keep kernel with the highest version number
## latest-N      - Keep kernel with the Nth highest version number
## running       - Keep the running kernel
## oldest        - Keep kernel with the lowest version number (the GA kernel)
## oldest+N      - Keep kernel with the Nth lowest version number
##
## Note: This entry is not evaluated by libzypp, but by the
##       purge-kernels service (via /sbin/purge-kernels).
##
## Default: Do not delete any kernels if multiversion = provides:multiversion(kernel) is set
multiversion.kernels = latest,latest-1,running

(In reply to Michal Suchanek from comment #9)
> (In reply to Michael Hirmke from comment #3)
> 
> > ## provides:multiversion(kernel)
> 
> Also from the same file:
> 
> ## Comma separated list of kernel packages to keep installed in parallel, if
> the
> ## above multiversion variable is set. Packages can be specified as
> ## 2.6.32.12-0.7 - Exact version to keep
> ## latest        - Keep kernel with the highest version number
> ## latest-N      - Keep kernel with the Nth highest version number
> ## running       - Keep the running kernel
> ## oldest        - Keep kernel with the lowest version number (the GA kernel)
> ## oldest+N      - Keep kernel with the Nth lowest version number
> ##
> ## Note: This entry is not evaluated by libzypp, but by the
> ##       purge-kernels service (via /sbin/purge-kernels).
> ##
> ## Default: Do not delete any kernels if multiversion =
> provides:multiversion(kernel) is set
> multiversion.kernels = latest,latest-1,running

Sorry, I didn't get that - I already commented out
## provides:multiversion(kernel)

Or do you mean, the syntax is
multiversion.kernels = latest,latest-1,running
also in multiversiond.d/xyz?

This would mean, I can't have an extra line for every kernel version to keep?

You should read zypp.conf in complete.

Your content of /etc/zypp/multiversion.d is invalid. The correct format is "provides:multiversion(kernel)". Nothing more nothin less. No versions. 
This file only defines Packages (names) which can be installed in different versions at the same time. But as the kernel package is already defined as "multiversion = provides:multiversion(kernel)" one chapter above in zypp.conf, your /etc/zypp/multiversion.d is useless at all...

To define which kernels you want to keep, you need to utilise the "multiversion.kernels = latest,latest-1,latest-2,latest-3,running" line as explained in zypp.conf.

(In reply to hui from comment #11)
> You should read zypp.conf in complete.
> 
> Your content of /etc/zypp/multiversion.d is invalid. The correct format is
> "provides:multiversion(kernel)". Nothing more nothin less. No versions. 
> This file only defines Packages (names) which can be installed in different
> versions at the same time. But as the kernel package is already defined as
> "multiversion = provides:multiversion(kernel)" one chapter above in
> zypp.conf, your /etc/zypp/multiversion.d is useless at all...
> 
> To define which kernels you want to keep, you need to utilise the
> "multiversion.kernels = latest,latest-1,latest-2,latest-3,running" line as
> explained in zypp.conf.

Ok, thx - I've read the file in complete, but obviously I misunderstood it.
So a file in mulitversion.d could contain

provides:multiversion(kernel)
provides:multiversion(package1)
provides:multiversion(package2)
...

So there is no way I could add one line per version I'd like to keep?

It's for the one and only provides:multiversion(kernel)

##
## Packages which can be installed in different versions at the same time.
##
## Packages are selected either by name, or by provides. In the later case
## the string must start with "provides:" immediately followed by the capability.
##
## Example:
##      kernel                          - just packages whith name 'kernel'
##      provides:multiversion(kernel)   - all packages providing 'multiversion(kernel)'
##                                        (kenel and kmp packages should do this)
## Valid values:
##      Comma separated list of packages.
##
## Default value:
##      empty
##
multiversion = provides:multiversion(kernel)

##
## Defining directory which may contain additional multiversion definitions.
##
## If the directory exists, each file in this directory is scanned, expecting
## one valid multiversion list entry per line. Empty lines and lines starting
## with '#' are ignored.
## ------------------------- [/etc/zypp/multiversion.d/example file begin] -----------------------
## # An alternate way to enable kernel packages being
## # installed in parallel:
##
## provides:multiversion(kernel)
## ------------------------- [/etc/zypp/multiversion.d/example file end] -----------------------
##
## Valid values: A directory
## Default value: {configdir}/multiversion.d
##
# multiversiondir = /etc/zypp/multiversion.d

Thx4all!