Old Kernel Modules Directories not Cleaned up

[Stephen Morris]

Hi,
     DNF is currently configured to keep 3 kernel versions, consequently 
when I exceed that number of kernels it automatically uninstalls the 
oldest kernel, which I don't have any issues with, but what I do have an 
issue with is when these uninstalls are done it does not clean up the 
/lib/modules directories, they are left lying around. I had to delete a 
dozen of these directories this morning manually, why are these not 
removed when the associated kernels are removed? I didn't check what was 
in these directories, but I do have the nvidia and virtualbox kernel 
drivers installed as well, is it possible the removal of these when the 
associated kernel is removed is not cleaning up properly?

regards,
Steve

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