Comment # 5 on bug 885696 from grant k

> What is the content of those directories?

currently active

    uname -rm
        3.18.1-1.g5f2f35e-desktop x86_64

'remnant' dirs

    du -h --max-depth=1 . -c
        8.7M    ./3.17.4-1.gd50009e-desktop
        182M    ./3.18.0-2.g99a9f76-desktop
        4.0K    ./3.18.0-1.gfc82a91-default
        4.0K    ./3.17.4-2.g2d23787-xen
        4.0K    ./3.18.0-1.gfc82a91-xen
        4.0K    ./3.18.0-2.g99a9f76-xen
        202M    ./3.18.1-1.g5f2f35e-desktop
        4.0K    ./3.18.0-2.g99a9f76-default
        4.0K    ./3.17.4-4.g8622a2e-xen
        4.0K    ./3.17.6-1.g12b7bf1-xen
        4.0K    ./3.18.1-1.g5f2f35e-xen
        4.0K    ./3.17.4-1.gd50009e-default
        4.0K    ./3.17.6-1.g12b7bf1-default
        4.0K    ./3.17.4-3.gbde0c3f-xen
        8.7M    ./3.17.4-2.g2d23787-desktop
        4.0K    ./3.17.4-3.gbde0c3f-default
        4.0K    ./3.17.4-4.g8622a2e-default
        4.0K    ./3.17.4-2.g2d23787-default
        4.0K    ./3.17.4-1.gd50009e-xen
        4.0K    ./3.18.1-1.g5f2f35e-default
        16K     ./3.18.0-1.gfc82a91-desktop
        400M    .
        400M    total

content examples for non-active kernels

    tree 3.17.4-1.gd50009e-desktop 3.18.0-1.gfc82a91-default
3.18.0-1.gfc82a91-desktop
        3.17.4-1.gd50009e-desktop
        ��������� [root            4096]  misc
            ��������� [root         7614962]  vboxdrv.ko
            ��������� [root          366208]  vboxnetadp.ko
            ��������� [root          554011]  vboxnetflt.ko
            ��������� [root          524709]  vboxpci.ko
        3.18.0-1.gfc82a91-default
        3.18.0-1.gfc82a91-desktop
        ��������� [root            4096]  kernel
            ��������� [root            4096]  drivers
                ��������� [root            4096]  video

        4 directories, 4 files

 Also, what does

  rpm -qf /sbin/depmod

> The most likely reason is that you are using a different kmod version than what the kernel has been built against, so the package does not know about some files generated by depmod.

    rpm -qf /sbin/depmod
        kmod-compat-18-2.2.2.x86_64