kubuntu boot time

hello,
I upgraded kubuntu version 14.10 to 15.10, and it works fine except that I noticed the startup is slow. googleing the problem, I found this
systemd-analyze blame
and it seems that
networkmanager-wait-online.service
is the problem. So I googled how to disable it, and found
systemctl disable NetworkManager-wait-online.service
and that didn't work, then I found
systemctl mask NetworkManager-wait-online.service
but that didn't work either
So, any ideas how I could disable this service?
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JeffBeallAsked:
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gheistCommented:
All thing systemctl does is removes couple of files:
rm -i /etc/systemd/system/*wants/NetworkManager-wait-online.service
JeffBeallAuthor Commented:
Thank you!!! that FINALLY did it. Although, I had to find it at the location you had, but it still loaded on a reboot. Your answer made me search everywhere, and I found it two other places.
and
systemd-analyze blame
shows that it is finally gone.
Of course, now I want to weed out other services that I don't need, for instance the slowest service now is dev-sda6.device and then gpu-manager.service loading at 643ms and 582ms respectively.
the thing is, I don't know what I need and what I don't. Would there be a list of essential services?
Also, do you know of a way to just disable the service? It seems like an all or nothing kind of thing to remove the file.
gheistCommented:
openSuse:
(compare if something goes much slower than this and look into them)

          8.029s ModemManager.service
          8.021s systemd-udev-settle.service
          7.885s systemd-logind.service
          7.815s alsa-restore.service
          7.813s rsyslog.service
          7.807s atieventsd.service
          7.806s systemd-user-sessions.service
          7.802s rc-local.service
          7.801s vboxdrv.service
          7.767s bluetooth.service
          7.760s avahi-daemon.service
          7.754s wpa_supplicant.service
          3.054s lvm2-activation-early.service
          2.707s lvm2-activation.service
          2.503s systemd-fsck@dev-system-home.service
          2.378s fglrxrebuild.service
          1.690s NetworkManager-wait-online.service
          1.390s home.mount
          1.313s display-manager.service
          1.296s postgresql.service
          1.115s apparmor.service

(and I would like to thank you for inspiring me to chop my boot time by 10s)

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JeffBeallAuthor Commented:
I guess we both benefited, good collaboration, however, I think you would be the brains of this organization.
Yep, I have some googleing to do. I want to see just how fast this thing will boot.
Thanks again for your help.
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