Very Slow Boot MacPro 1,1 w.16.04.3LTS

Hi there, after many tryouts i decided to convert my old but goldie MacPro 1.1 to Ubuntu 16.04 using rEFIt
after the successful install i'm experiencing a very slow boot up, i tried to follow some other peoples issue like mine but i see that everybody seems to have different ways to clean up, i updated and purged what i know it's possible without do damages but my startup time is still 1min.40sec!! i assume that 30 secs with my HW is the good measure, i have no problem about the startup in itself, but i figure out that below this there is some problem hide.
I have to say that i'm a Newbie and what i know is due to guides online and some hard ass tryout, i want to thank in advance any good soul that give his time to help.
Here's what it come out from the systemd-analyze blame:

     13.580s dev-mapper-ubuntu\x2d\x2dmate\x2d\x2dvg\x2droot.device
     12.785s [email protected]:00-0000:00:1d.7-usb1-1\x2d3.service
     11.431s lvm2-monitor.service
     11.032s systemd-modules-load.service
     10.609s keyboard-setup.service
     10.319s systemd-tmpfiles-setup-dev.service
      8.678s NetworkManager-wait-online.service
      5.644s apport.service
      5.570s irqbalance.service
      5.485s networking.service
      5.463s grub-common.service
      5.386s speech-dispatcher.service
      5.382s ondemand.service
      5.197s NetworkManager.service
      4.493s lightdm.service
      4.389s snapd.service
      3.679s ModemManager.service
      2.475s thermald.service
      2.242s resolvconf.service
      1.822s accounts-daemon.service
      1.269s colord.service
      1.020s lm-sensors.service