Cfrgtkky

$ systemd-analyze

Startup finished in 4.251s (firmware) + 2.465s (loader) + 1min 42.939s (kernel) + 37.609s (userspace) = 2min 27.266s

graphical.target reached after 37.467s in userspace

$ systemd-analyze blame

         19.962s dev-sda6.device

         19.857s systemd-journal-flush.service

         18.791s keyboard-setup.service

         11.982s systemd-udevd.service

          8.832s plymouth-quit-wait.service

          7.820s NetworkManager-wait-online.service

          5.354s systemd-tmpfiles-setup-dev.service

          3.216s snapd.service

          3.099s ModemManager.service

          2.899s udisks2.service

          2.565s thermald.service

          2.513s NetworkManager.service

          2.437s networkd-dispatcher.service

          2.356s fwupd.service

          2.353s accounts-daemon.service

          2.193s systemd-fsck@dev-disk-byx2duuid-148Fx2d75AB.service

          1.895s systemd-fsck@dev-disk-byx2duuid-d3ac8189x2de076x2d4ea7x2dad

          1.846s networking.service

          1.365s gpu-manager.service

          1.298s systemd-modules-load.service

          1.158s plymouth-start.service

          1.091s dev-disk-byx2duuid-65331ba5x2d436ax2d4a88x2d9a59x2defea07c

           848ms grub-common.service

           767ms systemd-remount-fs.service

           763ms dev-mqueue.mount

           756ms bluetooth.service

           748ms packagekit.service

           704ms dev-hugepages.mount

           696ms sys-kernel-debug.mount

           658ms wpa_supplicant.service

           559ms apport.service

           548ms systemd-journald.service

           543ms rsyslog.service

           518ms avahi-daemon.service

           508ms pppd-dns.service

           502ms polkit.service

           438ms apparmor.service

           435ms gdm.service

           380ms colord.service

           337ms kmod-static-nodes.service

           309ms systemd-sysctl.service

           290ms dns-clean.service

           208ms systemd-tmpfiles-setup.service

           189ms systemd-rfkill.service

           182ms systemd-udev-trigger.service

           182ms systemd-update-utmp.service

           175ms user@121.service

           173ms systemd-logind.service

           170ms upower.service

           159ms systemd-timesyncd.service

           155ms systemd-random-seed.service

           141ms setvtrgb.service

           135ms systemd-resolved.service

           124ms user@1000.service

           122ms snap-gtkx2dcommonx2dthemes-319.mount

           120ms plymouth-read-write.service

           107ms snap-gnomex2dcalculator-180.mount

            92ms bolt.service

            90ms snap-core-4917.mount

            87ms home.mount

            82ms snap-gnomex2dlogs-37.mount

            69ms snap-gnomex2d3x2d26x2d1604-70.mount

            64ms speech-dispatcher.service

            62ms ufw.service

            60ms alsa-restore.service

            47ms snap-gnomex2dcharacters-103.mount

            39ms boot-efi.mount

            27ms snap-gnomex2dsystemx2dmonitor-51.mount

            19ms rtkit-daemon.service

            13ms kerneloops.service

            10ms systemd-backlight@backlight:amdgpu_bl1.service

             9ms snapd.seeded.service

             8ms ureadahead-stop.service

             7ms systemd-update-utmp-runlevel.service

             7ms dev-loop3.device

             6ms dev-loop2.device

             6ms dev-loop1.device

             6ms dev-loop0.device

             4ms console-setup.service

             3ms dev-loop6.device

             3ms sys-kernel-config.mount

             3ms systemd-user-sessions.service

             3ms dev-loop5.device

             3ms dev-loop4.device

             2ms sys-fs-fuse-connections.mount

             974us snapd.socket

name -a

Linux nitro-AN515-42 4.15.0-38-generic #41-Ubuntu SMP Wed Oct 10 10:59:38 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux

systemd-analyze critical-chain

The time after the unit is active or started is printed after the "@" character.

The time the unit takes to start is printed after the "+" character.

graphical.target @30.886s

└─multi-user.target @30.886s

  └─kerneloops.service @30.870s +15ms

    └─network-online.target @30.868s

      └─NetworkManager-wait-online.service @24.018s +6.849s

        └─NetworkManager.service @21.653s +2.362s

          └─dbus.service @20.975s

            └─basic.target @20.944s

              └─sockets.target @20.944s

                └─snapd.socket @20.939s +2ms

                  └─sysinit.target @20.935s

                    └─apparmor.service @20.536s +396ms

                      └─local-fs.target @20.532s

                        └─run-user-121.mount @24.846s

                          └─local-fs-pre.target @19.078s

                            └─keyboard-setup.service @2.381s +16.696s

                              └─systemd-journald.socket @2.341s

                                └─system.slice @2.340s

                                  └─-.slice @2.337s

I use Ubuntu dual booted with Windows in Acer Nitro 5 laptop.

Looks like your kernel is the one to blame here, can you please paste the return of uname -a and systemd-analyze critical-chain ?