I just formatted my whole hard disk and installed Ubuntu 18.04 on my Lenovo Legion Y520 (16 Gb of Ram, 7th generation i7-7700HQ processor). I read that the boot time shouldn't exceed 10-15 seconds. I'm still new to Linux, searching the problem told me to see where the gap is using systemd-analyze blame , so here is the result:

28.126s plymouth-quit-wait.service 11.528s dev-mapper-ubuntu\x2d\x2dvg\x2droot.device 8.639s lvm2-monitor.service 7.561s NetworkManager-wait-online.service 5.723s systemd-udevd.service 4.862s snapd.service 4.697s fwupd.service 4.387s plymouth-start.service 4.211s ModemManager.service 3.678s systemd-journal-flush.service 3.608s udisks2.service 3.029s accounts-daemon.service

The rest are under 2 seconds. Also running dmesg shows this (It shows around a hundred line, not sure if that is normal, so I'm only posting before and after the large gaps):

[ 1.706449] sd 2:0:0:0: Attached scsi generic sg0 type 0 [ 1.766858] sda: sda1 sda2 [ 1.767360] sd 2:0:0:0: [sda] Attached SCSI disk [ 1.821574] usb 1-11: New USB device found, idVendor=8087, idProduct=0a2b [ 1.821576] usb 1-11: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 1.830362] psmouse serio1: elantech: assuming hardware version 4 (with firmware version 0x6d4f00) [ 1.846245] psmouse serio1: elantech: Synaptics capabilities query result 0x70, 0x15, 0x0c. [ 1.861928] psmouse serio1: elantech: Elan sample query result 02, 2d, a8 [ 1.952059] input: ETPS/2 Elantech Touchpad as /devices/platform/i8042/serio1/input/input5 [ 2.016532] clocksource: Switched to clocksource tsc [ 2.780832] [drm] RC6 on [ 34.554607] random: crng init done [ 59.583351] EXT4-fs (dm-0): mounted filesystem with ordered data mode. Opts: (null)

The results continue to reach for 570 seconds, but no way it took that long to boot. Not sure if I did something wrong.

Thank you.