I edited the grub replacing 'quiet' with 'text' so that I can see what's happening.
I found two time-consuming processes:
Begin: Running /scripts/local-block/ .... done
and then a bit later:
[drm] RC6 on progress on 1 disk
Output of dmesg:
...
[ 2.575722] usb 1-9: New USB device found, idVendor=0bda, idProduct=0165
[ 2.576280] usb 1-9: New USB device strings: Mfr=1, Product=6, SerialNumber=3
[ 2.576838] usb 1-9: Product: Smart Card Reader Interface
[ 2.577387] usb 1-9: Manufacturer: Generic
[ 2.577931] usb 1-9: SerialNumber: 20070818000000000
[ 2.736093] usb 1-10: new high-speed USB device number 5 using xhci_hcd
[ 2.907330] usb 1-10: New USB device found, idVendor=058f, idProduct=6377
[ 2.907893] usb 1-10: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 2.908450] usb 1-10: Product: Mass Storage Device
[ 2.908997] usb 1-10: Manufacturer: Generic
[ 2.909543] usb 1-10: SerialNumber: 920321111113
[ 2.910582] usb-storage 1-10:1.0: USB Mass Storage device detected
[ 2.911360] scsi host7: usb-storage 1-10:1.0
[ 3.935849] scsi 7:0:0:0: Direct-Access Generic USB SD Reader 1.00 PQ: 0 ANSI: 0
[ 3.936928] scsi 7:0:0:1: Direct-Access Generic USB CF Reader 1.01 PQ: 0 ANSI: 0
[ 3.937970] scsi 7:0:0:2: Direct-Access Generic USB SM Reader 1.02 PQ: 0 ANSI: 0
[ 3.939031] scsi 7:0:0:3: Direct-Access Generic USB MS Reader 1.03 PQ: 0 ANSI: 0
[ 3.941651] sd 7:0:0:0: [sde] Attached SCSI removable disk
[ 3.955337] sd 7:0:0:3: [sdh] Attached SCSI removable disk
[ 3.955713] sd 7:0:0:1: [sdf] Attached SCSI removable disk
[ 3.956483] sd 7:0:0:2: [sdg] Attached SCSI removable disk
[ 33.626231] EXT4-fs (sda5): mounted filesystem with ordered data mode. Opts: (null)
[ 33.699689] NET: Registered protocol family 10
[ 33.703626] Segment Routing with IPv6
[ 33.705987] ip_tables: (C) 2000-2006 Netfilter Core Team
[ 33.710738] systemd[1]: systemd 235 running in system mode. (+PAM +AUDIT +SELINUX +IMA +APPARMOR +SMACK +SYSVINIT +UTMP +LIBCRYPTSETUP +GCRYPT +GNUTLS +ACL +XZ +LZ4 +SECCOMP +BLKID +ELFUTILS +KMOD -IDN2 +IDN default-hierarchy=hybrid)
[ 33.711423] systemd[1]: Detected architecture x86-64.
[ 33.713596] systemd[1]: Set hostname to <siductionbox>.
[ 33.760092] systemd[1]: getty.target: Wants dependency dropin /etc/systemd/system/getty.target.wants/getty@tty1.service target /lib/systemd/system/autovt@.service has different name
[ 33.773050] systemd[1]: Created slice System Slice.
[ 33.773980] systemd[1]: Mounting RPC Pipe File System...
[ 33.774704] systemd[1]: Listening on LVM2 metadata daemon socket.
[ 33.775467] systemd[1]: Listening on /dev/initctl Compatibility Named Pipe.
[ 33.777102] systemd[1]: Listening on Process Core Dump Socket.
[ 33.777929] systemd[1]: Created slice system-getty.slice.
[ 33.782304] RPC: Registered named UNIX socket transport module.
[ 33.782304] RPC: Registered udp transport module.
[ 33.782305] RPC: Registered tcp transport module.
[ 33.782305] RPC: Registered tcp NFSv4.1 backchannel transport module.
[ 33.788166] Installing knfsd (copyright (C) 1996 okir@monad.swb.de).
[ 33.805286] EXT4-fs (sda5): re-mounted. Opts: (null)
[ 33.806011] lp: driver loaded but no devices found
[ 33.808005] ppdev: user-space parallel port driver
[ 33.809583] parport_pc 00:01: reported by Plug and Play ACPI
[ 33.809649] parport0: PC-style at 0x378, irq 5 [PCSPP]
[ 33.824627] systemd-journald[530]: Received request to flush runtime journal from PID 1
[ 33.899045] lp0: using parport0 (interrupt-driven).
[ 33.899045] lp0: console ready
[ 33.901927] loop: module loaded
[ 33.923129] input: Sleep Button as /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0E:00/input/input5
[ 33.923686] ACPI: Sleep Button [SLPB]
[ 33.924865] input: Power Button as /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0C:00/input/input6
[ 33.925809] ACPI: Power Button [PWRB]
[ 33.926386] input: Power Button as /devices/LNXSYSTM:00/LNXPWRBN:00/input/input7
[ 33.927447] ACPI: Power Button [PWRF]
[ 33.943007] Bluetooth: Core ver 2.22
[ 33.943631] NET: Registered protocol family 31
[ 33.944163] Bluetooth: HCI device and connection manager initialized
[ 33.944697] Bluetooth: HCI socket layer initialized
[ 33.945267] Bluetooth: L2CAP socket layer initialized
[ 33.945828] Bluetooth: SCO socket layer initialized
[ 33.954522] Bluetooth: HCI UART driver ver 2.3
[ 33.955040] Bluetooth: HCI UART protocol H4 registered
[ 33.955560] Bluetooth: HCI UART protocol BCSP registered
[ 33.956065] Bluetooth: HCI UART protocol LL registered
[ 33.956548] Bluetooth: HCI UART protocol ATH3K registered
[ 33.957034] Bluetooth: HCI UART protocol Three-wire (H5) registered
[ 33.957541] Bluetooth: HCI UART protocol Intel registered
[ 33.958020] Bluetooth: HCI UART protocol Broadcom registered
[ 33.958479] Bluetooth: HCI UART protocol QCA registered
[ 33.958938] Bluetooth: HCI UART protocol AG6XX registered
[ 33.959416] Bluetooth: HCI UART protocol Marvell registered
[ 33.960212] shpchp: Standard Hot Plug PCI Controller Driver version: 0.4
[ 33.963521] sd 0:0:0:0: Attached scsi generic sg0 type 0
[ 33.964433] sd 1:0:0:0: Attached scsi generic sg1 type 0
[ 33.965004] sr 4:0:0:0: Attached scsi generic sg2 type 5
[ 33.965516] sd 5:0:0:0: Attached scsi generic sg3 type 0
[ 33.966455] sd 6:0:0:0: Attached scsi generic sg4 type 0
[ 33.966899] sd 7:0:0:0: Attached scsi generic sg5 type 0
[ 33.967574] sd 7:0:0:1: Attached scsi generic sg6 type 0
[ 33.968087] sd 7:0:0:2: Attached scsi generic sg7 type 0
[ 33.968695] sd 7:0:0:3: Attached scsi generic sg8 type 0
[ 33.971705] iTCO_vendor_support: vendor-support=0
[ 33.976055] iTCO_wdt: Intel TCO WatchDog Timer Driver v1.11
[ 33.976595] iTCO_wdt: Found a Intel PCH TCO device (Version=4, TCOBASE=0x0400)
[ 33.978322] iTCO_wdt: initialized. heartbeat=30 sec (nowayout=0)
[ 33.986204] input: PC Speaker as /devices/platform/pcspkr/input/input8
[ 33.990522] media: Linux media interface: v0.10
[ 33.994707] Linux video capture interface: v2.00
[ 34.004275] pwc: Logitech QuickCam 4000 Pro USB webcam detected.
[ 34.005158] [drm] Memory usable by graphics device = 4096M
[ 34.005579] checking generic (c0000000 500000) vs hw (c0000000 10000000)
[ 34.005579] fb: switching to inteldrmfb from simple
[ 34.006081] Console: switching to colour dummy device 80x25
[ 34.006167] [drm] Replacing VGA console driver
[ 34.012097] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[ 34.012100] [drm] Driver supports precise vblank timestamp query.
[ 34.020244] i915 0000:00:02.0: vgaarb: changed VGA decodes: olddecodes=io+mem,decodes=io+mem:owns=io+mem
[ 34.022541] i915 0000:00:02.0: firmware: direct-loading firmware i915/kbl_dmc_ver1_01.bin
[ 34.022854] [drm] Finished loading DMC firmware i915/kbl_dmc_ver1_01.bin (v1.1)
[ 34.023381] [drm] Initialized i915 1.6.0 20170619 for 0000:00:02.0 on minor 0
[ 34.024651] ACPI: Video Device [GFX0] (multi-head: yes rom: no post: no)
[ 34.025131] acpi device:0f: registered as cooling_device9
[ 34.025187] input: Video Bus as /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/LNXVIDEO:00/input/input9
[ 34.029395] intel_rapl: Found RAPL domain package
[ 34.029398] intel_rapl: Found RAPL domain core
[ 34.029399] intel_rapl: Found RAPL domain uncore
[ 34.029417] intel_rapl: Found RAPL domain dram
[ 34.059770] ath: EEPROM regdomain: 0x809c
[ 34.059771] ath: EEPROM indicates we should expect a country code
[ 34.059772] ath: doing EEPROM country->regdmn map search
[ 34.059772] ath: country maps to regdmn code: 0x52
[ 34.059773] ath: Country alpha2 being used: CN
[ 34.059773] ath: Regpair used: 0x52
[ 34.066247] ieee80211 phy0: Selected rate control algorithm 'minstrel_ht'
[ 34.066434] ieee80211 phy0: Atheros AR9285 Rev:2 mem=0xffffc90002660000, irq=16
[ 34.074993] Adding 95392k swap on /dev/sda6. Priority:-1 extents:1 across:95392k SSFS
[ 34.081758] ath9k 0000:01:00.0 wlp1s0: renamed from wlan0
[ 34.194500] pwc: Registered as video0.
[ 34.194522] input: PWC snapshot button as /devices/pci0000:00/0000:00:14.0/usb1/1-8/input/input10
[ 34.194563] usbcore: registered new interface driver Philips webcam
[ 34.226725] EXT4-fs (sdd1): mounted filesystem with ordered data mode. Opts: (null)
[ 34.230006] usbcore: registered new interface driver snd-usb-audio
[ 34.241533] snd_hda_intel 0000:00:1f.3: bound 0000:00:02.0 (ops i915_audio_component_bind_ops [i915])
[ 34.241629] fbcon: inteldrmfb (fb0) is primary device
[ 34.262161] snd_hda_codec_realtek hdaudioC0D0: autoconfig for ALC887-VD: line_outs=1 (0x14/0x0/0x0/0x0/0x0) type:line
[ 34.262161] snd_hda_codec_realtek hdaudioC0D0: speaker_outs=0 (0x0/0x0/0x0/0x0/0x0)
[ 34.262162] snd_hda_codec_realtek hdaudioC0D0: hp_outs=1 (0x1b/0x0/0x0/0x0/0x0)
[ 34.262163] snd_hda_codec_realtek hdaudioC0D0: mono: mono_out=0x0
[ 34.262163] snd_hda_codec_realtek hdaudioC0D0: inputs:
[ 34.262164] snd_hda_codec_realtek hdaudioC0D0: Front Mic=0x19
[ 34.262164] snd_hda_codec_realtek hdaudioC0D0: Rear Mic=0x18
[ 34.262165] snd_hda_codec_realtek hdaudioC0D0: Line=0x1a
[ 34.277291] input: HDA Intel PCH Front Mic as /devices/pci0000:00/0000:00:1f.3/sound/card0/input11
[ 34.277315] input: HDA Intel PCH Rear Mic as /devices/pci0000:00/0000:00:1f.3/sound/card0/input12
[ 34.277336] input: HDA Intel PCH Line as /devices/pci0000:00/0000:00:1f.3/sound/card0/input13
[ 34.277354] input: HDA Intel PCH Line Out as /devices/pci0000:00/0000:00:1f.3/sound/card0/input14
[ 34.277372] input: HDA Intel PCH Front Headphone as /devices/pci0000:00/0000:00:1f.3/sound/card0/input15
[ 34.277391] input: HDA Intel PCH HDMI/DP,pcm=3 as /devices/pci0000:00/0000:00:1f.3/sound/card0/input16
[ 34.277409] input: HDA Intel PCH HDMI/DP,pcm=7 as /devices/pci0000:00/0000:00:1f.3/sound/card0/input17
[ 34.277427] input: HDA Intel PCH HDMI/DP,pcm=8 as /devices/pci0000:00/0000:00:1f.3/sound/card0/input18
[ 34.277446] input: HDA Intel PCH HDMI/DP,pcm=9 as /devices/pci0000:00/0000:00:1f.3/sound/card0/input19
[ 34.277463] input: HDA Intel PCH HDMI/DP,pcm=10 as /devices/pci0000:00/0000:00:1f.3/sound/card0/input20
[ 34.292712] Console: switching to colour frame buffer device 240x67
[ 34.312033] i915 0000:00:02.0: fb0: inteldrmfb frame buffer device
[ 34.555142] EXT4-fs (sdb3): mounted filesystem with ordered data mode. Opts: (null)
[ 35.743444] [drm] RC6 on
[ 82.401103] EXT4-fs (sdc4): mounted filesystem with ordered data mode. Opts: (null)
[ 82.655348] IPv6: ADDRCONF(NETDEV_UP): enp2s0: link is not ready
[ 82.656231] r8169 0000:02:00.0: firmware: direct-loading firmware rtl_nic/rtl8168h-2.fw
[ 82.668837] r8169 0000:02:00.0 enp2s0: link down
[ 82.669369] r8169 0000:02:00.0 enp2s0: link down
[ 82.670014] IPv6: ADDRCONF(NETDEV_UP): enp2s0: link is not ready
[ 82.672533] IPv6: ADDRCONF(NETDEV_UP): wlp1s0: link is not ready
[ 82.687638] IPv6: ADDRCONF(NETDEV_UP): wlp1s0: link is not ready
[ 82.708568] IPv6: ADDRCONF(NETDEV_UP): wlp1s0: link is not ready
[ 82.728727] NET: Registered protocol family 17
[ 82.748021] IPv6: ADDRCONF(NETDEV_UP): wlp1s0: link is not ready
[ 83.414022] NFSD: Using /var/lib/nfs/v4recovery as the NFSv4 state recovery directory
[ 83.415800] NFSD: starting 90-second grace period (net ffffffff81cba5c0)
[ 85.523384] r8169 0000:02:00.0 enp2s0: link up
[ 85.523425] IPv6: ADDRCONF(NETDEV_CHANGE): enp2s0: link becomes ready
[ 93.559360] fuse init (API version 7.26)
[ 93.893881] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[ 93.893883] Bluetooth: BNEP filters: protocol multicast
[ 93.893885] Bluetooth: BNEP socket layer initialized
[ 96.627252] rfkill: input handler disabled
[ 425.027501] IPv6: ADDRCONF(NETDEV_UP): wlp1s0: link is not ready
[ 740.034023] IPv6: ADDRCONF(NETDEV_UP): wlp1s0: link is not ready
[ 1055.045429] IPv6: ADDRCONF(NETDEV_UP): wlp1s0: link is not ready
dion@siductionbox:~$ blkid
/dev/sdb2: LABEL="Windata" UUID="DC14118014115F38" TYPE="ntfs" PARTLABEL="Windows data" PARTUUID="fa6802f1-9a4c-4b1e-9372-713c4e0661b6"
/dev/sdb3: LABEL="home" UUID="68cac8fc-922a-4a52-86c9-78d6154e03aa" TYPE="ext4" PARTLABEL="Linux data" PARTUUID="3c66ec4f-e980-48a3-b4bf-155e764821e8"
/dev/sda1: LABEL="Herstel" UUID="F49E68F59E68B1B2" TYPE="ntfs" PARTLABEL="Basi" PARTUUID="cd7531f6-2bcc-48d9-9b13-1b49a2f06907"
/dev/sda2: UUID="2068-DCA4" TYPE="vfat" PARTLABEL="EFI" PARTUUID="73443833-8b3f-4b1d-bc8b-fe2d2034fb5c"
/dev/sda4: LABEL="windows" UUID="B8706A357069FA90" TYPE="ntfs" PARTUUID="0df2e960-bf5f-46b3-a04e-f5a1a0c48dcf"
/dev/sda5: UUID="01ce6ad0-d23b-433a-9f8e-c7260b1955ee" TYPE="ext4" PARTUUID="a16ee7f6-08b3-43fc-8f32-25e628401a1d"
/dev/sda6: UUID="2605ebab-d33a-4408-b51e-bfcd421b8887" TYPE="swap" PARTUUID="d46ddd69-288e-4c67-b3c5-46d782e8a77d"
/dev/sdc1: LABEL="oldroot" UUID="666e42a0-0b61-43ec-b3e8-0af894888e4d" TYPE="ext4" PARTUUID="7a89d7e3-01"
/dev/sdc4: LABEL="HD1TB" UUID="26dd6ee1-46db-4884-8237-9c41412c8d89" TYPE="ext4" PARTUUID="7a89d7e3-04"
/dev/sdd1: LABEL="backup" UUID="8d413a0a-61a5-4b97-9e8c-4480c2a6f43d" TYPE="ext4"
dion@siductionbox:~$ cat /etc/fstab
# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a device; this may
# be used with UUID= as a more robust way to name devices that works even if
# disks are added and removed. See fstab(5).
#
# <file system> <mount point> <type> <options> <dump> <pass>
UUID=01ce6ad0-d23b-433a-9f8e-c7260b1955ee / ext4 defaults,noatime 0 1
UUID=2605ebab-d33a-4408-b51e-bfcd421b8887 swap swap defaults,noatime 0 0
UUID=68cac8fc-922a-4a52-86c9-78d6154e03aa /home ext4 defaults,noatime 0 2
UUID=8d413a0a-61a5-4b97-9e8c-4480c2a6f43d /media/dion/backup ext4 defaults,noatime 0 2
UUID=26dd6ee1-46db-4884-8237-9c41412c8d89 /media/dion/HD1TB ext4 defaults,noatime 0 2
tmpfs /tmp tmpfs defaults,noatime,mode=1777 0 0
Does this help?