So, I got basically the same error as before with the kernel 4.14-rc8. There is an error on the USB port from my DisplayLink dock station, but the major slowdown part is to find and mount my LVM /home volume (see the full log of journalctl -abl from the attachment):
Nov 06 17:08:21 QC5-ubuntu systemd[1]: Stopped NVIDIA Persistence Daemon. Nov 06 17:08:22 QC5-ubuntu systemd[1]: Starting Show Plymouth Boot Screen... Nov 06 17:08:22 QC5-ubuntu systemd[1]: Started Braille Device Support. Nov 06 17:08:22 QC5-ubuntu systemd[1]: Started Show Plymouth Boot Screen. Nov 06 17:09:21 QC5-ubuntu systemd-udevd[454]: seq 2806 '/devices/pci0000:00/0000:00:14.0/usb2/2-1/2-1.4/2-1.4.1/2-1.4.1:1.0' Nov 06 17:09:50 QC5-ubuntu systemd[1]: dev-mapper-ubuntuvg\x2dhome.device: Job dev-mapper-ubuntuvg\x2dhome.device/start timed Nov 06 17:09:50 QC5-ubuntu systemd[1]: Timed out waiting for device dev-mapper-ubuntuvg\x2dhome.device. Nov 06 17:09:50 QC5-ubuntu systemd[1]: Dependency failed for /home. Nov 06 17:09:50 QC5-ubuntu systemd[1]: Dependency failed for Local File Systems. Nov 06 17:08:21 QC5-ubuntu kernel: (NULL device *): hwmon_device_register() is deprecated. Please convert the driver to use hw Nov 06 17:08:21 QC5-ubuntu kernel: thermal thermal_zone3: failed to read out thermal zone (-61) Nov 06 17:08:21 QC5-ubuntu systemd[1]: Found device ST500LM021-1KJ152 7. Nov 06 17:08:21 QC5-ubuntu systemd[1]: Started Show Plymouth Boot Screen. Nov 06 17:08:21 QC5-ubuntu systemd[1]: Reached target Sound Card. Nov 06 17:08:21 QC5-ubuntu systemd[1]: Starting Show Plymouth Boot Screen... Nov 06 17:08:21 QC5-ubuntu systemd[1]: Started Braille Device Support. Nov 06 17:08:21 QC5-ubuntu kernel: cdc_ncm 2-1.4.1:1.5 enx0050b660d5b6: renamed from usb0 Nov 06 17:08:21 QC5-ubuntu systemd[1]: Started Show Plymouth Boot Screen. Nov 06 17:08:21 QC5-ubuntu kernel: iwlwifi 0000:04:00.0 wlp4s0: renamed from wlan0 Nov 06 17:08:21 QC5-ubuntu systemd[1]: Started Load/Save RF Kill Switch Status. Nov 06 17:08:21 QC5-ubuntu kernel: input: ThinkPad Extra Buttons as /devices/platform/thinkpad_acpi/input/input17 Nov 06 17:08:21 QC5-ubuntu kernel: input: HDA Intel PCH Mic as /devices/pci0000:00/0000:00:1f.3/sound/card0/input20 Nov 06 17:08:21 QC5-ubuntu kernel: input: HDA Intel PCH Headphone as /devices/pci0000:00/0000:00:1f.3/sound/card0/input21 Nov 06 17:08:21 QC5-ubuntu systemd[1]: Stopped NVIDIA Persistence Daemon. Nov 06 17:08:22 QC5-ubuntu systemd[1]: Starting Show Plymouth Boot Screen... Nov 06 17:08:22 QC5-ubuntu systemd[1]: Started Braille Device Support. Nov 06 17:08:22 QC5-ubuntu systemd[1]: Started Show Plymouth Boot Screen. Nov 06 17:09:21 QC5-ubuntu systemd-udevd[454]: seq 2806 '/devices/pci0000:00/0000:00:14.0/usb2/2-1/2-1.4/2-1.4.1/2-1.4.1:1.0' Nov 06 17:09:50 QC5-ubuntu systemd[1]: dev-mapper-ubuntuvg\x2dhome.device: Job dev-mapper-ubuntuvg\x2dhome.device/start timed Nov 06 17:09:50 QC5-ubuntu systemd[1]: Timed out waiting for device dev-mapper-ubuntuvg\x2dhome.device. Nov 06 17:09:50 QC5-ubuntu systemd[1]: Dependency failed for /home. Nov 06 17:09:50 QC5-ubuntu systemd[1]: Dependency failed for Local File Systems. $ systemctl cat systemd-udev-settle.service ... [Service] Type=oneshot TimeoutSec=180 RemainAfterExit=yes ExecStart=/bin/udevadm settle ... One thing to notice is that I have resized the LVM volume groups for root and home a while ago, but my /etc/fstab was defined using the vg names instead of UUIDs, and hence the resizing volume groups shouldn't affect the booting to my understanding. I neither have the 70 -persistent-net.rules under the directory /etc/udev/rules.d/ as some people claimed in bug#758808 [0]. Below are some other information if they are helpful to identify the root cause. $ 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> /dev/mapper/ubuntuvg-root / btrfs defaults,subvol=@ 0 1 # /boot was on /dev/sdb9 during installation UUID=17371fe7-bcc3-4d5f-ac84-bafacda7a755 /boot ext4 defaults 0 2 # /boot/efi was on /dev/sdb7 during installation UUID=6226-94B9 /boot/efi vfat umask=0077 0 1 /dev/mapper/ubuntuvg-home /home btrfs defaults,subvol=@home 0 2 # swap was on /dev/sdb8 during installation UUID=6a636d29-c588-4bac-8100-f8b74acc89f0 none swap sw 0 0 # Mount Windows/NTFS paritions at startup. Use `sudo blkid` to check UUID and types. # /dev/sdb4 at /media/D. # /dev/sdb5 at /media/E # /dev/sda5 at /media/F # /dev/sda6 at /media/G # /dev/sda7 at /media/H # /dev/sda8 at /media/I UUID=BC34947B34943A7A /media/D ntfs-3g defaults,x-gvfs-name=D 0 0 UUID=B8969B72969B303C /media/E ntfs-3g defaults,x-gvfs-name=E 0 0 UUID=01D19EFB9C89C6F0 /media/F ntfs-3g defaults,x-gvfs-name=F 0 0 UUID=01D19EFB9F2C5E40 /media/G ntfs-3g defaults,x-gvfs-name=G 0 0 UUID=01D19EFBA1FD5890 /media/H ntfs-3g defaults,x-gvfs-name=H 0 0 UUID=01D19EFBA4C244F0 /media/I ntfs-3g defaults,x-gvfs-name=I 0 0 $ sudo blkid -c /dev/null [sudo] password for qxd: /dev/sda5: UUID="01D19EFB9C89C6F0" TYPE="ntfs" PARTUUID="5c52c803-05" /dev/sda6: UUID="01D19EFB9F2C5E40" TYPE="ntfs" PARTUUID="5c52c803-06" /dev/sda7: UUID="01D19EFBA1FD5890" TYPE="ntfs" PARTUUID="5c52c803-07" /dev/sda8: UUID="01D19EFBA4C244F0" TYPE="ntfs" PARTUUID="5c52c803-08" /dev/sdb1: PARTLABEL="Microsoft reserved partition" PARTUUID="e4c5d9eb-7071-47af-9b49-6df33d0a84e4" /dev/sdb2: UUID="62D24DCAD24DA2E1" TYPE="ntfs" PARTLABEL="Basic data partition" PARTUUID="d34e9363-6204-4e33-a0af-df60b66689d9" /dev/sdb3: UUID="9864FF1B64FEFAB8" TYPE="ntfs" PARTUUID="f12e75a5-5b15-4ff4-8ee5-d02bc023c4d9" /dev/sdb4: UUID="BC34947B34943A7A" TYPE="ntfs" PARTLABEL="Basic data partition" PARTUUID="21ec31b0-6b27-4293-8dd2-b2272ff8a08c" /dev/sdb5: UUID="B8969B72969B303C" TYPE="ntfs" PARTLABEL="Basic data partition" PARTUUID="c0be1cee-4d0b-4f6e-933b-436c9df72ff1" /dev/sdb6: LABEL="Recovery" UUID="368425CD84259083" TYPE="ntfs" PARTLABEL="Basic data partition" PARTUUID="ec9e9a8b-000b-4738-a967-a0c3466314b1" /dev/sdb7: UUID="6226-94B9" TYPE="vfat" PARTLABEL="EFI system partition" PARTUUID="da264794-e1d1-46fa-ae3c-8eb518d0ed76" /dev/sdb8: UUID="6a636d29-c588-4bac-8100-f8b74acc89f0" TYPE="swap" PARTLABEL="swap" PARTUUID="00592e8b-cec0-8cb4-f9be-f525165db200" /dev/sdb9: UUID="17371fe7-bcc3-4d5f-ac84-bafacda7a755" TYPE="ext4" PARTLABEL="boot" PARTUUID="afb77ad0-9ef9-01d1-6831-41c77ccfe800" /dev/sdb10: UUID="LMPn4c-DTWe-wQiY-5j2Y-Gl3Z-Wgpc-yf0H9Q" TYPE="LVM2_member" PARTLABEL="UbuntuPV" PARTUUID="ae5022c3-76e4-4814-8970-5bde4d60a196" /dev/mapper/ubuntuvg-root: UUID="19823387-670c-40f7-b9f9-4d426aba8403" UUID_SUB="f2ca33af-56d7-42fb-badd-6556deed289e" TYPE="btrfs" /dev/mapper/ubuntuvg-home: UUID="57a4804c-b014-4670-8029-6fea3389e04c" UUID_SUB="e9452046-f0dd-41da-bb95-9e72bbb4f1af" TYPE="btrfs" $ sudo fdisk -l [sudo] password for qxd: Disk /dev/sda: 465.8 GiB, 500107862016 bytes, 976773168 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disklabel type: dos Disk identifier: 0x5c52c803 Device Boot Start End Sectors Size Id Type /dev/sda1 1985 976766975 976764991 465.8G f W95 Ext'd (LBA) /dev/sda5 2048 209717247 209715200 100G 7 HPFS/NTFS/exFAT /dev/sda6 209719296 461371391 251652096 120G 7 HPFS/NTFS/exFAT /dev/sda7 461373440 713031679 251658240 120G 7 HPFS/NTFS/exFAT /dev/sda8 713033728 976766975 263733248 125.8G 7 HPFS/NTFS/exFAT Partition 1 does not start on physical sector boundary. Disk /dev/sdb: 447.1 GiB, 480103981056 bytes, 937703088 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disklabel type: gpt Disk identifier: A435690F-4CBF-4A64-A077-3060C978704F Device Start End Sectors Size Type /dev/sdb1 34 262177 262144 128M Microsoft reserved /dev/sdb2 264192 206365683 206101492 98.3G Microsoft basic data /dev/sdb3 206366720 209979391 3612672 1.7G Windows recovery environment /dev/sdb4 209979392 371460095 161480704 77G Microsoft basic data /dev/sdb5 371460096 623118335 251658240 120G Microsoft basic data /dev/sdb6 623118336 624039935 921600 450M Windows recovery environment /dev/sdb7 624039936 624244735 204800 100M EFI System /dev/sdb8 624244736 632428543 8183808 3.9G Linux swap /dev/sdb9 632428544 633145343 716800 350M Linux filesystem /dev/sdb10 633145344 937701375 304556032 145.2G Linux LVM Disk /dev/mapper/ubuntuvg-root: 35 GiB, 37580963840 bytes, 73400320 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk /dev/mapper/ubuntuvg-home: 110.2 GiB, 118350675968 bytes, 231153664 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes $ udevadm info /dev/mapper/ubuntuvg-home P: /devices/virtual/block/dm-1 N: dm-1 S: disk/by-id/dm-name-ubuntuvg-home S: disk/by-id/dm-uuid-LVM-UC1Z6TF5E9h92HxXZvZfpm1vuQfJWNjQAUrePOOqkcFH3wxIavxhZhyhkUn3zC9Q S: disk/by-uuid/57a4804c-b014-4670-8029-6fea3389e04c S: mapper/ubuntuvg-home S: ubuntuvg/home E: DEVLINKS=/dev/disk/by-id/dm-name-ubuntuvg-home /dev/ubuntuvg/home /dev/disk/by-uuid/57a4804c-b014-4670-8029-6fea3389e04c /dev/mapper/ubuntuvg-home /dev/disk/by-id/dm-uuid-LVM-UC1Z6TF5E9h92HxXZvZfpm1vuQfJWNjQAUrePOOqkcFH3wxIavxhZhyhkUn3zC9Q E: DEVNAME=/dev/dm-1 E: DEVPATH=/devices/virtual/block/dm-1 E: DEVTYPE=disk E: DM_ACTIVATION=1 E: DM_LV_NAME=home E: DM_NAME=ubuntuvg-home E: DM_SUSPENDED=0 E: DM_UDEV_DISABLE_LIBRARY_FALLBACK_FLAG=1 E: DM_UDEV_PRIMARY_SOURCE_FLAG=1 E: DM_UDEV_RULES=1 E: DM_UUID=LVM-UC1Z6TF5E9h92HxXZvZfpm1vuQfJWNjQAUrePOOqkcFH3wxIavxhZhyhkUn3zC9Q E: DM_VG_NAME=ubuntuvg E: ID_BTRFS_READY=1 E: ID_FS_TYPE=btrfs E: ID_FS_USAGE=filesystem E: ID_FS_UUID=57a4804c-b014-4670-8029-6fea3389e04c E: ID_FS_UUID_ENC=57a4804c-b014-4670-8029-6fea3389e04c E: ID_FS_UUID_SUB=e9452046-f0dd-41da-bb95-9e72bbb4f1af E: ID_FS_UUID_SUB_ENC=e9452046-f0dd-41da-bb95-9e72bbb4f1af E: MAJOR=253 E: MINOR=1 E: SUBSYSTEM=block E: TAGS=:systemd: E: USEC_INITIALIZED=96118179 $ ls -l /etc/udev/rules.d /lib/udev/rules.d/ /etc/udev/rules.d: total 16 -rw-r--r-- 1 root root 79 Nov 2 19:51 51-android.rules -rw-r--r-- 1 root root 921 Dec 3 2016 56-hpmud.rules -rw-r--r-- 1 root root 747 Oct 20 19:31 60-vboxdrv.rules -rw-r--r-- 1 root root 681 Nov 2 19:21 99-displaylink.rules /lib/udev/rules.d/: total 812 -rw-r--r-- 1 root root 552 Jan 4 2016 39-usbmuxd.rules -rw-r--r-- 1 root root 69 Nov 18 2014 40-crda.rules -rw-r--r-- 1 root root 381 Feb 28 2017 40-iio-sensor-proxy.rules -rw-r--r-- 1 root root 998 Oct 7 2014 40-usb-media-players.rules -rw-r--r-- 1 root root 35692 Nov 2 2015 40-usb_modeswitch.rules -rw-r--r-- 1 root root 613 Oct 27 04:11 40-vm-hotadd.rules -rw-r--r-- 1 root root 165 Mar 31 2016 50-apport.rules -rw-r--r-- 1 root root 113 Mar 1 2016 50-bluetooth-hci-auto-poweron.rules -rw-r--r-- 1 root root 210 Oct 26 20:22 50-firmware.rules -rw-r--r-- 1 root root 3310 Oct 27 04:11 50-udev-default.rules -rw-r--r-- 1 root root 5675 Oct 26 2015 55-Argyll.rules -rw-r--r-- 1 root root 6497 Apr 16 2016 55-dm.rules -rw-r--r-- 1 root root 921 Mar 29 2016 56-hpmud.rules -rw-r--r-- 1 root root 2446 Apr 16 2016 56-lvm.rules -rw-r--r-- 1 root root 606 Oct 27 04:11 60-block.rules -rw-r--r-- 1 root root 910 Oct 27 04:11 60-cdrom_id.rules -rw-r--r-- 1 root root 153 Oct 27 04:11 60-drm.rules -rw-r--r-- 1 root root 738 Oct 27 04:11 60-evdev.rules -rw-r--r-- 1 root root 583 May 5 2015 60-gnupg2.rules -rw-r--r-- 1 root root 3368 Dec 21 2015 60-gnupg.rules -rw-r--r-- 1 root root 329 Jan 8 2016 60-inputattach.rules -rw-r--r-- 1 root root 6107 Dec 10 2015 60-libgphoto2-6.rules -rw-r--r-- 1 root root 96634 Mar 30 2017 60-libsane.rules -rw-r--r-- 1 root root 912 Jun 28 2012 60-pcmcia.rules -rw-r--r-- 1 root root 616 Oct 27 04:11 60-persistent-alsa.rules -rw-r--r-- 1 root root 2464 Oct 27 04:11 60-persistent-input.rules -rw-r--r-- 1 root root 1495 Apr 16 2016 60-persistent-storage-dm.rules -rw-r--r-- 1 root root 5766 Oct 27 04:11 60-persistent-storage.rules -rw-r--r-- 1 root root 1420 Oct 27 04:11 60-persistent-storage-tape.rules -rw-r--r-- 1 root root 769 Oct 27 04:11 60-persistent-v4l.rules -rw-r--r-- 1 root root 1190 Oct 27 04:11 60-serial.rules -rw-r--r-- 1 root root 472 Aug 19 2016 60-xdiagnose.rules -rw-r--r-- 1 root root 292 Aug 13 2016 61-gnome-settings-daemon-rfkill.rules -rw-r--r-- 1 root root 456 Oct 27 04:11 61-persistent-storage-android.rules -rw-r--r-- 1 root root 418 Oct 27 04:11 64-btrfs.rules -rw-r--r-- 1 root root 257 Oct 13 08:17 64-xorg-xkb.rules -rw-r--r-- 1 root root 35481 Jun 22 17:23 65-libwacom.rules -rw-r--r-- 1 root root 157 Aug 8 00:31 66-snapd-autoimport.rules -rw-r--r-- 1 root root 606 Jul 6 15:10 66-xorg-synaptics-quirks.rules -rw-r--r-- 1 root root 5219 Nov 6 2015 69-cd-sensors.rules -rw-r--r-- 1 root root 165557 Jan 26 2016 69-libmtp.rules -rw-r--r-- 1 root root 4250 Apr 16 2016 69-lvm-metad.rules -rw-r--r-- 1 root root 155 Nov 2 21:42 69-mtp.rules -rw-r--r-- 1 root root 1142 Jul 6 15:04 69-wacom.rules -rw-r--r-- 1 root root 231 Oct 27 02:13 70-debian-uaccess.rules -rw-r--r-- 1 root root 734 Oct 27 04:11 70-mouse.rules -rw-r--r-- 1 root root 942 Oct 27 04:11 70-power-switch.rules -rw-r--r-- 1 root root 462 Mar 7 2016 70-printers.rules -rw-r--r-- 1 root root 226 Oct 23 10:44 70-resolvconf-initramfs-copy.rules -rw-r--r-- 1 root root 2591 Oct 27 04:11 70-uaccess.rules -rw-r--r-- 1 root root 2046 Oct 3 13:09 71-nvidia.rules -rw-r--r-- 1 root root 461 Oct 27 04:11 71-power-switch-proliant.rules -rw-r--r-- 1 root root 2710 Oct 27 04:11 71-seat.rules -rw-r--r-- 1 root root 429 Nov 18 2016 71-u-d-c-gpu-detection.rules -rw-r--r-- 1 root root 596 Oct 27 04:11 73-seat-late.rules -rw-r--r-- 1 root root 746 Oct 27 02:13 73-special-net-names.rules -rw-r--r-- 1 root root 608 Oct 27 02:13 73-usb-net-by-mac.rules -rw-r--r-- 1 root root 452 Oct 27 04:11 75-net-description.rules -rw-r--r-- 1 root root 174 Oct 27 04:11 75-probe_mtd.rules -rw-r--r-- 1 root root 484 Nov 4 2015 77-mm-cinterion-port-types.rules -rw-r--r-- 1 root root 6910 Nov 4 2015 77-mm-ericsson-mbm.rules -rw-r--r-- 1 root root 1734 Nov 4 2015 77-mm-huawei-net-port-types.rules -rw-r--r-- 1 root root 13187 Nov 4 2015 77-mm-longcheer-port-types.rules -rw-r--r-- 1 root root 2479 Nov 4 2015 77-mm-mtk-port-types.rules -rw-r--r-- 1 root root 2024 Nov 4 2015 77-mm-nokia-port-types.rules -rw-r--r-- 1 root root 383 Nov 4 2015 77-mm-pcmcia-device-blacklist.rules -rw-r--r-- 1 root root 514 Nov 4 2015 77-mm-platform-serial-whitelist.rules -rw-r--r-- 1 root root 3155 Nov 4 2015 77-mm-qdl-device-blacklist.rules -rw-r--r-- 1 root root 1840 Nov 4 2015 77-mm-simtech-port-types.rules -rw-r--r-- 1 root root 2929 Nov 4 2015 77-mm-telit-port-types.rules -rw-r--r-- 1 root root 6705 Nov 4 2015 77-mm-usb-device-blacklist.rules -rw-r--r-- 1 root root 2452 Nov 4 2015 77-mm-usb-serial-adapters-greylist.rules -rw-r--r-- 1 root root 3666 Nov 4 2015 77-mm-x22x-port-types.rules -rw-r--r-- 1 root root 14421 Nov 4 2015 77-mm-zte-port-types.rules -rw-r--r-- 1 root root 965 Oct 27 04:11 78-graphics-card.rules -rw-r--r-- 1 root root 4505 Oct 27 04:11 78-sound-card.rules -rw-r--r-- 1 root root 1375 Oct 26 20:22 80-debian-compat.rules -rw-r--r-- 1 root root 618 Oct 27 04:11 80-drivers.rules -rw-r--r-- 1 root root 190 Nov 30 2016 80-ifupdown.rules -rw-r--r-- 1 root root 277 Jul 5 23:06 80-libinput-device-groups.rules -rw-r--r-- 1 root root 796 Nov 4 2015 80-mm-candidate.rules -rw-r--r-- 1 root root 292 Oct 27 04:11 80-net-setup-link.rules -rw-r--r-- 1 root root 146 Aug 31 04:17 80-snappy-assign.rules -rw-r--r-- 1 root root 8179 Apr 1 2016 80-udisks2.rules -rw-r--r-- 1 root root 523 Feb 21 2017 84-nm-drivers.rules -rw-r--r-- 1 root root 10560 Apr 28 2016 85-brltty.rules -rw-r--r-- 1 root root 82 Mar 17 2016 85-hdparm.rules -rw-r--r-- 1 root root 1872 Apr 7 2016 85-hplj10xx.rules -rw-r--r-- 1 root root 396 Apr 4 2016 85-keyboard-configuration.rules -rw-r--r-- 1 root root 1682 Feb 21 2017 85-nm-unmanaged.rules -rw-r--r-- 1 root root 221 Nov 18 2014 85-regulatory.rules -rw-r--r-- 1 root root 1221 Aug 11 2015 85-tlp-rdw.rules -rw-r--r-- 1 root root 440 Aug 11 2015 85-tlp.rules -rw-r--r-- 1 root root 489 Apr 14 2016 90-alsa-restore.rules -rw-r--r-- 1 root root 1632 Aug 17 2016 90-fwupd-devices.rules -rw-r--r-- 1 root root 1850 Apr 13 2016 90-libgpod.rules -rw-r--r-- 1 root root 1451 Jul 5 23:06 90-libinput-model-quirks.rules -rw-r--r-- 1 root root 6640 Aug 23 06:27 90-pulseaudio.rules -rw-r--r-- 1 root root 847 Nov 6 2015 95-cd-devices.rules -rw-r--r-- 1 root root 2496 Jun 15 2016 95-upower-csr.rules -rw-r--r-- 1 root root 8109 Jun 15 2016 95-upower-hid.rules -rw-r--r-- 1 root root 354 Jun 15 2016 95-upower-wup.rules -rw-r--r-- 1 root root 1518 Sep 11 20:04 97-hid2hci.rules -rw-r--r-- 1 root root 3866 Oct 27 04:11 99-systemd.rules Thanks, Qi [0] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=758808 ** Bug watch added: Debian Bug tracker #758808 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=758808 ** Attachment added: "journalctloutput" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1730278/+attachment/5005140/+files/journalctl20171106kernel4.14.log -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1730278 Title: Udev slows down the bootup by a lot Status in linux package in Ubuntu: Confirmed Bug description: I think this is a bug as it started from recent updates (I don't remember when was the start). Basically, systemd-udev-settle takes 1min 30sec in the booting process. Since I use LVM and btrfs systems, I cannot mask the udev service from booting. Any insight would be appreciated. Below are some of my log. Computer: Lenovo Thinkpad P50, Ubuntu 16.04.3. $ uname -a Linux QC5-ubuntu 4.10.0-38-generic #42~16.04.1-Ubuntu SMP Tue Oct 10 16:32:20 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux $ sudo lspci -vvnn see https://paste.ubuntu.com/25900851/ $ journalctl -xb see https://paste.ubuntu.com/25900867/ $ systemd-analyze blame 1min 29.765s systemd-udev-settle.service 9.672s NetworkManager-wait-online.service 2.955s plymouth-quit-wait.service 2.449s upower.service 738ms lvm2-activation-early.service 645ms dev-mapper-ubuntuvg\x2droot.device 519ms nmbd.service 436ms grub-common.service 431ms sysfsutils.service 430ms dictd.service 430ms apport.service 423ms irqbalance.service 417ms plymouth-start.service 416ms speech-dispatcher.service 381ms ondemand.service 325ms vboxdrv.service 312ms media-I.mount 291ms lvm2-activation.service 237ms media-F.mount 213ms lvm2-monitor.service 170ms lvm2-activation-net.service 163ms systemd-hwdb-update.service 155ms media-H.mount ... $ system-analyze critical-chain systemd-udev-settle.service 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. systemd-udev-settle.service +1min 29.765s └─systemd-udev-trigger.service @427ms +60ms └─systemd-hwdb-update.service @263ms +163ms └─systemd-remount-fs.service @254ms +5ms └─systemd-journald.socket @175ms └─-.slice @167ms $ journalctl -b -u systemd-udev-settle.service -- Logs begin at Sun 2017-11-05 16:49:28 MST, end at Sun 2017-11-05 17:00:17 MST. -- Nov 05 16:49:28 QC5-ubuntu systemd[1]: Starting udev Wait for Complete Device Initialization... Nov 05 16:50:58 QC5-ubuntu systemd[1]: Started udev Wait for Complete Device Initialization. $ systemctl list-dependencies --reverse systemd-udev-settle.service systemd-udev-settle.service ● ├─lvm2-activation-early.service ● └─lvm2-activation.service $ sudo dmidecode see https://paste.ubuntu.com/25900903/ I have also tried the network service. The network manager needs a lot of time to boot up, but really? It requires internet to boot up? So, I check which services use it: $ systemctl show network-online.target | grep -E 'WantedBy|Before' WantedBy=whoopsie.service samba-ad-dc.service nmbd.service apt-daily.timer smbd.service Before=whoopsie.service nmbd.service smbd.service rc-local.service apt-daily.timer samba-ad-dc.service snapd.refresh.service Thanks, Qi To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1730278/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
