它最近已重新加载，但启动却花费了大量的时间。
我已经附加了 dmesg 日志的尾部，尽管我不太清楚其中的含义，所以我需要一些提示，比如在哪里查找以及我可能需要做什么。
那么，这是否意味着 snd_hda_codec_hdmi 需要 16 秒才能完成，或者 rfkill：输入处理程序禁用需要 16 秒才能完成？
dmesg 尾部
[ 31.423513] IPv6: ADDRCONF(NETDEV_CHANGE): enp2s0: link becomes ready
[ 32.207818] audit: type=1400 audit(1519758834.340:47): apparmor="STATUS" operation="profile_replace" info="same as current profile, skipping" profile="unconfined" name="snap.slack.slack" pid=1592 comm="apparmor_parser"
[ 33.370335] audit: type=1400 audit(1519758835.503:48): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="/snap/core/4110/usr/lib/snapd/snap-confine" pid=1615 comm="apparmor_parser"
[ 33.384467] audit: type=1400 audit(1519758835.517:49): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="/snap/core/4110/usr/lib/snapd/snap-confine//mount-namespace-capture-helper" pid=1615 comm="apparmor_parser"
[ 33.384726] audit: type=1400 audit(1519758835.517:50): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="/snap/core/4110/usr/lib/snapd/snap-confine//snap_update_ns" pid=1615 comm="apparmor_parser"
[ 33.566711] audit: type=1400 audit(1519758835.699:51): apparmor="STATUS" operation="profile_replace" info="same as current profile, skipping" profile="unconfined" name="snap.core.hook.configure" pid=1670 comm="apparmor_parser"
[ 34.756264] audit: type=1400 audit(1519758836.889:52): apparmor="STATUS" operation="profile_replace" info="same as current profile, skipping" profile="unconfined" name="snap.datagrip.datagrip" pid=1738 comm="apparmor_parser"
[ 35.523826] audit: type=1400 audit(1519758837.656:53): apparmor="STATUS" operation="profile_replace" info="same as current profile, skipping" profile="unconfined" name="snap.discord.discord" pid=1777 comm="apparmor_parser"
[ 39.206997] audit: type=1400 audit(1519758841.339:54): apparmor="STATUS" operation="profile_load" profile="unconfined" name="docker-default" pid=1924 comm="apparmor_parser"
[ 45.475862] nvidia-modeset: Allocated GPU:0 (GPU-734a2991-20e6-aaeb-57d1-343f4d445979) @ PCI:0000:01:00.0
[ 52.324100] snd_hda_codec_hdmi hdaudioC2D0: HDMI: invalid ELD data byte 13
[ 69.792131] bridge: filtering via arp/ip/ip6tables is no longer available by default. Update your scripts to load br_netfilter if you need this.
[ 69.794302] Bridge firewalling registered
[ 69.892720] nf_conntrack version 0.5.0 (65536 buckets, 262144 max)
[ 70.690942] Initializing XFRM netlink socket
[ 70.725823] Netfilter messages via NETLINK v0.30.
[ 70.733375] ctnetlink v0.93: registering with nfnetlink.
[ 71.358229] IPv6: ADDRCONF(NETDEV_UP): br-46abd666c673: link is not ready
[ 71.401112] IPv6: ADDRCONF(NETDEV_UP): br-6dda0bd6942c: link is not ready
[ 71.449784] IPv6: ADDRCONF(NETDEV_UP): br-a09ff5d997e8: link is not ready
[ 71.635022] IPv6: ADDRCONF(NETDEV_UP): br-a4e04f927837: link is not ready
[ 71.682636] IPv6: ADDRCONF(NETDEV_UP): docker0: link is not ready
[ 86.887899] snd_hda_codec_hdmi hdaudioC2D0: HDMI: invalid ELD data byte 70
[ 90.595490] snd_hda_codec_hdmi hdaudioC2D0: HDMI: invalid ELD data byte 14
[ 106.470249] rfkill: input handler disabled
systemd-analyze 责备
24.081s docker.service
22.958s plymouth-quit-wait.service
9.133s snapd.service
4.965s dev-mapper-ubuntu\x2d\x2dvg\x2droot.device
4.570s NetworkManager-wait-online.service
4.371s systemd-udev-settle.service
4.365s NetworkManager.service
4.030s udisks2.service
3.784s ModemManager.service
3.572s accounts-daemon.service
3.003s networking.service
2.630s dev-loop8.device
2.554s dev-loop9.device
2.498s polkit.service
2.460s gpu-manager.service
2.205s dev-loop12.device
2.154s dev-loop10.device
2.051s dev-loop11.device
2.039s grub-common.service
2.030s dev-loop13.device
1.970s snap-datagrip-7.mount
1.917s apparmor.service
1.726s fwupd.service
1.574s thermald.service
1.439s systemd-tmpfiles-setup.service
1.340s plymouth-read-write.service
1.330s rsyslog.service
1.321s apport.service
1.218s snap-datagrip-6.mount
1.201s snap-gnome\x2d3\x2d26\x2d1604-27.mount
1.033s dev-loop6.device
1.021s snap-core-4110.mount
967ms snap-phpstorm-15.mount
926ms snap-core-4017.mount
900ms snap-peek-711.mount
880ms systemd-fsck@dev-disk-by\x2duuid-D853\x2d2306.service
815ms packagekit.service
795ms systemd-logind.service
795ms lm-sensors.service
794ms avahi-daemon.service
790ms speech-dispatcher.service
784ms dev-loop2.device
773ms snap-google\x2dplay\x2dmusic\x2ddesktop\x2dplayer-47.mount
771ms snap-slack-4.mount
705ms keyboard-setup.service
661ms dev-loop5.device
643ms snap-datagrip-5.mount
625ms dns-clean.service
563ms systemd-modules-load.service
498ms dev-mqueue.mount
497ms dev-hugepages.mount
495ms sys-kernel-debug.mount
459ms systemd-tmpfiles-setup-dev.service
458ms snap-discord-52.mount
451ms dev-loop0.device
448ms boot-efi.mount
443ms ufw.service
433ms dev-loop7.device
423ms lvm2-activation-early.service
416ms pppd-dns.service
414ms alsa-restore.service
389ms systemd-journald.service
365ms systemd-udevd.service
321ms snap-phpstorm-13.mount
311ms snap-core-3887.mount
300ms systemd-timesyncd.service
287ms upower.service
274ms console-setup.service
251ms gdm.service
243ms systemd-resolved.service
224ms systemd-localed.service
218ms wpa_supplicant.service
206ms kmod-static-nodes.service
191ms kerneloops.service
184ms systemd-hostnamed.service
170ms plymouth-start.service
167ms systemd-timedated.service
165ms systemd-sysctl.service
161ms colord.service
159ms dev-loop4.device
138ms systemd-backlight@backlight:acpi_video0.service
137ms NetworkManager-dispatcher.service
132ms dev-loop3.device
132ms systemd-update-utmp.service
128ms systemd-udev-trigger.service
125ms snap-phpstorm-14.mount
124ms systemd-user-sessions.service
103ms lvm2-monitor.service
83ms lvm2-activation.service
74ms dev-mapper-ubuntu\x2d\x2dvg\x2dswap_1.swap
57ms [email protected]
57ms systemd-remount-fs.service
51ms [email protected]
49ms systemd-journal-flush.service
44ms rtkit-daemon.service
28ms setvtrgb.service
26ms systemd-backlight@backlight:acpi_video1.service
24ms systemd-random-seed.service
15ms snapd.socket
15ms docker.socket
12ms systemd-update-utmp-runlevel.service
4ms sys-fs-fuse-connections.mount
3ms sys-kernel-config.mount
3ms nvidia-persistenced.service
2ms dev-loop1.device
/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/ubuntu--vg-root / ext4 errors=remount-ro 0 1
# /boot/efi was on /dev/sda1 during installation
UUID=D853-2306 /boot/efi vfat umask=0077 0 1
/dev/mapper/ubuntu--vg-swap_1 none swap sw 0 0