我正在双启动 Windows 10 和 Ubuntu，但 Ubuntu 启动时间太长了。Windows 10 大约需要 15 秒，而进入 Ubuntu 登录屏幕则需要近一分钟。启动感觉不对劲。
systemd-analyze blame 的输出：
20.604s dev-sda1.device
17.790s dev-loop3.device
17.743s dev-loop0.device
17.684s dev-loop1.device
17.356s dev-loop2.device
17.210s dev-loop5.device
17.206s dev-loop4.device
17.141s dev-loop13.device
17.105s dev-loop14.device
17.091s dev-loop11.device
17.064s dev-loop6.device
17.018s dev-loop10.device
16.965s dev-loop8.device
16.859s dev-loop12.device
16.843s dev-loop7.device
16.610s dev-loop15.device
16.151s dev-loop9.device
16.036s systemd-udevd.service
6.049s NetworkManager-wait-online.service
5.408s gpu-manager.service
5.359s snapd.service
4.272s networkd-dispatcher.service
3.919s thermald.service
3.697s NetworkManager.service
3.257s udisks2.service
2.497s systemd-journal-flush.service
2.124s accounts-daemon.service
1.966s networking.service
1.894s ModemManager.service
1.357s colord.service
1.166s fwupd.service
1.135s tlp.service
916ms systemd-modules-load.service
916ms systemd-sysctl.service
884ms keyboard-setup.service
881ms packagekit.service
872ms polkit.service
842ms snap-communitheme-1174.mount
810ms snap-communitheme-1168.mount
790ms grub-common.service
784ms snap-gnome\x2dsystem\x2dmonitor-51.mount
748ms snap-gnome\x2dcharacters-103.mount
718ms snap-core-4917.mount
666ms snap-gnome\x2dcalculator-238.mount
639ms snap-gnome\x2d3\x2d26\x2d1604-70.mount
592ms snap-gnome\x2dcharacters-124.mount
587ms apparmor.service
565ms kmod-static-nodes.service
564ms snap-gnome\x2dcalculator-180.mount
545ms speech-dispatcher.service
543ms snap-core-5328.mount
503ms snap-gtk\x2dcommon\x2dthemes-319.mount
480ms setvtrgb.service
473ms snap-gnome\x2dlogs-37.mount
459ms console-setup.service
445ms snap-gnome\x2dlogs-43.mount
394ms systemd-tmpfiles-setup.service
391ms avahi-daemon.service
390ms snap-libreoffice-80.mount
364ms [email protected]
329ms gdm.service
321ms systemd-remount-fs.service
307ms systemd-logind.service
277ms bluetooth.service
277ms sys-kernel-debug.mount
275ms ufw.service
270ms lm-sensors.service
268ms pppd-dns.service
263ms rsyslog.service
259ms plymouth-read-write.service
254ms wpa_supplicant.service
241ms upower.service
223ms dev-hugepages.mount
223ms dev-mqueue.mount
205ms nvidia-persistenced.service
201ms dev-disk-by\x2duuid-a67e8e78\x2d7b32\x2d4f85\x2db0f7\x2d5f112a9
189ms systemd-journald.service
177ms systemd-tmpfiles-setup-dev.service
176ms systemd-timesyncd.service
175ms systemd-resolved.service
168ms snap-gtk\x2dcommon\x2dthemes-701.mount
158ms snap-gnome\x2dsystem\x2dmonitor-57.mount
90ms systemd-update-utmp.service
82ms [email protected]
54ms systemd-fsck@dev-disk-by\x2duuid-9A77\x2dE65B.service
53ms systemd-random-seed.service
53ms bolt.service
49ms dns-clean.service
40ms snapd.seeded.service
39ms systemd-udev-trigger.service
38ms apport.service
23ms rtkit-daemon.service
22ms alsa-restore.service
13ms ureadahead-stop.service
9ms kerneloops.service
5ms boot-efi.mount
5ms systemd-update-utmp-runlevel.service
2ms systemd-user-sessions.service
2ms systemd-backlight@leds:asus::kbd_backlight.service
2ms systemd-backlight@backlight:intel_backlight.service
1ms sys-fs-fuse-connections.mount
1ms plymouth-quit-wait.service
1ms sys-kernel-config.mount
712us snapd.socket
以及 systemd-analyze 时间的输出：
Startup finished in 15.423s (kernel) + 34.495s (userspace) = 49.918s
在用户空间中，经过 33.357 秒后达到 graphic.target
这是正常的吗？处理器是 Intel® Core™ i7-8550U CPU @ 1.80GHz × 8，配备 16 GiB RAM。感谢您的帮助！