我只运行 ubuntu，有 core i3 处理器、6Gb Ram 和 HDD 硬盘。我可以在 3 分钟内启动，现在时间增加了三倍，达到 9 分钟。看起来我回到了恐龙时代。任何帮助都是值得赞赏的：
1.以下是部分 dmesg 报告， 完整 dmesg 报告请点击此处
[ 185.357795] [drm] ib test on ring 5 succeeded
[ 315.282976] rfkill: input handler disabled
[ 325.564405] audit: type=1400 audit(1629455823.941:49): apparmor="DENIED" operation="capable" profile="/snap/snapd/12704/usr/lib/snapd/snap-confine" pid=1972 comm="snap-confine" capability=4 capname="fsetid"
[ 325.564414] audit: type=1400 audit(1629455823.941:50): apparmor="DENIED" operation="capable" profile="/snap/snapd/12704/usr/lib/snapd/snap-confine" pid=2134 comm="snap-confine" capability=4 capname="fsetid"
[ 389.111464] audit: type=1326 audit(1629455887.492:51): auid=1000 uid=1000 gid=1000 ses=2 subj=snap.snap-store.ubuntu-software pid=2134 comm="snap-store" exe="/snap/snap-store/547/usr/bin/snap-store" sig=0 arch=c000003e syscall=314 compat=0 ip=0x7efc87bd9639 code=0x50000
2.systemd-analyze blame 报告
systemd-analyze blame
1min 17.970s virtualbox.service
1min 312ms apport-autoreport.service
53.849s plymouth-quit-wait.service
50.136s [email protected]
42.343s snapd.service
34.585s networkd-dispatcher.service
33.416s dev-sda7.device
31.050s NetworkManager-wait-online.service
26.095s udisks2.service
25.766s systemd-journal-flush.service
25.318s teamviewerd.service
24.567s accounts-daemon.service
22.945s dev-loop11.device
22.845s dev-loop16.device
22.744s dev-loop10.device
22.597s dev-loop12.device
22.344s dev-loop17.device
22.185s dev-loop15.device
21.952s dev-loop9.device
21.838s dev-loop8.device
21.081s dev-loop13.device
20.473s dev-loop14.device
20.333s dev-loop2.device
20.264s dev-loop0.device
20.090s media-jobayer-SAJAL-DESKTOP13.08.20.mount
19.451s dev-loop1.device
18.845s dev-loop4.device
17.688s NetworkManager.service
17.222s dev-loop7.device
16.577s dev-loop3.device
16.376s dev-loop6.device
15.805s polkit.service
14.379s dev-loop5.device
13.753s avahi-daemon.service
13.242s ModemManager.service
12.887s switcheroo-control.service
12.133s thermald.service
12.132s systemd-logind.service
12.129s wpa_supplicant.service
3.systemd-analyze 关键链这里有更好的视野
graphical.target @3min 362ms
└─multi-user.target @3min 362ms
└─teamviewerd.service @1min 42.389s +25.318s
└─network-online.target @1min 41.999s
└─network.target @1min 10.946s
└─NetworkManager.service @53.257s +17.688s
└─dbus.service @53.253s
└─basic.target @53.060s
└─sockets.target @53.060s
└─snapd.socket @53.058s +1ms
└─sysinit.target @52.329s
└─snapd.apparmor.service @49.928s +2.400s
└─apparmor.service @46.061s +3.864s
└─systemd-journald.socket @9.663s
└─system.slice @9.659s
└─-.slice @9.659s