Ubuntu 20.04.1 LTS 启动时间缓慢

Question

我刚刚在一台新电脑上安装了 Ubuntu，并且一直遇到超过 2 分钟的启动时间。我看到很多建议使用 systemd-analyze，但不确定如何根据我的情况进行解释。我在下面附上了 和 的输出systemd-analyze。systemd-analyze critical-chain非常感谢任何帮助。

$ systemd-analyze
Startup finished in 7.372s (firmware) + 5.319s (loader) + 3.706s (kernel) + 2min 22.911s (userspace) = 2min 39.309s 

$ systemd-analyze critical-chain
The time when unit became active or started is printed after the "@" character.
The time the unit took to start is printed after the "+" character.

graphical.target @2min 22.683s
└─multi-user.target @2min 22.683s
  └─snapd.seeded.service @1min 17.297s +497ms
    └─snapd.service @32.501s +44.790s
      └─basic.target @32.359s
        └─sockets.target @32.359s
          └─snapd.socket @32.358s +662us
            └─sysinit.target @32.251s
              └─systemd-timesyncd.service @31.837s +414ms
                └─systemd-tmpfiles-setup.service @30.880s +915ms
                  └─systemd-journal-flush.service @4.100s +26.779s
                    └─systemd-remount-fs.service @3.866s +165ms
                      └─systemd-journald.socket @3.526s
                        └─system.slice @3.524s
                          └─-.slice @3.524s

-----编辑-----硬件规格：

• 处理器：英特尔酷睿 i7-6700K 4 GHz 四核
• CPU 冷却器：Cooler Master Hyper 212 EVO 82.9 CFM 套筒轴承
• 主板：华硕 B150M-C Micro ATX LGA1151
• 内存：Corsair Vengeance RGB Pro 32 GB（2 x 16 GB）DDR4-3200 CL16
• 存储：Seagate BarraCuda 4 TB 2.5 英寸 5400RPM 内置硬盘
• 电源：安静！系统电源 9 600 W 80+ 铜牌认证 ATX

-----编辑 2-----systemd-anaylze critical-chain运行sudo apt autoremove --purge snapd和后的输出sudo reboot。

$ systemd-analyze critical-chain
The time when unit became active or started is printed after the "@" character.
The time the unit took to start is printed after the "+" character.

graphical.target @1min 30.725s
└─multi-user.target @1min 30.725s
  └─kerneloops.service @1min 396ms +66ms
    └─network-online.target @1min 389ms
      └─NetworkManager-wait-online.service @47.348s +13.040s
        └─NetworkManager.service @38.520s +8.823s
          └─dbus.service @38.517s
            └─basic.target @38.479s
              └─sockets.target @38.479s
                └─uuidd.socket @38.479s
                  └─sysinit.target @38.465s
                    └─systemd-timesyncd.service @38.109s +356ms
                      └─systemd-tmpfiles-setup.service @37.043s +1.028s
                        └─systemd-journal-flush.service @4.294s +32.747s
                          └─systemd-journald.service @3.840s +453ms
                            └─systemd-journald.socket @3.837s
                              └─-.mount @3.835s
                                └─system.slice @3.835s
                                  └─-.slice @3.835s