我已经从 18.04 LTS 更新到 18.10，在启动时，Ubuntu 冻结了近 30 秒。它总共打开了 2 分钟。我几乎尝试了所有方法，但没有找到解决方案。我查看了 apport.log，但似乎没什么问题。如果您能帮忙，我将不胜感激。
我的Xorg.0.log
[ 52.154] (**) Option "_source" "server/udev"
[ 52.155] (II) event6 - HP WMI hotkeys: is tagged by udev as: Keyboard Switch
[ 52.155] (II) event6 - HP WMI hotkeys: device is a keyboard
[ 52.155] (II) event6 - HP WMI hotkeys: device is a switch device
[ 52.155] (II) event6 - HP WMI hotkeys: device removed
[ 52.156] (**) Option "config_info" "udev:/sys/devices/virtual/input/input7/event6"
[ 52.156] (II) XINPUT: Adding extended input device "HP WMI hotkeys" (type: KEYBOARD, id 12)
[ 52.156] (**) Option "xkb_model" "pc105"
[ 52.156] (**) Option "xkb_layout" "tr"
[ 52.157] (II) event6 - HP WMI hotkeys: is tagged by udev as: Keyboard Switch
[ 52.157] (II) event6 - HP WMI hotkeys: device is a keyboard
[ 52.157] (II) event6 - HP WMI hotkeys: device is a switch device
[ 306.859] (**) Option "fd" "22"
[ 307.101] (II) event2 - Power Button: device removed
[ 307.101] (**) Option "fd" "25"
[ 307.101] (II) event1 - Power Button: device removed
[ 307.101] (**) Option "fd" "26"
[ 307.101] (II) event9 - HP Truevision HD: HP Truevision: device removed
[ 307.101] (**) Option "fd" "27"
[ 307.101] (II) event3 - AT Translated Set 2 keyboard: device removed
[ 307.101] (**) Option "fd" "28"
[ 307.101] (II) event4 - SynPS/2 Synaptics TouchPad: device removed
[ 307.101] (**) Option "fd" "29"
[ 307.101] (II) event5 - HP Wireless hotkeys: device removed
[ 307.101] (**) Option "fd" "30"
[ 307.101] (II) event6 - HP WMI hotkeys: device removed
[ 307.102] (II) UnloadModule: "libinput"
[ 307.102] (II) systemd-logind: releasing fd for 13:70
[ 307.124] (II) UnloadModule: "libinput"
[ 307.124] (II) systemd-logind: releasing fd for 13:69
[ 307.160] (II) UnloadModule: "libinput"
[ 307.160] (II) systemd-logind: releasing fd for 13:68
[ 307.200] (II) UnloadModule: "libinput"
[ 307.200] (II) systemd-logind: releasing fd for 13:67
[ 307.216] (II) UnloadModule: "libinput"
[ 307.216] (II) systemd-logind: releasing fd for 13:73
[ 307.256] (II) UnloadModule: "libinput"
[ 307.256] (II) systemd-logind: releasing fd for 13:65
[ 307.276] (II) UnloadModule: "libinput"
[ 307.276] (II) systemd-logind: releasing fd for 13:66
[ 307.423] (WW) xf86CloseConsole: KDSETMODE failed: Input/output error
[ 307.423] (WW) xf86CloseConsole: VT_GETMODE failed: Input/output error
[ 307.423] (WW) xf86CloseConsole: VT_ACTIVATE failed: Input/output error
[ 307.428] (II) Server terminated successfully (0). Closing log file.
我想说的是，当我使用非图形界面（tty1）启动 ubuntu 时，它会打开正常启动时间（大约 50 秒）。在 tty1 中，当我使用以下命令退出 tty1 时
sudo service gdm start
它延迟了大约 30 秒。问题可能与此有关，但我不知道它是什么。
这是我的 systemd-analyze 责任：
31.989s plymouth-quit-wait.service
13.739s udisks2.service
13.737s networkd-dispatcher.service
12.991s apport-autoreport.11.307s postfix@-.
10.601s preload.
10.480s ModemManager.
7.854s dev-sda6.device
7.359s networking.service
7.051s accounts-daemon.service
等等。
我的systemd分析关键链：
graphical.target @59.612s
└─multi-user.target @59.611s
└─fetchmail.service @38.552s +107ms
└─postfix.service @38.547s +2ms
└─[email protected] @27.239s +11.307s
└─network-online.target @27.227s
└─network.target @27.130s
└─networking.service @19.770s +7.359s
└─apparmor.service @16.702s +2.922s
└─local-fs.target @16.672s
└─run-user-1000.mount @38.508s
└─swap.target @12.240s
└─dev-disk-by\x2duuid-ea82a086\x2d632f\x2d4439\x2da022\x2d
└─dev-disk-by\x2duuid-ea82a086\x2d632f\x2d4439\x2da022\x