我最近從 21.04 升級到 21.10，升級很順利，沒有錯誤或任何問題，但現在 Ubuntu 隨機關閉。但也沒有崩潰。關閉提示會隨機出現，並提供立即關閉或通過 60 秒倒數取消的選項，就好像我已經告訴它關閉一樣，但即使我立即點擊取消，計算機也會關閉。
（這是在 System 76 Lemur 上進行的，在升級之前沒有出現此問題。）
抱歉，我對細節有點了解，我不確定什麼是相關的，因為我不知道什麼會導致它彈出關閉對話框，然後無論如何都關閉？
編輯以根據要求添加 /var/log/syslog 中的相關部分。抱歉花了這麼長時間才添加。今天早些時候，它在 20 分鐘內自動關閉了兩次，但是，當然，當我等待找到它檢查日誌的確切時間時，因為我不記得之前的確切時間，它需要 2+小時再次自行關閉。無論如何，這是最後一次關閉的系統日誌，這是整整一分鐘，所以我希望導致問題的原因都在那裡。我看了看那是什麼，但這超出了我的範圍。
Nov 7 22:02:10 mildred systemd[1]: fwupd.service: Deactivated successfully.
Nov 7 22:02:51 mildred NetworkManager[3396]: <info> [1636340571.9197] manager: NetworkManager state is now CONNECTED_SIT
Nov 7 22:02:51 mildred dbus-daemon[3395]: [system] Activating via systemd: service name='org.freedesktop.nm_dispatcher' unit='dbus-org.freedesktop.nm-dispatcher.service' requested by ':1.7' (uid=0 pid=3396 comm="/usr/sbin/NetworkManager --no-daemon " label="unconfined")
Nov 7 22:02:51 mildred telegram-deskto[5110]: GDBus.Error:org.freedesktop.portal.Error.NotAllowed: This call is not available inside the sandbox
Nov 7 22:02:51 mildred systemd[1]: Starting Network Manager Script Dispatcher Service...
Nov 7 22:02:51 mildred systemd[1]: Starting Laptop Mode Tools - Battery Polling Service...
Nov 7 22:02:51 mildred systemd[1]: lmt-poll.service: Deactivated successfully.
Nov 7 22:02:51 mildred sh[10132]: laptop-mode: Battery polling disabled
Nov 7 22:02:51 mildred systemd[1]: Finished Laptop Mode Tools - Battery Polling Service.
Nov 7 22:02:51 mildred dbus-daemon[3395]: [system] Successfully activated service 'org.freedesktop.nm_dispatcher'
Nov 7 22:02:51 mildred systemd[1]: Started Network Manager Script Dispatcher Service.
Nov 7 22:02:51 mildred whoopsie[4648]: [22:02:51] Cannot reach: https://daisy.ubuntu.com
Nov 7 22:02:51 mildred whoopsie[4648]: [22:02:51] offline
Nov 7 22:02:51 mildred NetworkManager[3396]: <info> [1636340571.9972] manager: NetworkManager state is now CONNECTED_GLOBAL
Nov 7 22:02:52 mildred telegram-deskto[5110]: GDBus.Error:org.freedesktop.portal.Error.NotAllowed: This call is not available inside the sandbox
Nov 7 22:02:52 mildred whoopsie[4648]: [22:02:52] Cannot reach: https://daisy.ubuntu.com
Nov 7 22:02:52 mildred whoopsie[4648]: [22:02:52] The default IPv4 route is: /org/freedesktop/NetworkManager/ActiveConnection/1
Nov 7 22:02:52 mildred whoopsie[4648]: [22:02:52] Not a paid data plan: /org/freedesktop/NetworkManager/ActiveConnection/1
Nov 7 22:02:52 mildred whoopsie[4648]: [22:02:52] Found usable
connection: /org/freedesktop/NetworkManager/ActiveConnection/1
Nov 7 22:02:52 mildred telegram-deskto[5110]: GDBus.Error:org.freedesktop.portal.Error.NotAllowed: This call is not available inside the sandbox
Nov 7 22:02:52 mildred whoopsie[4648]: [22:02:52] online