我使用的是 T430 Thinkpad 笔记本电脑，上面装有 5.3.0-62-generic Ubuntu。今天早上我可以连接到我的家庭网络。但是到了晚上，也就是现在，由于出现错误，我无法连接到网络，根据 dmesg 的提示，错误信息如下（如果输出不必要，请见谅，这是我在这里的第一篇帖子）：
audit: type=1107 audit(1595014020.261:196): pid=1051 uid=103 auid=4294967295 ses=4294967295 msg='apparmor="DENIED" operation="dbus_signal" bus="system" path="/org/freedesktop/NetworkManager/ActiveConnection/4" interface="org.freedesktop.NetworkManager.Connection.Active" member="PropertiesChanged" name=":1.12" mask="receive" pid=2401 label="snap.telegram-desktop.telegram-desktop" peer_pid=1057 peer_label="unconfined"
exe="/usr/bin/dbus-daemon" sauid=103 hostname=? addr=? terminal=?'
[ 477.870889] audit: type=1107 audit(1595014065.447:197): pid=1051 uid=103 auid=4294967295 ses=4294967295 msg='apparmor="DENIED" operation="dbus_signal" bus="system" path="/org/freedesktop/NetworkManager" interface="org.freedesktop.NetworkManager" member="PropertiesChanged" name=":1.12" mask="receive" pid=2401 label="snap.telegram-desktop.telegram-desktop" peer_pid=1057 peer_label="unconfined"
exe="/usr/bin/dbus-daemon" sauid=103 hostname=? addr=? terminal=?'
[ 477.870985] audit: type=1107 audit(1595014065.447:198): pid=1051 uid=103 auid=4294967295 ses=4294967295 msg='apparmor="DENIED" operation="dbus_signal" bus="system" path="/org/freedesktop/NetworkManager/ActiveConnection/4" interface="org.freedesktop.NetworkManager.Connection.Active" member="PropertiesChanged" name=":1.12" mask="receive" pid=2401 label="snap.telegram-desktop.telegram-desktop" peer_pid=1057 peer_label="unconfined"
exe="/usr/bin/dbus-daemon" sauid=103 hostname=? addr=? terminal=?'
[ 477.871464] wlan0: deauthenticating from bc:ee:7b:65:f4:80 by local choice (Reason: 3=DEAUTH_LEAVING)
编辑：根据用户 guiverc 的要求，发布详细信息如下：
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 18.04.4 LTS
Release: 18.04
Codename: bionic