我必须通过以下方式将 Kubuntu 19.10 从内核 5.3.0-24-generic 回滚到 5.3.0-23-generic
sudo apt-get purge linux-image-5.3.0-24-generic
sudo apt-get purge linux-headers-5.3.0-24-generic
因为 PC 被锁定在登录屏幕上，没有鼠标移动或键盘输入，并且 CPU @ 100%（根据风扇速度）。之后，我可以再次登录。但 wifi 连接要求输入密码。输入密码时，它会不断询问。这有点奇怪，因为当我使用内核 5.4.0-23（现在处于活动状态）时，我从未遇到过这个问题。通过终端连接时：
sudo nmcli dev wifi connect <SSID> password <password>
我收到以下错误：
Error: Connection activation failed: (7) Secrets were required, but not provided.
这与我不提供任何密码时遇到的错误相同。我 100% 确定密码是正确的。我还更改了路由器中的密码，因此它不包含任何特殊字符，行为相同。根据 arch linux 论坛上的一些帖子，如果两个网络管理器处于活动状态，则可能会发生这种情况。我不确定是否是这种情况。输出systemctl list-unit-files --state=enabled：
UNIT FILE STATE
snap-core-8039.mount enabled
snap-core-8213.mount enabled
snap-core18-1265.mount enabled
snap-core18-1279.mount enabled
snap-freecad-4.mount enabled
snap-freecad-6.mount enabled
snap-freecad-8.mount enabled
snap-pycharm\x2dcommunity-167.mount enabled
snap-pycharm\x2dcommunity-169.mount enabled
acpid.path enabled
apport-autoreport.path enabled
cups.path enabled
accounts-daemon.service enabled
anacron.service enabled
apparmor.service enabled
atd.service enabled
autofs.service enabled
[email protected] enabled
avahi-daemon.service enabled
binfmt-support.service enabled
blk-availability.service enabled
bluetooth.service enabled
console-setup.service enabled
cron.service enabled
cups-browsed.service enabled
cups.service enabled
dbus-fi.w1.wpa_supplicant1.service enabled
dbus-org.bluez.service enabled
dbus-org.freedesktop.Avahi.service enabled
dbus-org.freedesktop.ModemManager1.service enabled
dbus-org.freedesktop.nm-dispatcher.service enabled
dbus-org.freedesktop.resolve1.service enabled
dbus-org.freedesktop.thermald.service enabled
dbus-org.freedesktop.timesync1.service enabled
dmesg.service enabled
e2scrub_reap.service enabled
[email protected] enabled
gpu-manager.service enabled
grub-initrd-fallback.service enabled
haveged.service enabled
irexec.service enabled
irqbalance.service enabled
kerneloops.service enabled
keyboard-setup.service enabled
lircd-setup.service enabled
lircd-uinput.service enabled
lircd.service enabled
lircmd.service enabled
lm-sensors.service enabled
lvm2-monitor.service enabled
ModemManager.service enabled
mpd.service enabled
network-manager.service enabled
networkd-dispatcher.service enabled
NetworkManager-dispatcher.service enabled
NetworkManager-wait-online.service enabled
NetworkManager.service enabled
nfs-kernel-server.service enabled
nfs-server.service enabled
nmbd.service enabled
ondemand.service enabled
portmap.service enabled
pppd-dns.service enabled
rpcbind.service enabled
rsync.service enabled
rsyslog.service enabled
secureboot-db.service enabled
setvtrgb.service enabled
smbd.service enabled
snapd.autoimport.service enabled
snapd.core-fixup.service enabled
snapd.seeded.service enabled
snapd.service enabled
snapd.system-shutdown.service enabled
spice-vdagent.service enabled
spice-vdagentd.service enabled
syslog.service enabled
systemd-resolved.service enabled
systemd-timesyncd.service enabled
teamviewerd.service enabled
thermald.service enabled
tlp-sleep.service enabled
tlp.service enabled
udisks2.service enabled
ufw.service enabled
unattended-upgrades.service enabled
vboxautostart-service.service enabled
vboxballoonctrl-service.service enabled
vboxdrv.service enabled
vboxweb-service.service enabled
whoopsie.service enabled
wpa_supplicant.service enabled
acpid.socket enabled
apport-forward.socket enabled
avahi-daemon.socket enabled
cups.socket enabled
dm-event.socket enabled
lircd.socket enabled
lvm2-lvmpolld.socket enabled
mpd.socket enabled
rpcbind.socket enabled
snapd.socket enabled
spice-vdagentd.socket enabled
uuidd.socket enabled
nfs-client.target enabled
remote-fs.target enabled
anacron.timer enabled
apt-daily-upgrade.timer enabled
apt-daily.timer enabled
e2scrub_all.timer enabled
fstrim.timer enabled
logrotate.timer enabled
man-db.timer enabled
motd-news.timer enabled
snapd.snap-repair.timer enabled
输出service --status-all：
[ + ] acpid
[ + ] alsa-utils
[ - ] anacron
[ + ] apparmor
[ + ] apport
[ + ] atd
[ + ] autofs
[ + ] avahi-daemon
[ + ] binfmt-support
[ + ] bluetooth
[ - ] console-setup.sh
[ + ] cron
[ - ] cryptdisks
[ - ] cryptdisks-early
[ + ] cups
[ + ] cups-browsed
[ + ] dbus
[ + ] ecbd
[ - ] gdomap
[ + ] grub-common
[ + ] haveged
[ - ] hwclock.sh
[ + ] irqbalance
[ + ] kerneloops
[ - ] keyboard-setup.sh
[ - ] kmod
[ + ] lircd
[ + ] lircmd
[ + ] lm-sensors
[ - ] lvm2
[ - ] lvm2-lvmpolld
[ + ] mpd
[ + ] network-manager
[ - ] nfs-common
[ + ] nfs-kernel-server
[ + ] nmbd
[ - ] plymouth
[ - ] plymouth-log
[ - ] pppd-dns
[ + ] procps
[ + ] rpcbind
[ - ] rsync
[ + ] rsyslog
[ - ] samba-ad-dc
[ - ] saned
[ + ] sddm
[ + ] smbd
[ - ] spice-vdagent
[ + ] tlp
[ + ] udev
[ + ] ufw
[ + ] unattended-upgrades
[ - ] uuidd
[ + ] whoopsie
[ - ] x11-common