可能跟刚设置了指纹有关
因为进不去系统了，放几张图片
已重启电脑
已重启sddm服务
把指纹验证关了，马上就进去了 
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给大佬们看看日志
2023/7/4 下午8:55 sddm-greeter file:///usr/share/sddm/themes/breeze/components/VirtualKeyboard.qml:12:1: Type InputPanel unavailable
2023/7/4 下午8:55 sddm-greeter qrc:/QtQuick/VirtualKeyboard/content/InputPanel.qml:138:5: Type Keyboard unavailable
2023/7/4 下午8:55 sddm-greeter qrc:/QtQuick/VirtualKeyboard/content/components/Keyboard.qml:38:1: module "QtQuick.VirtualKeyboard.Plugins" is not installed
2023/7/4 下午8:55 sddm-greeter Adding view for "eDP" QRect(0,0 2560x1600)
2023/7/4 下午8:55 sddm-greeter Qt Quick Layouts: Polish loop detected. Aborting after two iterations.
2023/7/4 下午8:55 sddm-greeter Message received from daemon: Capabilities
2023/7/4 下午8:55 sddm-greeter Message received from daemon: HostName
2023/7/4 下午8:55 sddm-greeter Reading from "/usr/share/wayland-sessions/plasmawayland.desktop"
2023/7/4 下午8:55 sddm Message received from greeter: Login
2023/7/4 下午8:55 sddm Reading from "/usr/share/wayland-sessions/plasmawayland.desktop"
2023/7/4 下午8:55 sddm Reading from "/usr/share/wayland-sessions/plasmawayland.desktop"
2023/7/4 下午8:55 sddm Session "/usr/share/wayland-sessions/plasmawayland.desktop" selected, command: "/usr/lib/x86_64-linux-gnu/libexec/plasma-dbus-run-session-if-needed /usr/bin/startplasma-wayland"
2023/7/4 下午8:55 sddm-helper [PAM] Starting...
2023/7/4 下午8:55 sddm-helper [PAM] Authenticating...
2023/7/4 下午8:55 dbus-daemon [system] Activating via systemd: service name='net.reactivated.Fprint' unit='fprintd.service' requested by ':1.33' (uid=0 pid=1874 comm="/usr/lib/x86_64-linux-gnu/sddm/sddm-helper --socke")
2023/7/4 下午8:55 sddm-helper [PAM] Preparing to converse...
2023/7/4 下午8:55 sddm-helper [PAM] Conversation with 1 messages
2023/7/4 下午8:55 sddm Authentication information: "请把您的右手食指放在指纹读取器上"
2023/7/4 下午8:55 sddm-helper [PAM] Preparing to converse...
2023/7/4 下午8:55 sddm-helper [PAM] Conversation with 1 messages
2023/7/4 下午8:55 sddm Authentication information: "验证超时"
2023/7/4 下午8:55 sddm-helper [PAM] Preparing to converse...
2023/7/4 下午8:55 sddm-helper [PAM] Conversation with 1 messages
2023/7/4 下午8:56 sudo tim : TTY=tty5 ; PWD=/home/tim ; USER=root ; COMMAND=/usr/bin/systemctl restart sddm
2023/7/4 下午8:56 sddm Signal received: SIGTERM
2023/7/4 下午8:56 systemd Stopping sddm.service - Simple Desktop Display Manager...
2023/7/4 下午8:56 sddm Greeter stopping...
2023/7/4 下午8:56 sddm Socket server stopping...
2023/7/4 下午8:56 sddm Socket server stopped.
2023/7/4 下午8:56 sddm Display server stopping...
2023/7/4 下午8:56 sddm-greeter The X11 connection broke (error 1). Did the X11 server die?
2023/7/4 下午8:56 sddm Display server stopped.
2023/7/4 下午8:56 sddm Running display stop script "/usr/share/sddm/scripts/Xstop"
2023/7/4 下午8:56 sddm QProcess: Destroyed while process ("/usr/lib/x86_64-linux-gnu/sddm/sddm-helper") is still running.
2023/7/4 下午8:56 sddm Greeter stopping...
2023/7/4 下午8:56 sddm QProcess: Destroyed while process ("/usr/lib/x86_64-linux-gnu/sddm/sddm-helper") is still running.
2023/7/4 下午8:56 systemd sddm.service: Deactivated successfully.
2023/7/4 下午8:56 systemd Stopped sddm.service - Simple Desktop Display Manager.
2023/7/4 下午8:56 systemd Started sddm.service - Simple Desktop Display Manager.
2023/7/4 下午8:56 sddm Initializing...
2023/7/4 下午8:56 sddm Starting...
2023/7/4 下午8:56 sddm Logind interface found
2023/7/4 下午8:56 sddm Adding new display on vt 7 ...
2023/7/4 下午8:56 sddm Loading theme configuration from ""
2023/7/4 下午8:56 sddm Display server starting...
2023/7/4 下午8:56 sddm Adding cookie to "/var/run/sddm/{707cb0a1-9f09-4ed7-8037-af06d6d913b9}"
2023/7/4 下午8:56 sddm Running: /usr/bin/X -nolisten tcp -auth /var/run/sddm/{707cb0a1-9f09-4ed7-8037-af06d6d913b9} -background none -noreset -displayfd 17 -seat seat0 vt7
2023/7/4 下午8:56 sddm Setting default cursor
2023/7/4 下午8:56 sddm Running display setup script "/usr/share/sddm/scripts/Xsetup"
2023/7/4 下午8:56 sddm Display server started.
2023/7/4 下午8:56 sddm Socket server starting...
2023/7/4 下午8:56 sddm Socket server started.
2023/7/4 下午8:56 sddm Loading theme configuration from "/usr/share/sddm/themes/debian-breeze/theme.conf"
2023/7/4 下午8:56 sddm Greeter starting...
2023/7/4 下午8:56 sddm-helper [PAM] Starting...
2023/7/4 下午8:56 sddm-helper [PAM] Authenticating...
2023/7/4 下午8:56 sddm-helper [PAM] returning.
2023/7/4 下午8:56 sddm-helper pam_unix(sddm-greeter:session): session opened for user sddm(uid=115) by (uid=0)
2023/7/4 下午8:56 systemd-logind New session 5 of user sddm.
2023/7/4 下午8:56 systemd Started session-5.scope - Session 5 of User sddm.
2023/7/4 下午8:56 sddm Greeter session started successfully
2023/7/4 下午8:56 sddm-greeter High-DPI autoscaling not Enabled
2023/7/4 下午8:56 sddm-greeter Reading from "/usr/share/wayland-sessions/plasmawayland.desktop"
2023/7/4 下午8:56 sddm-greeter Reading from "/usr/share/xsessions/lightdm-xsession.desktop"
2023/7/4 下午8:56 sddm-greeter Reading from "/usr/share/xsessions/plasma.desktop"
2023/7/4 下午8:56 sddm-greeter Loading theme configuration from "/usr/share/sddm/themes/debian-breeze/theme.conf"
2023/7/4 下午8:56 sddm-greeter Connected to the daemon.
2023/7/4 下午8:56 sddm-greeter QFont::fromString: Invalid description '(empty)'
2023/7/4 下午8:56 sddm Message received from greeter: Connect
2023/7/4 下午8:56 sddm-greeter Loading file:///usr/share/sddm/themes/debian-breeze/Main.qml...
2023/7/4 下午8:56 sddm-greeter QObject: Cannot create children for a parent that is in a different thread.
(Parent is QGuiApplication(0x7ffdf4b238c0), parent's thread is QThread(0x557a7b43c0d0), current thread is QThread(0x557a7b589e10)
2023/7/4 下午8:56 sddm-greeter QObject: Cannot create children for a parent that is in a different thread.
(Parent is QGuiApplication(0x7ffdf4b238c0), parent's thread is QThread(0x557a7b43c0d0), current thread is QThread(0x557a7b589e10)
2023/7/4 下午8:56 sddm-greeter QObject: Cannot create children for a parent that is in a different thread.
(Parent is QGuiApplication(0x7ffdf4b238c0), parent's thread is QThread(0x557a7b43c0d0), current thread is QThread(0x557a7b589e10)
2023/7/4 下午8:56 sddm-greeter QObject::installEventFilter(): Cannot filter events for objects in a different thread.
2023/7/4 下午8:56 sddm-greeter file:///usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls.2/ToolButton.qml: QML IconImage: Error decoding: file:///usr/share/icons/breeze/actions/22/edit-copy.svg: 不支持的图像格式
2023/7/4 下午8:56 sddm-greeter Failed to find a Kirigami platform plugin
2023/7/4 下午8:56 sddm-greeter file:///usr/share/sddm/themes/breeze/components/VirtualKeyboard.qml:12:1: Type InputPanel unavailable
2023/7/4 下午8:56 sddm-greeter qrc:/QtQuick/VirtualKeyboard/content/InputPanel.qml:138:5: Type Keyboard unavailable
2023/7/4 下午8:56 sddm-greeter qrc:/QtQuick/VirtualKeyboard/content/components/Keyboard.qml:38:1: module "QtQuick.VirtualKeyboard.Plugins" is not installed
2023/7/4 下午8:56 sddm-greeter Adding view for "eDP" QRect(0,0 2560x1600)
2023/7/4 下午8:56 sddm-greeter Qt Quick Layouts: Polish loop detected. Aborting after two iterations.
2023/7/4 下午8:56 sddm-greeter Message received from daemon: Capabilities
2023/7/4 下午8:56 sddm-greeter Message received from daemon: HostName
2023/7/4 下午8:56 sddm-greeter Reading from "/usr/share/wayland-sessions/plasmawayland.desktop"
2023/7/4 下午8:56 sddm Message received from greeter: Login
2023/7/4 下午8:56 sddm Reading from "/usr/share/wayland-sessions/plasmawayland.desktop"
2023/7/4 下午8:56 sddm Reading from "/usr/share/wayland-sessions/plasmawayland.desktop"
2023/7/4 下午8:56 sddm Session "/usr/share/wayland-sessions/plasmawayland.desktop" selected, command: "/usr/lib/x86_64-linux-gnu/libexec/plasma-dbus-run-session-if-needed /usr/bin/startplasma-wayland"
2023/7/4 下午8:56 sddm-helper [PAM] Starting...
2023/7/4 下午8:56 sddm-helper [PAM] Authenticating...
2023/7/4 下午8:56 sddm-helper [PAM] Preparing to converse...
2023/7/4 下午8:56 sddm-helper [PAM] Conversation with 1 messages
2023/7/4 下午8:56 sddm-helper gkr-pam: unable to locate daemon control file
2023/7/4 下午8:56 sddm-helper gkr-pam: stashed password to try later in open session
2023/7/4 下午8:56 sddm-helper [PAM] returning.
2023/7/4 下午8:56 sddm-helper pam_kwallet5(sddm:auth): pam_kwallet5: pam_sm_authenticate
2023/7/4 下午8:56 sddm Authenticated successfully
2023/7/4 下午8:56 sddm-helper pam_kwallet5(sddm:setcred): pam_kwallet5: pam_sm_setcred
2023/7/4 下午8:56 sddm-helper pam_unix(sddm:session): session opened for user tim(uid=1000) by (uid=0)
2023/7/4 下午8:56 sddm-greeter Message received from daemon: LoginSucceeded
2023/7/4 下午8:56 sddm-helper gkr-pam: unlocked login keyring
2023/7/4 下午8:56 sddm-helper pam_kwallet5(sddm:session): pam_kwallet5: pam_sm_open_session
2023/7/4 下午8:56 sddm-helper pam_kwallet5: final socket path: /run/user/1000/kwallet5.socket
2023/7/4 下午8:56 sddm-helper pam_env(sddm:session): deprecated reading of user environment enabled
2023/7/4 下午8:56 sddm-helper Starting: "/etc/sddm/wayland-session /usr/lib/x86_64-linux-gnu/libexec/plasma-dbus-run-session-if-needed /usr/bin/startplasma-wayland"
2023/7/4 下午8:56 sddm-helper Jumping to VT 1
2023/7/4 下午8:56 sddm-helper VT mode didn't need to be fixed
2023/7/4 下午8:56 sddm-helper [PAM] Closing session
2023/7/4 下午8:56 sddm-helper pam_unix(sddm-greeter:session): session closed for user sddm
2023/7/4 下午8:56 sddm-helper [PAM] Ended.
2023/7/4 下午8:56 sddm Auth: sddm-helper exited successfully
2023/7/4 下午8:56 sddm Greeter stopped.
2023/7/4 下午8:56 sddm Session started
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找到相同问题啦
找到方案啦，在/etc/pam.d/sddm顶上加一行auth sufficient pam_fprintd.so