登录后，所有图标都无法点击，一段时间后光标移到右下角，屏幕刷新。这些事件不断重复发生。
我重新安装了 xorg 和 gnome-shell，但没有帮助。我已将 syslog 文件的内容粘贴在下面。
Jul 3 22:03:28 Inspiron-5559 systemd[1361]: gnome-shell-x11.service: State 'stop-sigterm' timed out. Killing.
Jul 3 22:03:28 Inspiron-5559 systemd[1361]: gnome-shell-x11.service: Killing process 4574 (gnome-shell) with signal SIGKILL.
Jul 3 22:03:28 Inspiron-5559 systemd[1361]: gnome-shell-x11.service: Main process exited, code=killed, status=9/KILL
Jul 3 22:03:28 Inspiron-5559 systemd[1361]: gnome-shell-x11.service: Failed with result 'timeout'.
Jul 3 22:03:28 Inspiron-5559 systemd[1361]: Failed to start GNOME Shell on X11.
Jul 3 22:03:28 Inspiron-5559 systemd[1361]: gnome-shell-x11.service: Scheduled restart job, restart counter is at 13.
Jul 3 22:03:28 Inspiron-5559 systemd[1361]: Stopped GNOME Shell on X11.
Jul 3 22:03:28 Inspiron-5559 systemd[1361]: Starting GNOME Shell on X11...
Jul 3 22:04:58 Inspiron-5559 systemd[1361]: gnome-shell-x11.service: start operation timed out. Terminating.
Jul 3 22:05:04 Inspiron-5559 systemd[1361]: gnome-shell-x11.service: State 'stop-sigterm' timed out. Killing.
Jul 3 22:05:04 Inspiron-5559 systemd[1361]: gnome-shell-x11.service: Killing process 4593 (gnome-shell) with signal SIGKILL.
Jul 3 22:05:04 Inspiron-5559 systemd[1361]: gnome-shell-x11.service: Killing process 4597 (gdbus) with signal SIGKILL.
Jul 3 22:05:04 Inspiron-5559 systemd[1361]: gnome-shell-x11.service: Main process exited, code=killed, status=9/KILL
Jul 3 22:05:04 Inspiron-5559 systemd[1361]: gnome-shell-x11.service: Failed with result 'timeout'.
Jul 3 22:05:04 Inspiron-5559 systemd[1361]: Failed to start GNOME Shell on X11.
Jul 3 22:05:04 Inspiron-5559 systemd[1361]: gnome-shell-x11.service: Scheduled restart job, restart counter is at 14.
Jul 3 22:05:04 Inspiron-5559 systemd[1361]: Stopped GNOME Shell on X11.
Jul 3 22:05:04 Inspiron-5559 systemd[1361]: Starting GNOME Shell on X11...