咖啡因在启动时崩溃：
valery@valery-P50-A-K4M:~$ caffeine
Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/Xlib/support/unix_connect.py", line 89, in get_socket
s.connect('/tmp/.X11-unix/X%d' % dno)
FileNotFoundError: [Errno 2] No such file or directory
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/usr/bin/caffeine", line 36, in <module>
ewmh = EWMH()
File "/usr/lib/python3/dist-packages/ewmh.py", line 50, in __init__
self.display = _display or display.Display()
File "/usr/lib/python3/dist-packages/Xlib/display.py", line 80, in __init__
self.display = _BaseDisplay(display)
File "/usr/lib/python3/dist-packages/Xlib/display.py", line 62, in __init__
display.Display.__init__(*(self, ) + args, **keys)
File "/usr/lib/python3/dist-packages/Xlib/protocol/display.py", line 58, in __init__
self.socket = connect.get_socket(name, host, displayno)
File "/usr/lib/python3/dist-packages/Xlib/support/connect.py", line 78, in get_socket
return getattr(mod, modname).get_socket(dname, host, dno)
File "/usr/lib/python3/dist-packages/Xlib/support/unix_connect.py", line 91, in get_socket
raise error.DisplayConnectionError(dname, str(val))
Xlib.error.DisplayConnectionError: Can't connect to display ":0": [Errno 2] No such file or directory
版本：
valery@valery-P50-A-K4M:~$ caffeine -V
caffeine 2.8.3
我的问题是：有什么方法可以解决这个问题或者是否有具有此类功能的程序？