can't start x server

when I want to use x server ,the following error was showed:

```bash
mininet@mininet-vm:~$ sudo wireshark &
[1] 1719
mininet@mininet-vm:~$ qt.qpa.xcb: X server does not support XInput 2
failed to get the current screen resources
QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-root'
The X11 connection broke: I/O error (code 1)
XIO: fatal IO error 0 (Success) on X server "localhost:10.0"
after 291 requests (286 known processed) with 0 events remaining
```

how to fix this error?and what's is its origin?

No source file, test, or project entry point is named; the report only provides a Wireshark launch command and X server error output. Start by reproducing the command in the stated Mininet VM and investigating the X11 connection and XInput support. Done means identifying the cause and documenting a verified fix.

Written by the indexing model from the issue text.