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Xvnc 和 Lightdm 连接到主显示器 :0 并远程登录

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Xvnc 和 Lightdm 连接到主显示器 :0 并远程登录

我想启用远程 VNC 登录到 debian 上的 lightdm 会话，以便我可以远程登录。我取消注释了 in [VNCServer]，/etc/lightdm/lightdm.conf然后重新启动lightdm.service

[VNCServer]
enabled=true
command=/usr/bin/Xvnc
port=5900
width=1024
height=768
depth=8

root@deb2:~# systemctl restart lightdm.service

端口 5900 现已开放，lightdm 正在监听

root@deb2:~# ss -ltnpu
Netid     State      Recv-Q     Send-Q                                Local Address:Port          Peer Address:Port     Process                                       
......
tcp       LISTEN     0          10                                          0.0.0.0:5900               0.0.0.0:*         users:(("lightdm",pid=1622,fd=11))

我创建一个本地 SSH 隧道，然后使用以下命令进行远程连接vncviewer：

admin@:~$ ssh -L 5900:localhost:5900 [email protected]


admin@:~$ vncviewer -Log *:stderr:100 127.0.0.1:5900


TigerVNC Viewer 64-bit v1.10.1
Built on: 2020-04-09 06:49
Copyright (C) 1999-2019 TigerVNC Team and many others (see README.rst)
See https://www.tigervnc.org for information on TigerVNC.

Fri Apr 29 14:29:48 2022
 DecodeManager: Detected 2 CPU core(s)
 DecodeManager: Creating 2 decoder thread(s)
 TcpSocket:   Connecting to 192.168.1.241 [192.168.1.241] port 5900
 CConn:       Connected to host 192.168.1.241 port 5900
 CConnection: reading protocol version
 CConn:       End of stream

如您所见，VNC 连接但随后立即退出。

在 lightdm 日志中/var/log/lightdm/lightdm.log（粘贴在这里) 我看到连接已接收并且显示服务器已启动但随后它似乎立即关闭。

我还想实际连接到本地机器上实际运行的显示器（即显示器：0），而不是创建新的显示器这似乎就是这里发生的事情：

[+27.51s] DEBUG: Launching process 2119: /usr/bin/Xvnc :1 -auth /var/run/lightdm/root/:1 -nolisten tcp -inetd -geometry 1024x768 -depth 8
[+27.52s] DEBUG: XServer 1: Waiting for ready signal from X server :1

正如您所看到的，Xvnc 被调用时显示的是显示号 :1，而不是 :0，而这正是我想要的

/usr/bin/Xvnc :1 -auth /var/run/lightdm/root/:1 -nolisten tcp -inetd -geometry 1024x768 -depth 8

我真的很感激任何关于如何实现这个功能的想法，谢谢！

[+27.51s] DEBUG: Got VNC connection from 127.0.0.1:44548
[+27.51s] DEBUG: Seat vnc1: Loading properties from config section Seat:*
[+27.51s] DEBUG: Seat vnc1: Starting
[+27.51s] DEBUG: Seat vnc1: Creating greeter session
[+27.51s] DEBUG: Seat vnc1: Creating display server of type x
[+27.51s] DEBUG: XServer 1: Logging to /var/log/lightdm/x-1.log
[+27.51s] DEBUG: XServer 1: Writing X server authority to /var/run/lightdm/root/:1
[+27.51s] DEBUG: XServer 1: Launching X Server
[+27.51s] DEBUG: Launching process 2119: /usr/bin/Xvnc :1 -auth /var/run/lightdm/root/:1 -nolisten tcp -inetd -geometry 1024x768 -depth 8
[+27.52s] DEBUG: XServer 1: Waiting for ready signal from X server :1
[+27.52s] DEBUG: Registering seat with bus path /org/freedesktop/DisplayManager/Seat2
[+27.55s] DEBUG: Process 2119 exited with return value 1
[+27.55s] DEBUG: XServer 1: X server stopped
[+27.55s] DEBUG: XServer 1: Removing X server authority /var/run/lightdm/root/:1
[+27.55s] DEBUG: Seat vnc1: Display server stopped
[+27.55s] DEBUG: Seat vnc1: Stopping session
[+27.55s] DEBUG: Seat vnc1: Session stopped
[+27.55s] DEBUG: Seat vnc1: Stopping display server, no sessions require it
[+27.55s] DEBUG: Seat vnc1: Stopping; greeter display server failed to start
[+27.55s] DEBUG: Seat vnc1: Stopping
[+27.55s] DEBUG: Seat vnc1: Stopped



root@deb2:~# update-alternatives --query Xvnc
Name: Xvnc
Link: /usr/bin/Xvnc
Slaves:
 Xvnc.1.gz /usr/share/man/man1/Xvnc.1.gz
Status: auto
Best: /usr/bin/Xtigervnc
Value: /usr/bin/Xtigervnc

Alternative: /usr/bin/Xtigervnc
Priority: 80
Slaves:
 Xvnc.1.gz /usr/share/man/man1/Xtigervnc.1.gz
root@deb2:~# 
root@deb2:/var/log/lightdm# ls -lat /usr/bin/Xvnc lrwxrwxrwx 1 root root 22 Apr 26 11:04 /usr/bin/Xvnc -> /etc/alternatives/Xvnc

答案1

我认为问题与添加到 Xvnc 调用的默认 -depth 8 参数有关。最近版本已删除对 8 位深度的支持。请参阅：https://github.com/canonical/lightdm/pull/265/commits/02e3d25724a9df88631b4c7c5f0dab409db6a0a2。

我遇到了同样的问题，导致 X 服务器（与 Xvnc 捆绑在一起）出现致命错误。

答案2

不知道为什么这不起作用，但我已经使用 xinetd 实现了我想要的

在您的工作机器上，apt-get install xinetd tigervnc-standalone-server编辑并/etc/lightdm/lightdm.conf包含以下行：

[XDMCPServer]
enabled=true
port=177
listen-address=localhost

/etc/xinetd.d/Xvnc使用以下内容创建：

service xvnc_1
{
    type = UNLISTED
    disable = no
    protocol = tcp
    socket_type = stream
    bind = 127.0.0.1
    port = 5900
    wait = yes
    user = root
    server = /usr/bin/Xvnc
    server_args = :1 -inetd -query localhost -geometry 1600x1200 -depth 24 -once -fp /usr/share/fonts/X11/misc -DisconnectClients=0 -NeverShared -SecurityTypes None
}

要在所有接口上启用监听，请删除上面的几行：

listen-address=localhost
bind = 127.0.0.1

现在重新启动 xinetd 和 lightdm：systemctl restart xinetd lightdm

来源：https://users.dcs.aber.ac.uk/auj/en/office-remote-linux/

此外，要禁用任何身份验证消息，请参阅以下有关设置正确的 polkit 策略的文章：https://c-nergy.be/blog/?p=12073

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