Unable to get the server and client side using xpra

[bishnoi29nitin]

Describe the bug
I was trying to use xpra for the first time but facing some issues, not able to start the session.

I am using the xpra version - xpra v3.1.2-r25. when I run the xpra command on the server it does start the xpra session and gives xpra initialization error. On the server side I am trying to create a proxy server so that manys user can get connected to the server.

Below mentioned details are log file for the command - xpra start --ssl-cert=/usr/share/xpra/www/xpra-ssl.cert --ssl=on --start="/home/amplifier /path_of_program"

022-02-07 22:45:55,763 cannot access python uinput module:^[[0m
2022-02-07 22:45:55,763  No module named uinput^[[0m
_XSERVTransSocketUNIXCreateListener: ...SocketCreateListener() failed
_XSERVTransMakeAllCOTSServerListeners: server already running
_XSERVTransSocketUNIXCreateListener: ...SocketCreateListener() failed
_XSERVTransMakeAllCOTSServerListeners: server already running
_XSERVTransSocketUNIXCreateListener: ...SocketCreateListener() failed
_XSERVTransMakeAllCOTSServerListeners: server already running
_XSERVTransSocketUNIXCreateListener: ...SocketCreateListener() failed
_XSERVTransMakeAllCOTSServerListeners: server already running
_XSERVTransSocketUNIXCreateListener: ...SocketCreateListener() failed
_XSERVTransMakeAllCOTSServerListeners: server already running
_XSERVTransSocketUNIXCreateListener: ...SocketCreateListener() failed
_XSERVTransMakeAllCOTSServerListeners: server already running

X.Org X Server 1.20.4
X Protocol Version 11, Revision 0
Build Operating System:  3.10.0-957.1.3.el7.x86_64
Current Operating System: Linux 3.10
Build Date: 04 January 2022  05:44:44PM
Build ID: xorg-x11-server 1.20.4-17.el7_9
Current version of pixman: 0.34.0
        Before reporting problems, check http://wiki.x.org
        to make sure that you have the latest version.
Markers: (--) probed, (**) from config file, (==) default setting,
        (++) from command line, (!!) notice, (II) informational,
        (WW) warning, (EE) error, (NI) not implemented, (??) unknown.
(++) Log file: "/run/user/1020/xpra/Xorg.S200200.log", Time: Mon Feb  7 22:45:55 2022
(++) Using config file: "/etc/xpra/xorg.conf"
(==) Using system config directory "/usr/share/X11/xorg.conf.d"
/bin/Xorg: symbol lookup error: /usr/lib64/xorg/modules/input/mouse_drv.so: undefined symbol: xf86GetOS
xpra initialization error:
 xpra_Xdummy: did not provide a display number using displayfd

And the below details is for the command Start xpra proxy server, command - sudo xpra proxy :100 --wss-auth=pam --bind-wss=0.0.0.0:5905 --ssl-cert=/path_to_certificate --ssl=on

2022-02-07 23:18:47,352 created wss socket '0.0.0.0:5905'^[[0m
^[[33m2022-02-07 23:18:47,370 Warning: some of the sockets are in an unknown state:^[[0m
^[[33m2022-02-07 23:18:47,370  /root/.^[[0m
^[[33m2022-02-07 23:18:47,371  please wait as we allow the socket probing to timeout^[[0m
2022-02-07 23:18:53,404 created unix domain socket '/run/user/0/xpra/'^[[0m
2022-02-07 23:18:53,405 created unix domain socket '/run/xpra/^[[0m
2022-02-07 23:18:53,405 created unix domain socket '/root/.xpra/'^[[0m
^[[33m2022-02-07 23:18:53,405 Warning: missing sound module^[[0m
^[[33m2022-02-07 23:18:53,436 Warning: zlib is the only compressor enabled^[[0m
^[[33m2022-02-07 23:18:53,436  install and enable lz4 support for better performance^[[0m
2022-02-07 23:18:53,441 serving html content from '/usr/share/xpra/www'^[[0m
2022-02-07 23:18:53,490 xpra is ready.^[[0m
2022-02-07 23:18:53,490 xpra proxy version 3.1.2-r25 64-bit^[[0m
2022-02-07 23:18:53,491  uid=0 (root), gid=0 (root)^[[0m
2022-02-07 23:18:53,491  running with pid 173768 on Linux CentOS 7.5.1804 Core^[[0m

To Reproduce
Steps to reproduce the behavior:

1. server command - Start xpra proxy server, command - sudo xpra proxy :100 --wss-auth=pam --bind-wss=0.0.0.0:5905 --ssl-cert=/usr/share/xpra/www/xpra-ssl.cert --ssl=on
2. To start the visualizer command which is want to display using xpra on the web appilcation.
   xpra start --ssl-cert=/usr/share/xpra/www/xpra-ssl.cert --ssl=on --start="/home/amplifier /path_to_program"
3. client command - Start xpra-html5-client server using “npm run serve”
4. specific action to trigger the bug

System Information (please complete the following information):

• Server OS: Centos 7
• Client OS: Centos 7
• Xpra Server Version v3.1.2-r25
• Xpra Client Version xpra v4.0

[totaam]

You're using the wrong version of CentOS 7:

/bin/Xorg: symbol lookup error: /usr/lib64/xorg/modules/input/mouse_drv.so: undefined symbol: xf86GetOS

Solutions:

• ensure your CentOS is up to date - 7.9 is the current version
• use the repository path matching your CentOS version (7.6 or whatever)
• switch to Xvfb in /etc/xpra/conf.d/55_server_x11.conf

---

client command - Start xpra-html5-client server using “npm run serve”

This is not how your start the html5 client.