是否可以在屏幕外提供 XDMCP 服务？

提供 XDMCP 服务本身并不难。使用 XDM 进行一些配置就足够了。

但是XDM必须启动一个X进程并显示一些东西，如果有一些硬件问题，它就会启动。而在我看来，XDMCP 服务器是纯 CPU 任务。

那么，是否可以不使用显卡或屏幕提供XDMCP服务呢？就像在后台运行 Nginx 一样？

当我在我的情况下尝试它时，由 XDM 启动的 X 进程由于“未找到屏幕”而死亡。我不想关注修复它，因为本地监视器对我来说毫无意义。

我按照https://wiki.archlinux.org/index.php/XDMCP进行修改。xdm.log 说：

xdm info (pid 1048): Starting xdm 1.1.12
xdm error (pid 1048): error binding socket address 177: Cannot assign requested address
xdm info (pid 1048): Starting X server on :0

X.Org X Server 1.20.5
X Protocol Version 11, Revision 0
Build Operating System: Linux Arch Linux
Current Operating System: Linux 9b8258ba662e 4.14.122-rancher #1 SMP Tue May 28 01:50:21 UTC 2019 x86_64
Kernel command line: BOOT_IMAGE=../vmlinuz-4.14.122-rancher printk.devkmsg=on rancher.state.dev=LABEL=RANCHER_STATE rancher.state.wait panic=10 console=tty0  initrd=../initrd-v1.5.2
Build Date: 30 May 2019  06:44:40PM

Current version of pixman: 0.38.4
    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: "/var/log/Xorg.0.log", Time: Wed Jun  5 07:05:01 2019
(==) Using system config directory "/usr/share/X11/xorg.conf.d"
(EE) 
Fatal server error:
(EE) no screens found(EE) 
(EE) 
Please consult the The X.Org Foundation support 
     at http://wiki.x.org
 for help. 
(EE) Please also check the log file at "/var/log/Xorg.0.log" for additional information.
(EE) 
(EE) Server terminated with error (1). Closing log file.
xdm error (pid 1048): server unexpectedly died
xdm error (pid 1048): Server for display :0 can't be started, session disabled