问题：vncviewer登录Ubuntu无显示
在"运行程序"里输入vncviewer 192.168.1.5:5900之后，什么显示也没有 ，ps看也没有vncviewer相关进程。
cbsd bls
JNAME JID VM_RAM VM_CURMEM VM_CPUS PCPU VM_OS_TYPE IP4_ADDR STATUS VNC
bub12 87023 3072 712 2 2 linux 192.168.1.12/24 On 0.0.0.0:5900
因为没有任何输出信息，无法查找问题，于是使用命令行执行vncviewer
在命令行输入：
vncviewer 192.168.1.5:5900
显示
vncviewer 192.168.1.5:5900
Connected to RFB server, using protocol version 3.8
Performing standard VNC authentication
Password:
Auth Failed: Invalid Password.
问题还是比较严重的，因为要VNC登录的是一台hbyve虚拟机，如果哪一天ssh服务出了问题，VNC再不能登录，这台服务器就彻底登不进去了。所以才会花大力气去寻求解决方案。
问题解决：原来是密码错误
按照这里的修改vnc密码：CBSD bhyve Ubuntu 配置vnc登录管理-CSDN博客
问题搞定。
也可以重启bhyve Ubuntu，重启的时候会显示出vnc密码。
重启命令：
cbsd brestart bub12
cbsd brestart bub12
Send SIGTERM to bub12. Soft timeout is 30 sec. 13 seconds left [................Send SIGTERM to bub12. Soft timeout is 30 sec. 12 seconds left [.................Send SIGTERM to bub12. Soft timeout is 30 sec. 0 seconds left [..............................]
bstop done in 16 seconds
VRDP is enabled. VNC bind/port: 192.168.1.5:5901
For attach VM console, use: vncviewer 192.168.1.5:5901
Resolution: 1024x768.
VNC pass: 123
Warning!!! You are running a system with open VNC port to the world wich is not secure
Please use IP filter or balancer with password to restrict VNC port access
Or change vnc_bind params to 127.0.0.1 and reboot VM after maintenance work
bhyve renice: 1
Waiting for PID.
PID: 87023
CBSD setup: bhyve ipfw counters num: 103/104
bstart done in 7 seconds
FreeBSD下登录VNC 软件包
在FreeBSD下登录VNC使用的是tightvnc软件包，这个软件包小巧实用，安装简单方便。在FreeBSD下使用pkg install tightvnc 安装，使用vncviewer IP:5900 来远程登录VNC server。
在尝试解决问题过程中，怀疑tightvnc软件包有问题，查看包信息发现没啥问题。
查看tightvnc包信息
pkg info tightvnc
tightvnc-1.3.10_9
Name : tightvnc
Version : 1.3.10_9
Installed on : Sat Jan 20 20:11:07 2024 CST
Origin : net/tightvnc
Architecture : FreeBSD:13:amd64
Prefix : /usr/local
Categories : net java
Licenses : GPLv2
Maintainer : dinoex@FreeBSD.org
WWW : https://www.tightvnc.com/
Comment : Enhanced version of VNC
Options :
JVNC_VIEWER : off
Shared Libs required:
libjpeg.so.8
libXt.so.6
libXpm.so.4
libXmu.so.6
libXext.so.6
libXaw.so.7
libX11.so.6
libSM.so.6
libICE.so.6
Annotations :
FreeBSD_version: 1302001
build_timestamp: 2024-01-14T22:59:22+0000
built_by : poudriere-git-3.4.0
cpe : cpe:2.3:a:tightvnc:tightvnc:1.3.10:::::freebsd13:x64:9
port_checkout_unclean: no
port_git_hash : bcee2795289
ports_top_checkout_unclean: no
ports_top_git_hash: 4a7e52dfb9d
repo_type : binary
repository : FreeBSD
Flat size : 2.33MiB
Description :
Enhanced version of VNC, called TightVNC (grown from the VNC Tight Encoder
project), which is optimized to work over slow network connections such as
low-speed modem links. While original VNC may be very slow when your
connection is not fast enough, with TightVNC you can work remotely almost
in real time in most environments. Besides bandwidth optimizations,TightVNC
also includes many other improvements, optimizations and bugfixes over VNC.
Note that TightVNC is free, cross-platform and compatible with the standard
VNC.
还尝试了安装其它vnc view软件调试
尝试安装tigervnc-viewer失败
pkg install tigervnc-viewer
安装的时候显示
pkg: cached package tigervnc-viewer-1.13.1_2: missing or size mismatch, cannot continue
Consider running 'pkg update -f'
Fetching tigervnc-viewer-1.13.1_2.pkg: 100% 296 KiB 303.6kB/s 00:01
pkg: cached package tigervnc-viewer-1.13.1_2: missing or size mismatch, fetching from remote
Fetching tigervnc-viewer-1.13.1_2.pkg: 100% 296 KiB 303.6kB/s 00:01
pkg: cached package tigervnc-viewer-1.13.1_2: missing or size mismatch, cannot continue
Consider running 'pkg update -f'
不明白怎么回事....
好几个vnc客户端安装的时候都报：
pkg: cached package wlvncc-s20240407: missing or size mismatch, cannot continue
Consider running 'pkg update -f'
这是怎么回事呢？
总结
FreeBSD下使用vncviewer登录bhyve虚拟机Ubuntu无显示，原来是VNC密码错误（忘记密码了），重设vnc密码搞定。注意重设密码后需要重启虚拟机。
另外即使不重设密码，重启时也能看到输出密码......果然重启大法非常管用！
到目前为止其它的一些vnc客户端安装没成功，先不管了，只要tightvnc能用就行。