我使用命令“x11vnc -display :2”在远程计算机上启动 vnc 客户端。然后我尝试使用命令“xvnc4viewer”从本地计算机连接到它，然后它要求输入服务器名称并最终显示黑屏。
x11vnc 的输出：
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#@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@#
#@ @#
#@ ** WARNING ** WARNING ** WARNING ** WARNING ** @#
#@ @#
#@ YOU ARE RUNNING X11VNC WITHOUT A PASSWORD!! @#
#@ @#
#@ This means anyone with network access to this computer @#
#@ may be able to view and control your desktop. @#
#@ @#
#@ >>> If you did not mean to do this Press CTRL-C now!! <<< @#
#@ @#
#@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@#
#@ @#
#@ You can create an x11vnc password file by running: @#
#@ @#
#@ x11vnc -storepasswd password /path/to/passfile @#
#@ or x11vnc -storepasswd /path/to/passfile @#
#@ or x11vnc -storepasswd @#
#@ @#
#@ (the last one will use ~/.vnc/passwd) @#
#@ @#
#@ and then starting x11vnc via: @#
#@ @#
#@ x11vnc -rfbauth /path/to/passfile @#
#@ @#
#@ an existing ~/.vnc/passwd file from another VNC @#
#@ application will work fine too. @#
#@ @#
#@ You can also use the -passwdfile or -passwd options. @#
#@ (note -passwd is unsafe if local users are not trusted) @#
#@ @#
#@ Make sure any -rfbauth and -passwdfile password files @#
#@ cannot be read by untrusted users. @#
#@ @#
#@ Use x11vnc -usepw to automatically use your @#
#@ ~/.vnc/passwd or ~/.vnc/passwdfile password files. @#
#@ (and prompt you to create ~/.vnc/passwd if neither @#
#@ file exists.) Under -usepw, x11vnc will exit if it @#
#@ cannot find a password to use. @#
#@ @#
#@ @#
#@ Even with a password, the subsequent VNC traffic is @#
#@ sent in the clear. Consider tunnelling via ssh(1): @#
#@ @#
#@ http://www.karlrunge.com/x11vnc/#tunnelling @#
#@ @#
#@ Or using the x11vnc SSL options: -ssl and -stunnel @#
#@ @#
#@ Please Read the documention for more info about @#
#@ passwords, security, and encryption. @#
#@ @#
#@ http://www.karlrunge.com/x11vnc/faq.html#faq-passwd @#
#@ @#
#@ To disable this warning use the -nopw option, or put @#
#@ 'nopw' on a line in your ~/.x11vncrc file. @#
#@ @#
#@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@#
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14/10/2015 13:41:22 x11vnc version: 0.9.14 lastmod: 2010-12-27 pid: 9083
14/10/2015 13:41:22 Using X display :2
14/10/2015 13:41:22 rootwin: 0x4f reswin: 0x400001 dpy: 0x29bd4d0
14/10/2015 13:41:22
14/10/2015 13:41:22 ------------------ USEFUL INFORMATION ------------------
14/10/2015 13:41:22 X DAMAGE available on display, using it for polling hints.
14/10/2015 13:41:22 To disable this behavior use: '-noxdamage'
14/10/2015 13:41:22
14/10/2015 13:41:22 Most compositing window managers like 'compiz' or 'beryl'
14/10/2015 13:41:22 cause X DAMAGE to fail, and so you may not see any screen
14/10/2015 13:41:22 updates via VNC. Either disable 'compiz' (recommended) or
14/10/2015 13:41:22 supply the x11vnc '-noxdamage' command line option.
14/10/2015 13:41:22 X COMPOSITE available on display, using it for window polling.
14/10/2015 13:41:22 To disable this behavior use: '-noxcomposite'
14/10/2015 13:41:22
14/10/2015 13:41:22 Wireframing: -wireframe mode is in effect for window moves.
14/10/2015 13:41:22 If this yields undesired behavior (poor response, painting
14/10/2015 13:41:22 errors, etc) it may be disabled:
14/10/2015 13:41:22 - use '-nowf' to disable wireframing completely.
14/10/2015 13:41:22 - use '-nowcr' to disable the Copy Rectangle after the
14/10/2015 13:41:22 moved window is released in the new position.
14/10/2015 13:41:22 Also see the -help entry for tuning parameters.
14/10/2015 13:41:22 You can press 3 Alt_L's (Left "Alt" key) in a row to
14/10/2015 13:41:22 repaint the screen, also see the -fixscreen option for
14/10/2015 13:41:22 periodic repaints.
14/10/2015 13:41:22
14/10/2015 13:41:22 XFIXES available on display, resetting cursor mode
14/10/2015 13:41:22 to: '-cursor most'.
14/10/2015 13:41:22 to disable this behavior use: '-cursor arrow'
14/10/2015 13:41:22 or '-noxfixes'.
14/10/2015 13:41:22 using XFIXES for cursor drawing.
14/10/2015 13:41:22 GrabServer control via XTEST.
14/10/2015 13:41:22
14/10/2015 13:41:22 Scroll Detection: -scrollcopyrect mode is in effect to
14/10/2015 13:41:22 use RECORD extension to try to detect scrolling windows
14/10/2015 13:41:22 (induced by either user keystroke or mouse input).
14/10/2015 13:41:22 If this yields undesired behavior (poor response, painting
14/10/2015 13:41:22 errors, etc) it may be disabled via: '-noscr'
14/10/2015 13:41:22 Also see the -help entry for tuning parameters.
14/10/2015 13:41:22 You can press 3 Alt_L's (Left "Alt" key) in a row to
14/10/2015 13:41:22 repaint the screen, also see the -fixscreen option for
14/10/2015 13:41:22 periodic repaints.
14/10/2015 13:41:22
14/10/2015 13:41:22 XKEYBOARD: number of keysyms per keycode 7 is greater
14/10/2015 13:41:22 than 4 and 51 keysyms are mapped above 4.
14/10/2015 13:41:22 Automatically switching to -xkb mode.
14/10/2015 13:41:22 If this makes the key mapping worse you can
14/10/2015 13:41:22 disable it with the "-noxkb" option.
14/10/2015 13:41:22 Also, remember "-remap DEAD" for accenting characters.
14/10/2015 13:41:22
14/10/2015 13:41:22 X FBPM extension not supported.
14/10/2015 13:41:22 X DPMS extension not supported.
14/10/2015 13:41:22 --------------------------------------------------------
14/10/2015 13:41:22
14/10/2015 13:41:22 Default visual ID: 0x21
14/10/2015 13:41:22 Read initial data from X display into framebuffer.
14/10/2015 13:41:22 initialize_screen: fb_depth/fb_bpp/fb_Bpl 24/32/4096
14/10/2015 13:41:22
14/10/2015 13:41:22 X display :2 is 32bpp depth=24 true color
14/10/2015 13:41:22
14/10/2015 13:41:22 Autoprobing TCP port
14/10/2015 13:41:22 Autoprobing selected TCP port 5900
14/10/2015 13:41:22 Autoprobing TCP6 port
14/10/2015 13:41:22 Autoprobing selected TCP6 port 5900
14/10/2015 13:41:22 listen6: bind: Address already in use
14/10/2015 13:41:22 Not listening on IPv6 interface.
14/10/2015 13:41:22 fb read rate: 1900 MB/sec
14/10/2015 13:41:22 fast read: reset -wait ms to: 10
14/10/2015 13:41:22 fast read: reset -defer ms to: 10
14/10/2015 13:41:22 The X server says there are 10 mouse buttons.
14/10/2015 13:41:22 screen setup finished.
14/10/2015 13:41:22
14/10/2015 13:41:22 WARNING: You are running x11vnc WITHOUT a password. See
14/10/2015 13:41:22 WARNING: the warning message printed above for more info.
14/10/2015 13:41:22
The VNC desktop is: u-pl14:0
******************************************************************************
Have you tried the x11vnc '-ncache' VNC client-side pixel caching feature yet?
The scheme stores pixel data offscreen on the VNC viewer side for faster
retrieval. It should work with any VNC viewer. Try it by running:
x11vnc -ncache 10 ...
One can also add -ncache_cr for smooth 'copyrect' window motion.
More info: http://www.karlrunge.com/x11vnc/faq.html#faq-client-caching
14/10/2015 13:42:00 Got connection from client 195.113.16.31
14/10/2015 13:42:00 other clients:
14/10/2015 13:42:00 Normal socket connection
14/10/2015 13:42:00 Disabled X server key autorepeat.
14/10/2015 13:42:00 to force back on run: 'xset r on' (3 times)
14/10/2015 13:42:00 incr accepted_client=1 for 195.113.16.31:45948 sock=11
14/10/2015 13:42:00 Client Protocol Version 3.8
14/10/2015 13:42:00 Protocol version sent 3.8, using 3.8
14/10/2015 13:42:00 rfbProcessClientSecurityType: executing handler for type 1
14/10/2015 13:42:00 rfbProcessClientSecurityType: returning securityResult for client rfb version >= 3.8
14/10/2015 13:42:00 Pixel format for client 195.113.16.31:
14/10/2015 13:42:00 8 bpp, depth 6
14/10/2015 13:42:00 true colour: max r 3 g 3 b 3, shift r 4 g 2 b 0
14/10/2015 13:42:00 Enabling full-color cursor updates for client 195.113.16.31
14/10/2015 13:42:00 Enabling NewFBSize protocol extension for client 195.113.16.31
14/10/2015 13:42:00 Using ZRLE encoding for client 195.113.16.31
14/10/2015 13:42:01 client_set_net: 195.113.16.31 0.0004
14/10/2015 13:42:01 created xdamage object: 0x400024
14/10/2015 13:42:08 client_count: 0
14/10/2015 13:42:08 Restored X server key autorepeat to: 1
14/10/2015 13:42:08 viewer exited.
14/10/2015 13:42:08 deleted 32 tile_row polling images.
xvnc11viewer 的输出：
VNC Viewer Free Edition 4.1.1 for X - built Apr 2 2015 21:51:06
Copyright (C) 2002-2005 RealVNC Ltd.
See http://www.realvnc.com for information on VNC.
Server:
Wed Oct 14 13:42:00 2015
CConn: connected to host u-pl14.ms.mff.cuni.cz port 5900
CConnection: Server supports RFB protocol version 3.8
CConnection: Using RFB protocol version 3.8
TXImage: Using default colormap and visual, TrueColor, depth 24.
CConn: Using pixel format depth 6 (8bpp) rgb222
CConn: Using ZRLE encoding
有人能帮我吗？谢谢