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= FAQ =
== High CPU usage in X when VNC client is connected ==
Various causes between X versions and display driver may cause this issue. Below solutions attempt to fix:

=== Add parameters in x11vnc command line ===
If you are using x11vnc, you may try different parameters, one at a time, to see if it fix the issue
{{{
-noxfixes
}}}

{{{
-nobell
}}}

{{{
-nofb
}}}

=== Create / Specify display driver in /etc/X11/xorg.conf ===
This will force X to use the VESA display driver, which is slow for local display but works great for remote connection.

{{{
Section "Screen"
        Identifier "Default Screen"
        Device "Default Video Card"
        DefaultDepth 24
EndSection

Section "Device"
        Identifier "Default Video Card"
        Driver "vesa"
EndSection
}}}

Translation(s): English - español

(!) ?Discussion


VNC stands for Virtual Network Computing. It is, in essence, a remote display system which allows you to view a computing `desktop' environment not only on the machine where it is running, but from anywhere on the Internet and from a wide variety of machine architectures.

It is implemented in a client/server model. This package provides a client for XWindow, with this you can connect to a vncserver somewhere in the network and display its content in a window. There are vncserver available for X and for Win95/NT.

The difference between the xtightvncviewer and the normal vncviewer is the data encoding, optimized for low bandwidth connections. If the client does not support jpeg or zlib encoding it can use the default one. Later versions of xvncviewer (> 3.3.3r2) support a new automatic encoding that should be equally good as the tightvnc encoding.

FAQ

High CPU usage in X when VNC client is connected

Various causes between X versions and display driver may cause this issue. Below solutions attempt to fix:

Add parameters in x11vnc command line

If you are using x11vnc, you may try different parameters, one at a time, to see if it fix the issue

-noxfixes

-nobell

-nofb

Create / Specify display driver in /etc/X11/xorg.conf

This will force X to use the VESA display driver, which is slow for local display but works great for remote connection.

Section "Screen"
        Identifier      "Default Screen"
        Device          "Default Video Card"
        DefaultDepth    24
EndSection

Section "Device"
        Identifier      "Default Video Card"
        Driver          "vesa"
EndSection

Other VNC Tools

VNC 'Server side'

  • conspy - Remote control of Linux virtual consoles

  • gnome-rdp - remote desktop client for GNOME

  • krfb - Desktop Sharing for KDE

  • tightvncserver - virtual network computing server software

  • vino - VNC server for GNOME

  • vnc4server - Virtual network computing server software

  • x11vnc - VNC server to allow remote access to an existing X session

VNC 'Client side'

  • directvnc - VNC client using the framebuffer as display

  • gvncviewer - VNC viewer using gtk-vnc

  • krdc - Remote Desktop Connection for KDE

  • python-gtk-vnc - A VNC viewer widget for GTK+ (python binding)

  • ssvnc - Enhanced TightVNC viewer with SSL/SSH tunnel helper

  • tightvnc-java - TightVNC java applet and command line program

  • tkvnc - Displays a list of (defined) machines to start VNC to

  • tsclient - front-end for viewing of remote desktops in GNOME

  • vinagre - remote desktop client for the GNOME Desktop

  • vnc-java - VNC java applet and command line program

  • xrdp - Remote Desktop Protocol (RDP) server

  • xtightvncviewer - virtual network computing client software for X

  • xvnc4viewer - Virtual network computing client software for X

VNC Tools

  • pyvnc2swf - screen recording tool to SWF movie

  • vncsnapshot - A utility that takes JPEG snapshots from VNC servers

  • x2vnc - A dual-screen hack - link an MS-Windows and X display


NetworkApplication | RemoteDesktop