Using Web Browser to Remote Desktop Login to pcDuino

Posted by: admin , May 23, 2014

In this post, we discuss how to remote access pcDuino’s desktop using a web browser.

To achieve that, a x11vnc server needs to be installed on pcDuino. As x11vnc is built with the factory provided image, we just need to configure it.

Step 1 Configure the password to remote access

$x11vnc -storepasswd

Step 2 Start VNC Server

$x11vnc -display :0 -xkb -rfbauth .vnc/passwd -auth .Xauthority -shared -http

Now it will dump out the following information:

23/05/2014 02:20:08 passing arg to libvncserver: -rfbauth
23/05/2014 02:20:08 passing arg to libvncserver: .vnc/passwd
23/05/2014 02:20:08 x11vnc version: 0.9.12 lastmod: 2010-09-09 pid: 1163
23/05/2014 02:20:08 Using X display :0
23/05/2014 02:20:08 rootwin: 0×101 reswin: 0x2a00001 dpy: 0x13ecfb0
23/05/2014 02:20:08
23/05/2014 02:20:08 —————— USEFUL INFORMATION ——————
23/05/2014 02:20:08 X DAMAGE available on display, using it for polling hints.
23/05/2014 02:20:08 To disable this behavior use: ‘-noxdamage’
23/05/2014 02:20:08
23/05/2014 02:20:08 Most compositing window managers like ‘compiz’ or ‘beryl’
23/05/2014 02:20:08 cause X DAMAGE to fail, and so you may not see any screen
23/05/2014 02:20:08 updates via VNC. Either disable ‘compiz’ (recommended) or
23/05/2014 02:20:08 supply the x11vnc ‘-noxdamage’ command line option.
23/05/2014 02:20:08
23/05/2014 02:20:08 Wireframing: -wireframe mode is in effect for window moves.
23/05/2014 02:20:08 If this yields undesired behavior (poor response, painting
23/05/2014 02:20:08 errors, etc) it may be disabled:
23/05/2014 02:20:08 – use ‘-nowf’ to disable wireframing completely.
23/05/2014 02:20:08 – use ‘-nowcr’ to disable the Copy Rectangle after the
23/05/2014 02:20:08 moved window is released in the new position.
23/05/2014 02:20:08 Also see the -help entry for tuning parameters.
23/05/2014 02:20:08 You can press 3 Alt_L’s (Left “Alt” key) in a row to
23/05/2014 02:20:08 repaint the screen, also see the -fixscreen option for
23/05/2014 02:20:08 periodic repaints.
23/05/2014 02:20:08
23/05/2014 02:20:08 XFIXES available on display, resetting cursor mode
23/05/2014 02:20:08 to: ‘-cursor most’.
23/05/2014 02:20:08 to disable this behavior use: ‘-cursor arrow’
23/05/2014 02:20:08 or ‘-noxfixes’.
23/05/2014 02:20:08 using XFIXES for cursor drawing.
23/05/2014 02:20:08 GrabServer control via XTEST.
23/05/2014 02:20:08
23/05/2014 02:20:08 Scroll Detection: -scrollcopyrect mode is in effect to
23/05/2014 02:20:08 use RECORD extension to try to detect scrolling windows
23/05/2014 02:20:08 (induced by either user keystroke or mouse input).
23/05/2014 02:20:08 If this yields undesired behavior (poor response, painting
23/05/2014 02:20:08 errors, etc) it may be disabled via: ‘-noscr’
23/05/2014 02:20:08 Also see the -help entry for tuning parameters.
23/05/2014 02:20:08 You can press 3 Alt_L’s (Left “Alt” key) in a row to
23/05/2014 02:20:08 repaint the screen, also see the -fixscreen option for
23/05/2014 02:20:08 periodic repaints.
23/05/2014 02:20:08 X FBPM extension not supported.
23/05/2014 02:20:08 X display is capable of DPMS.
23/05/2014 02:20:08 ——————————————————–
23/05/2014 02:20:08
23/05/2014 02:20:08 Default visual ID: 0×21
23/05/2014 02:20:08 Read initial data from X display into framebuffer.
23/05/2014 02:20:08 initialize_screen: fb_depth/fb_bpp/fb_Bpl 24/32/5120
23/05/2014 02:20:08
23/05/2014 02:20:08 X display :0 is 32bpp depth=24 true color
23/05/2014 02:20:08
23/05/2014 02:20:08 Autoprobing TCP port
23/05/2014 02:20:08 Autoprobing selected port 5901
23/05/2014 02:20:08 Listening also on IPv6 port 5901 (socket 10)
23/05/2014 02:20:08 check_httpdir: trying to guess httpdir… x11vnc
23/05/2014 02:20:08 check_httpdir: guessed directory:
23/05/2014 02:20:08 /usr/bin/../share/x11vnc/classes
23/05/2014 02:20:08 http_connections: turning on http service.
23/05/2014 02:20:08 Listening for HTTP connections on TCP port 5801
23/05/2014 02:20:08 URL http://ubuntu:5801
23/05/2014 02:20:08 http_connections: Listening also on IPv6 port 5801 (socket 12)
23/05/2014 02:20:08
23/05/2014 02:20:08 Xinerama is present and active (e.g. multi-head).
23/05/2014 02:20:08 Xinerama: number of sub-screens: 1
23/05/2014 02:20:08 Xinerama: no blackouts needed (only one sub-screen)
23/05/2014 02:20:08
23/05/2014 02:20:08 fb read rate: 19 MB/sec
23/05/2014 02:20:08 The X server says there are 10 mouse buttons.
23/05/2014 02:20:08 screen setup finished.
23/05/2014 02:20:08
23/05/2014 02:20:08 The URLs printed out below (‘Java … viewer URL’) can
23/05/2014 02:20:08 be used for Java enabled Web browser connections.
23/05/2014 02:20:08

The VNC desktop is: ubuntu:1
Java viewer URL: http://ubuntu:5801/
PORT=5901