[mythtv-users] OT - Connect to existing session (VNC)

Joseph A. Caputo jcaputo1 at comcast.net
Fri Mar 17 00:36:42 UTC 2006

A JM wrote:

> On 3/16/06, *Joseph A. Caputo* <jcaputo1 at comcast.net 
> <mailto:jcaputo1 at comcast.net> > wrote:
>     On Wednesday 15 March 2006 15:31, Joacim J wrote:
>     > Hi,
>     >
>     > I have the mythtv user logged in at the physical MythTV box and
>     then
>     > I want, from a remote location (WinXP), connect a VNC (RealVNC)
>     > client to the same session. Is this possible and if so how?
>     >
>     > Using FC4.
>     Recent versions of both XFree86 and X.org <http://X.org> have a
>     built-in Xvnc module
>     that 'exports' the live X display.  There have been some recent
>     threads
>     on how to do this.  Try searching the list archives for "vnc x.org
>     <http://x.org>".
>     The first thread has useful information.
>     Note that you won't be able to watch video in the VNC session --
>     you'll
>     just see a blank (probably blue) screen.  This is because video output
>     uses hardware features (like Xv or XvMC) that can't be emulated by
>     the
>     Xvnc server.  So, the remote VNC session is only good for navigating
>     the Myth menus & other screens, but not watching video -- with one
>     exception:  you could run the frontend with "env NO_XV=1
>     mythfrontend",
>     which will cause Myth to use the standard X11 SHM mechanism for
>     display.  This might allow you to watch video over VNC (better have a
>     fast network connection), but your frontend CPU usage will
>     dramatically
>     increase while watching video, because all decoding & scaling has
>     to be
>     done in software instead of relying on the video card.
>     -JAC
> Does that allow you to connect to an existing session?

Yes; as long as your xorg.conf or XF86Config is properly set up for VNC, 
then any display you've configured it for will always be available 
'live' over VNC.


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