[ltp] using vncserver for presentations on T40

[obi]

Disclaimer: I have my X setutp as a dual head and I do use xinerama so I
didn't try the trick but ...

I setup a vncserver (as you did), fired up a single instance of
xvncviewer and in the xterm inside the vnc I set xhost +. Then any
external command with -display :3 would show up in the right place.

cheers,
graziano

On Tue, Feb 01, 2005 at 04:51:53PM -0500, Brad Langhorst wrote:
> I've recently started trying to build a configuration for presentations
> based on Klaus Wiedner's config.  Since I have to give a bunch of
> lectures this semester I want to make my life easy.
> 
> Here's a the shell script that I want to use to start a presentation: 
> 
> ==================================================================
> #!/bin/sh
> res="$2"
> #set resolution to 1024x768 by default
> if [ -z "$res" ] ; then res="1024x768" ; fi
> echo "switching to $res"
> 
> xrandr -d :0.1 -s $res
> 
> #create a new instance of X for vnc
> vnc4server :3 -name 'presentation' -localhost -geometry $res
> 
> #put a full screen version on the external display
> xvnc4viewer -display :0.1 -Shared -FullScreen -UseLocalCursor :3 -passwd
> ~/.vnc/passwd &
> 
> #put window of the presentation on the main display
> xvnc4viewer -Shared -UseLocalCursor :3 -passwd ~/.vnc/passwd &
> 
> #i want to run this command in the xvnc server not on display 0.1...
> #ooimpress -display :0.1 -show $1
> ===================================================================
> 
> It took me a while to understand that vncserver starts up its own
> instance of X and that I need to open windows on that instance.  Right
> now I only know how to start stuff in there using .vnc/xstartup
> I tried x11vnc to skip vncserver altogether but it sucks... you have to
> move the mouse very hard to get it out of the vnc window and the refresh
> rate is very slow. If I could get the mouse to easily release then I
> might use it anyway since i don't really care that much about the
> quality of display on my laptop.
> 
> Here are my problems with this setup:
> 
> 1) the keyboard focus never comes back to my main screen until I kill
> the vncserver.  The mouse does switch focus correctly - this is a major
> problem for me.
> 
> 2) I want to be able to run commands to display in the vnc x server but
> can't find any way to do that
> 
> 3) The external display gets an instance of my normal window manager
> (gnome's metacity)... I don't want that to happen but I can't seem to
> avoid it. Essentially, Iwant the window manager to be vncviewer :3.
> 
> 4) When I run "xrandr -d :0.1" display :0.0 gets corrupted.... I have to
> drag some windows around to force a redraw (probably a driver issue)
> 
> 5) If I don't start X with the external display connected xdpyinfo shows
> only one display.  It'd be really nice to just walk into the
> presentation room, unsuspend, and run presentation.sh foobar.sxi. Right
> now i have to log out and restart X before i can present.  This is not a
> huge problem since I rarely restart X and i can just take care to always
> start with an external display connected.
> 
> Does anybody else who uses this type of config have solutions for these
> problems ?
> 
> thanks!
> 
> brad
> 
> 
> 
> 
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