[ltp] Using T41p for Presentation over Projector

[John A Chaves]

I don't know how it works in dual monitor mode, but the xrandr command
can be used to switch resolution.  With tpb, this lets you use the
standard Thinkpad <Fn><Space> key combo to zoom in the display.

For example, the following code in your tpb callback script will cycle
through all of the configured screen resolutions.

  zoom)
      XRANDR=/usr/X11R6/bin/xrandr
      query="$XRANDR -q"
      current=`$query | sed -n 's/^\*\([0-9][0-9]*\).*/\1/p'`
      next=`expr $current + 1`
      ($query | grep -q "^.$next ") || next=0
      #echo $current $next
      $XRANDR -s $next
      ;;



On Wednesday 27 October 2004 08:03 am, Nick Bower wrote:
> I have your experience.
>
> To run separate resolutions for the case when using with laptop or when
> using external monitor, I need to start X up separately with the monitor
> connected or disconnected.  This determines the startup resolution - if
> monitor is attached at start, the LCD is smaller and acts as a scrolling
> viewport.  If it is not attached at start, then the monitor inherits the
> lower resolution of the LCD.  And if this external device is a fixed
> resolution device (eg LCD, projector) this has unpredictable
> consequences because you're not driving it correctly.
>
> Ideally you'd have X zooming hotkeys without starting X each time, but
> this doesn't seem to work for me (Mandrake 10 / X 4.3).
>
> On Wed, 2004-10-27 at 13:38, Chan-Wah Ng wrote:
> > Greetings,
> >
> > I have this problem about using T41p for presentation.  I am able to
> > configure X to do either (a) clone mode, or (2) independent screen.
> > However, it will work only if X started after the projector plug is
> > connected to the VGA out.  If I start X with nothing connected, the
> > results varies ... depending on the projector.  For the one I am
> > currently using, it gives a non-scrollable clone of my desktop at a
> > resolution of 1280x1024 (I think).
> >
> > Anyway I can configure the X to always pretend that an external
> > connector of 1024x768 is available?  Thank you!
> >
> > Some system info:
> > Hardware: T41p, 1400x1050 LCD, AIT Radeon M9,
> > Software: Gentoo Linux, Kernel 2.6.9-gentoo-r1, X.org 6.8.0
> >
> > Attached is the xorg.conf.
> >
> > /rgds
> > /cwng