How to query number of attached monitors in csh? Post: 302358307

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Top Forums Shell Programming and Scripting How to query number of attached monitors in csh? Post 302358307 by mpcengineering on Friday 2nd of October 2009 10:21:31 AM

10-02-2009

Registered User

How to query number of attached monitors in csh?

Hi there,

I am currently writing a csh script in which I want to be able to interrogate the hardware by some means in order to determine whether or not dual monitors are connected. This can't unfortunately be done by looking at xorg.conf because although some of the machines in question have extended desktops over both monitors (in which case the xorg.conf does differ), some do not and just have twinview mirrored desktop enabled (in which case xorg.conf is identical to a single monitor machine).

Basically one thing needs to happen if a CRT is attached as well as an LCD (the dual monitor setup always includes a CRT) and another thing needs to happen if just an LCD is attached, so the solution could also be based around finding if a CRT is attached or not rather than just if 2 monitors are present.

Can anyone suggest any solution to this problem?

Thanks!

Jon

---------- Post updated at 09:21 AM ---------- Previous update was at 04:07 AM ----------

Bah, one of those that never gets replied I fear.....

mpcengineering

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LEARN ABOUT PLAN9

v4l

V4L(4)							     Kernel Interfaces Manual							    V4L(4)

NAME

       v4l - video4linux driver

SYNOPSIS

       Section "Module"
	 ...
	 Load "v4l"
       EndSection

DESCRIPTION

       v4l  is	an  Xorg  driver for video4linux cards.  It provides a Xvideo extension port for video overlay.  Just add the driver to the module
       list within the module section of your xorg.conf file if you want to use it.  There are no config options.

       Note that the extmod module is also required for the Xvideo support (and lots of other extensions too).

SUPPORTED HARDWARE

       The v4l driver works with every piece of hardware which is supported by a video4linux (kernel-) device driver and is able to  handle  video
       overlay.

       bt848/bt878-based TV cards are the most popular hardware these days.

CONFIGURATION DETAILS

       Please refer to xorg.conf(5) for general configuration details.	This section only covers configuration details specific to this driver.

SEE ALSO

       Xorg(1), xorg.conf(5), xorgconfig(1), Xserver(1), X(7)

AUTHORS

       Authors include: Gerd Knorr <kraxel@bytesex.org>

X Version 11						       xf86-video-v4l 0.2.0							    V4L(4)