05-30-2002
adding a second display, keyboard
Customer is wanting to add a second display and keyboard to a unix system.
Sernario:
Medical office has unix system with five dumb terminals, and a VGA/SVGA monitor, PS/2 keyboard. They want to remove one of the dumb terminals and replace with a second VGA/SVGA monitor and keyboard. Can this be done? Will they be able to input from both keyboards at the same time? What kind of hardware would be involved in this process. Is this the right area to ask this question? Thank you for your help.
Last edited by slideright; 06-02-2002 at 05:56 PM..
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LEARN ABOUT OSF1
xchangekeyboarddevice
XChangeKeyboardDevice(3X11) XChangeKeyboardDevice(3X11)
NAME
XChangeKeyboardDevice - change which device is used as the X keyboard
SYNOPSIS
Status XChangeKeyboardDevice(display, device)
Display *display;
XDevice *device;
ARGUMENTS
Specifies the connection to the X server. Specifies the device to be used as the X keyboard.
DESCRIPTION
The XChangeKeyboardDevice request causes the server to use the specified device as the X keyboard. The device must have been previously
opened by the requesting client via XOpenDevice or a BadDevice error will result. The device must support input class Keys, or a BadMatch
error will result. If the server implementation does not support using the requested device as the X keyboard, a BadDevice error will
result.
If the specified device is grabbed by another client, AlreadyGrabbed is returned. If the specified device is frozen by a grab on another
device, GrabFrozen is returned. If the request is successful, Success is returned.
If the request succeeds, a ChangeDeviceNotify event is sent to all clients that have selected that event. A MappingNotify event with
request = MappingKeyboard is sent to all clients. The specified device becomes the X keyboard and the old X keyboard becomes accessible
through the input extension protocol requests.
XChangeKeyboardDevice can generate a BadDevice or a BadMatch error.
DIAGNOSTICS
An invalid device was specified. The specified device does not exist, has not been opened by this client via XOpenInputDevice, or is
already one of the core X device (pointer or keyboard). This error may also occur if the server implementation does not support using the
specified device as the X keyboard. This error may occur if an XChangeKeyboardDevice request was made specifying a device that has no
keys.
SEE ALSO
XChangePointerDevice(3X11)
Programming With Xlib
XChangeKeyboardDevice(3X11)