It is merely stored for reading and writing by clients. If the specified device does not support input class keys, a BadMatch error results. An invalid device was specified. The speci fied device does not exist or has not been opened by this client via XOpenInputDevice. This error may also occur if the specified device is the X keyboard or X pointer device.
Some numeric value falls outside the range of values accepted by the request.
Unless a spe cific range is specified for an argument, the full range defined by the argument's type is accepted. Any argument defined as a set of alternatives can generate this error. The server failed to allocate the requested resource or server memory.