You can pass AsyncPointer , SyncPointer , AsyncKeyboard , SyncKeyboard , ReplayPointer , ReplayKeyboard , AsyncBoth , or SyncBoth . You can pass either a timestamp or CurrentTime . The XAllowEvents function releases some queued events if the client has caused a device to freeze. It has no effect if the specified time is earlier than the last-grab time of the most recent active grab for the client or if the specified time is later than the current X server time. XAllowEvents can generate a BadValue error.
Some numeric value falls outside the range of values accepted by the request.
Unless a specific 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.