Abstract: In accordance with embodiments of the present disclosure, an information handling system is provided. The information handling system may include a processor; a display coupled to the processor, the display comprising a pixel clock source configured to generate a pixel clock frequency; a memory device coupled to the processor, the memory device having a lookup table stored thereon; and a controller coupled to the processor and configured for: receiving frequency information associated with wireless transmissions of the information handling system; and dynamically adjusting the pixel clock frequency by selecting a frequency from the lookup table in response to a determination that the received frequency information is approximately equal to the pixel clock frequency.

Abstract: In accordance with embodiments of the present disclosure, an information handling system is provided. The information handling system may include a processor; a display coupled to the processor, the display comprising a pixel clock source configured to generate a pixel clock frequency; a memory device coupled to the processor, the memory device having a lookup table stored thereon; and a controller coupled to the processor and configured for: receiving frequency information associated with wireless transmissions of the information handling system; and dynamically adjusting the pixel clock frequency by selecting a frequency from the lookup table in response to a determination that the received frequency information is approximately equal to the pixel clock frequency.

Abstract: In accordance with embodiments of the present disclosure, an information handling system is provided. The information handling system may include a processor; a display coupled to the processor, the display comprising a pixel clock source configured to generate a pixel clock frequency; a memory device coupled to the processor, the memory device having a lookup table stored thereon; and a controller coupled to the processor and configured for: receiving frequency information associated with wireless transmissions of the information handling system; and dynamically adjusting the pixel clock frequency by selecting a frequency from the lookup table in response to a determination that the received frequency information is approximately equal to the pixel clock frequency.

Abstract: In accordance with embodiments of the present disclosure, an information handling system is provided. The information handling system may include a processor; a display coupled to the processor, the display comprising a pixel clock source configured to generate a pixel clock frequency; a memory device coupled to the processor, the memory device having a lookup table stored thereon; and a controller coupled to the processor and configured for: receiving frequency information associated with wireless transmissions of the information handling system; and dynamically adjusting the pixel clock frequency by selecting a frequency from the lookup table in response to a determination that the received frequency information is approximately equal to the pixel clock frequency.

Abstract: An improved system and method for selectively applying LCD Response Time Compensation (LRTC) to areas of an LCD panel containing video motion. Motion vectors contained within macroblocks in a compressed video stream are utilized to qualify whether individual pixels in a video frame are a candidate for LRTC. In various embodiments of the invention, computationally expensive LRTC can be selectively applied, pixel-by-pixel, which can result in portable information system power savings by reducing the number of computational cycles and the amount of graphics controller power overhead.

Abstract: The present invention provides a method and apparatus for automatically detecting whether an external monitor is connected to a video port of an information handling system. In various embodiments of the invention, detection of the display is accomplished by periodic polling to detect the presence of an Extended Display Identification Data (EDID) signal as an indication of whether a display has been plugged in or removed. In embodiments of the invention, hardware polling is implemented to provide the interrupt-driven mechanism, thereby relieving software of the performance degradation associated with polling the video port at very short time intervals.

Abstract: The present invention provides a method and apparatus for automatically determining whether display is attached to a display interface port. In an embodiment of the invention a display can be automatically detected by determining whether an EDID is present and, therefore, whether a display is present at the video interface port. Detection logic is operable to generate a DDC polling signal for use by the EDID circuitry in a display and to receive a DDC data signal generated by the EDID circuitry in response to the polling signal. The DDC data signal generated by the EDID circuitry in the display comprises a header portion and a data portion. The detection logic is operable to examine the header portion of the DDC data signal to determine whether a display is connected to the display interface port.

Abstract: Visual information is selectively input or output from an information handling system video connector to support presentation of external visual information input to the connector at a display of the information handling system or presentation of internal visual information output from the connector at an external display. A multiplexer selectively interfaces the connector with a graphics controller to output analog visual information or with a video decoder to receive analog visual information for conversion to a digital format and communication to the graphics controller. In one embodiment, input of an external signal to the connector automatically configures the information handling system to receive and display the external visual information.

Abstract: LCD panel response time parameters are stored in local memory of the LCD panel, such as EDID ROM, for retrieval by an information handling system to use in adjusting visual information for presentation on the LCD panel. For instance, a response time compensation engine running on firmware in the graphics controller or in the operating system display driver applies the response time parameters to adjust visual information for improved image quality at the LCD panel. The response time parameters are, for instance, an average of response time of liquid crystal material applied to a non-linear approximation.

Abstract: PCI Express bus utilization is monitored for one or more predetermined thresholds to adjust the width of the bus in accordance with the utilization to provide power savings with minimal impact on performance. For instance, a performance monitor of a graphics controller tracks bus utilization with registers to adjust bus width between one, eight and sixteen lanes. Reduced numbers of active lanes are used at low utilization, such as one lane when a desktop graphic is presented on the display, increased numbers of active lanes are used at moderate utilization, such as eight lanes when a video image is presented on the display, and all lanes are active at high utilization, such as for presentation of three dimensional images.

Abstract: DVI native and docking station support for a portable information handling system provides output of display information from a either DVI connector at the portable information handling system housing or from a DVI connector at the portable information handling system docking station. A DVO signal outputs from a graphics component to a multiplexer that selectively provides the DVO signal to a TMDS transmitter associated with a housing DVI connector or to a TMDS transmitter associated with a docking station to information handling system connector and docking station DVI connector. Selection of the housing TMDS transmitter to receive the DVO signal is made if the information handling system is not coupled to the docking station, and selection of the docking station TMDS transmitter to receive the DVO signal is made if the information handling system is coupled to the docking station at the docking station connector.

Abstract: A method and apparatus of connecting an active computing device (15) to an active peripheral option (20) comprising the steps of making a physical connection (210) between the device (15) and the option (20) wherein the option (20) is communicably linked (44) to one or more peripheral devices (35, 40). A system interrupt signal is generated (240) and detected (250) by the system processor (17) causing all activity along the connection path between the device (15) and the option (20) to be suspended (250).

Abstract: A method and apparatus of connecting an active computing device (15) to an active peripheral option (20) comprising the steps of making a physical connection (210) between the device (15) and the option (20) wherein the option (20) is communicably linked (44) to one or more peripheral devices (35, 40). A system interrupt signal is generated (240) and detected (250) by the system processor (17) causing all activity along the connection path between the device (15) and the option (20) to be suspended (250).

Abstract: A method and apparatus for allowing hot docking of a portable computer (15) into a docking station (20) comprising the steps of making a physical connection (210) between the computer (15) and the docking station (20) wherein the docking station (20) is communicably linked (44) to one or more peripheral devices (35, 40). A system interrupt signal is generated (240) and detected (250) by the system processor (17) causing all activity along the connection path between the computer (15) and the docking station (20) to be suspended (250).