Abstract: A method and system of testing pixels output from a pixel generation unit under test includes generating pixels from the pixel generation unit under test using a first test data pattern to generate pixel information. The method and system also generate a per pixel error value for a pixel from the unit under test that contains an error based on the pixel by pixel comparison with pixel information generated substantially concurrently with pixels by a different unit using the first test data pattern. If desired, corresponding pixel screen location information (e.g., x-y location) can also be determined for the pixel that has the error. The per pixel error and x-y location information can be displayed.

Abstract: A method and system of testing pixels output from a pixel generation unit under test includes generating pixels from the pixel generation unit under test using a first test data pattern to generate pixel information. The method and system also generate a per pixel error value for a pixel from the unit under test that contains an error based on the pixel by pixel comparison with pixel information generated substantially concurrently with pixels by a different unit using the first test data pattern. If desired, corresponding pixel screen location information (e.g., x-y location) can also be determined for the pixel that has the error. The per pixel error and x-y location information can be displayed.

Abstract: In a specific embodiment of the present invention, a graphics device generates digital output data in response to a known input data. The resulting digital output data has an expected circular redundancy check (CRC) value. The generated digital output data is provided to a digital graphics output port associated with the graphics controller, which is thereby transmitted to a test apparatus over a digital graphics cable. The test apparatus performs an analysis on the received digital graphics data. The analysis results are transmitted back to the graphics device over a serial link of the digital display cable. The graphics device receives the transmitted analysis data, which is subsequently used to determine if the graphics device is operating properly. This determination may be made the graphics device, or by a host system for further analysis.