The screen glare of dp switching hdmi is caused by color gamut loss. DVI to HDMI will cause this problem, which is too dazzling, because part of the color gamut is automatically lost during HDMI transmission, resulting in the loss of gray scale. The image of standing on the gray wall in a black suit will show a piece of black. The solution is unless the TV itself has a grayscale adjustment function, such as Sony TV, or directly use a graphics card with HDMI interface.