I have tried two graphics cards, HD7450 and HD6450, and three systems, Windows 7, Windows 8, and Windows XP.
At the beginning, the HDMI interface can be used normally, but when the driver is installed and restarted, the screen will go black. The HDMI interface cannot be used, and the VAG interface is used normally, but there are serious drag shadows
Now I have lenovo's hd6450 in my hand
Customer service asked me to install the lenovo website driver, but it didn't work
