I just upgraded my RX Vega 64 drivers over an hour ago to 18.5.1 and it has become a total nightmare. The new drivers reduce my resolution from 3840x2160 down to 1024x768 and locks it in place. I can't do anything about it other than uninstall. When it is uninstalled it goes back to my native resolution but then I'm stuck with Windows drivers. I keep trying to install the previous driver on my computer, 18.2.1, but it decides to download 18.5.1 again and puts me in a Catch 22. It's really annoying now that I have no idea how to fix this and can't do anything gpu intensive at this point. My Vega 64 is no better than integrated graphics now. Please help!
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Thank you very much! I was ready to tear my hair out. This method even fixed a problem I had even before updating the drivers so it's a win win.