Thanks for your advice. I tried with WEG and shikikva in device property and without WEG with my RX6900XT, but the TV app just shows green for video so DRM is not working. I did reset the TV app (logout/login) too but it did not help. I am on Monterey 12.1 now.@ryyzz You're better setting shigikva as a device property instead of the boot arg. With my RX 480 the boot arg didn't work but device property did. With my 6800 I don't use WEG and the TV app works fine.