In your TV settings, if there is nothing called limited/full range RGB then often it will just be called the "Black Level".
Quote from bug 1668159: if your device doesn't yet support changing the setting, and your HDMI- connected TV looks a bit wrong then you can probably just change the TV settings: Picture is too dark/black: Likely problem is that your device is outputting full range and your TV is expecting limited. Change your TV settings to Black level = Normal or High Picture is washed out (blacks appear grey and whites are dim): Likely problem is that your device is outputting limited range and your TV is configured for full range. Change your TV settings to Black level = Low (which means to treat 16 as full black and 235 as full white). -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1785764 Title: Some applications render too dark when a 4K screen is attached. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/1785764/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
