Disgraceful there is no 1803 driver for raven ridge.
Please search the forums before opening another thread. This question is already addressed numerous times and no there are not currently any new drivers. Yes I would assume that eventually there will be but have not seen any ETA as to when that will be. These forums are your peers, they are community forums, not AMD employees. If you need to let AMD know about the issue, do that here: Email Form
You can install the new driver available here : Radeon Software Adrenalin Edition Q2 2018 Release Notes
Note : It is essential that you reboot the system after you install these drivers.
Please submit your feedback on any issues with this driver here.