When I build this new desktop I Install the chipset drivers and the Firestorm Viewer works normally but whey I updated the graphics card drivers to the lastet one (I downloaded them from the AMD website and also made a clean installation) , I open the Firestorm Viewer and I just can see the viewer's window with dashed horizontal lines. Any other Software installed works fine even the games. I just face this problem with the second life viewers (Even the official Second Life Viewer makes the same, dashed horizontal lines).
I've an ryzen 5 2400g with 8 gb ram 2400mhz (4x2) and I'm using the AMD RX Vega 11 graphics with 2 gb dedicated.
My motherboard was an Gigabyte B450M DS3H (rev.1.0) with updated Bios ver F4.