Just got this laptop on Monday and have had to reset it twice once due to the rx560x disappearing and then the screen complete freezing unless I put the lid down and back up after trying to download aura, currently using the driver from Asus website but when I've done benchmarks on ff14 it shows up as Vega 8 but in the task manager on the performance tab it say the rx560x is been used, is that right?
Finally fixed this issue on my fx505dy. First, update your bios to version 309 then download both the latest CHIPSET drivers on the asus (version V25.20.14128.4002) and amd (version 19.10) page. Then download the latest rx 560x drivers on the amd page (version 19.6.1). Then I used DDU in safe mode to uninstall the amd drivers currently in my system. After reboot, I started installing the drivers I downloaded in this order: amd chipset from asus => amd chipset from amd => rx 560x driver from amd. Then I tweak it a bit with msi afterburner so that the global settings in the radeon setting would have global wattman tab present (additional tweaks gets me 15% more performance from the rx 560x, saw it from a you tube post). Haven't gotten any issues since I did all this, but I do hope both asus and amd makes a more stable driver in the near future. Hope this helps and goodluck! *results may vary*
I'm also facing with same issue. Today, I can fix it. Before, I install driver chipset from Asus for my FX505DY (Version V25.20.14128.4002). And then I check the information of AMD graphics card driver version. Important, you can see Known Issue of the version. With version 19.5.1, we have "ASUS TUF Gaming FX505 may experience discrete GPU connection issues with devices disappearing from device manager when the system is idle". Then, I check version 19.4.3, and this version don't have that issue. So I installed 19.4.3 and it really worked. Hope this answer can help anybody get this issue.