I have a Radeon R9 380 Graphics card and the cursor changes from Arrow to a vertical dotted line. I have read instances of this since 2008, but although the outcome is the same, I am not sure if the cause is.
I posted before, but should have completed the requested info below, and have done so this time.
I believe AMDMatt has suggested the problem would be fixed with a driver update in Feb 2017, but I have just updated to 18.1 and 18.2 and the problem is still occurring. What can I do so the cursor doesn't corrupt, without turning on cursor trails? Wiggling the mouse quickly does not fix the problem.
If AMD aren't sure when the fix is, does anyone know what the core problem is?
The problem is depicted here in the original request and answer in Feb 2017
Describe your system:
Gigabyte R9 380 2Gb
Windows 10 64bit
Gigabyte AX370 Gaming 5, Bios F10
AMD Ryzen 1700
This seems to be an old driver issue as you noted. A couple of people in Reddit mentioned to use Windows Magnifier Glass at 100% which they say fixes the problem as a workaround. here is the thread: https://www.reddit.com/r/Amd/comments/536eyx/just_installed_my_xfx_480_gtr_my_cursor_is_a/
Copied this from above link:
jininjuice4690K | RX 480 GAMING X 8G 1 point 1 year ago