This happened both under the open source driver and the Catalyst driver. I *think* it happens when the cursor switches from one monitor to the other but not every time. Maybe 1x every 2 weeks? It has happened 4 times at least.

Logging out does not fix it. Changing the cursor and its theme does not fix it.

Here's what it looks like:

Here's someone experiencing the same thing on Ubuntu:


Linux 3.16.7-21-desktop
openSUSE 13.2 (Harlequin) (x86_64)
KDE 4.14.9

AMD A4-3400 APU with Radeon(tm) HD Graphics

The computer is the Acer AX1470-UR30P (Desktop)