For the last couple of months my display doesn't clear to the background when a window is closed or minimized. It shows the trail of the window. This was after a update. It also seems to work normally every fourth or fifth update. What is causing this?
sudo lshw | grep -A9 VGA:
description: VGA compatible controller product: RS880 [Radeon HD 4200] vendor: Advanced Micro Devices, Inc. [AMD/ATI] physical id: 5 bus info: pci@0000:01:05.0 version: 00 width: 32 bits clock: 33MHz capabilities: pm msi vga_controller bus_master cap_list rom configuration: driver=radeon latency=0