Error 0x087A0009

Value: 142213129 | 0x087A0009 | 142213129

What does it mean ?

DXGI_STATUS_UNOCCLUDED  
The swapchain has become unoccluded.
Value: 9 | 0x0009 | 0b0000000000001001

Where does it come from ?

FACILITY_DXGI  
DirectX Graphics Infrastructure
Value: 2170 | 0x87A | 0b100001111010

Other Errors for FACILITY_DXGI