I am having the same issue. If there is a fix besides updating to a new video card please post it here. Below is my video card specs and a screen shot.
Card name: AMD Radeon HD 6900 Series
Manufacturer: Advanced Micro Devices, Inc.
Chip type: AMD Radeon Graphics Processor (0x6719)
DAC type: Internal DAC(400MHz)
Device Type: Full Device (POST)
Device Key: Enum\PCI\VEN_1002&DEV_6719&SUBSYS_23071787&REV_00
Device Status: 0180200A [DN_DRIVER_LOADED|DN_STARTED|DN_DISABLEABLE|DN_NT_ENUMERATOR|DN_NT_DRIVER]
Device Problem Code: No Problem
Driver Problem Code: Unknown
Display Memory: 5872 MB
Dedicated Memory: 2032 MB
Shared Memory: 3840 MB
Current Mode: 1920 x 1080 (32 bit) (60Hz)
HDR Support: Not Supported
Display Topology: Extend
Display Color Space: DXGI_COLOR_SPACE_RGB_FULL_G22_NONE_P709
Color Primaries: Red(0.641602,0.334961), Green(0.291016,0.635742), Blue(0.153320,0.042969), White Point(0.313477,0.329102)
Display Luminance: Min Luminance = 0.500000, Max Luminance = 270.000000, MaxFullFrameLuminance = 270.000000
Monitor Name: Generic PnP Monitor
Monitor Model: 2752
Monitor Id: AOC2752
Native Mode: 1920 x 1080(p) (60.000Hz)
Output Type: HDMI