4K monitor attached to Windows 8.1 system may not display Duplicate mode

S’applique à : Windows 8.1

Symptoms


When attempting to switch displays to Duplicate mode on a Windows 8.1 system using the Projection (Win+P) option on a system that has a 4K monitor connected through DisplayPort (DP), the display may not switch to Duplicate mode.

Cause


Windows 8.1 may not yet fully support certain 4K (3840x2160) monitors with DP 1.2 enabled.  When set to DP 1.2 mode, this type of 4K monitor presents itself to the graphics adapter as two separate 1920 x 2160 displays at 60 Hz rather than a single display.

Resolution


If your system has an Intel graphics adapter, use the Intel HD Graphics app to configure for Duplicate (Clone) mode. If you have a different graphics adapter, contact the manufacturer for support.