Workaround for CFD Orientation and Scaling Issues in Duplicate Mode on EloPOS Z30 (Windows)

Audience: Public / Elo Customers, IT Administrators & Integrators

Article Type: Troubleshooting & Display Configuration Guide

This article addresses a known Windows display topology behavior on EloPOS Z30 Windows systems equipped with an attached Customer Facing Display (CFD) where switching the multi-display topology from Extended to Duplicate (Clone) mode causes incorrect rotation, aspect ratio distortion, or black letterboxing on the secondary screen.

Observed Symptoms

• The CFD rotates unexpectedly into portrait orientation upon enabling Duplicate mode.
• The secondary image appears stretched, misaligned, or improperly scaled.
• Black border bars appear around the perimeter of the CFD.
• Windows Display Settings reports resolution as 1200 × 1920 instead of native 1920 × 1200.

Affected Systems

• EloPOS Z30 Intel systems running Windows 10 or Windows 11.
• Configurations with integrated or connected Customer Facing Displays (CFD).
• (Note: Systems operating in Extended Desktop mode function normally and are not impacted.)

Resolution & Orientation Toggle Workaround

This display driver handshaking issue can be resolved by temporarily toggling the Windows display orientation state:

1. Right-click on the Windows desktop and select Display settings.

2. Under the Multiple Displays section, set the mode to Duplicate these displays.

   

3. Change the Display orientation dropdown setting to Portrait.

   

4. Immediately change the Display orientation setting back to Landscape and confirm "Keep changes".

   

5. The Windows graphics pipeline will reset the display timing parameters, and the CFD will render correctly in full 1920 × 1200 landscape duplicate mode.

   

Need Additional Support?

If the orientation toggle procedure does not restore the CFD display, contact Elo Technical Support with your system serial number, Windows OS build revision, and CFD hardware configuration.