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Black screen (black square / black rectangle) when using Controller via Citrix (for example via Cloud) caused by using two displays/monitors with different scalability settings

Troubleshooting


Problem

User logs onto the Citrix website portal (Storefront). User clicks on the 'Controller' icon. The Controller Citrix published application launches.
 
User is presented with the Controller client logon screen. However, everything looks strange.

Example #1
Specifically, the published applications are completely black.

Example #2
Black squares/rectanglular 'artifacts' are left on the screen.

Symptom

Example #1:

image-20180709090354-2

Example #2

image-20190717170427-1

[{"Business Unit":{"code":"BU048","label":"IBM Software"},"Product":{"code":"SS9S6B","label":"IBM Cognos Controller"},"Component":"","Platform":[{"code":"PF033","label":"Windows"}],"Version":"All Versions","Edition":"","Line of Business":{"code":"LOB76","label":"Data Platform"}},{"Business Unit":{"code":"BU048","label":"IBM Software"},"Product":{"code":"SSMRTZ","label":"IBM Cognos Controller on Cloud"},"Component":"","Platform":[{"code":"PF033","label":"Windows"}],"Version":"All Versions","Edition":"","Line of Business":{"code":"LOB76","label":"Data Platform"}},{"Product":{"code":"SSMRTZ","label":"IBM Cognos Controller on Cloud"},"Business Unit":{"code":"BU048","label":"IBM Software"},"Component":" ","Platform":[{"code":"","label":""}],"Version":"","Edition":"","Line of Business":{"code":"LOB76","label":"Data Platform"}}]

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Document Information

Modified date:
09 May 2025

UID

ibm10716677