Black Screen Flashes in double hop seamless session of published applications

Set below registry to 0 in both client and 1st hop VDA:


[32bit OS] HKLMSOFTWARECitrixICA ClientEngineConfigurationAdvancedModulesGfxRenderPresentDevice

[64bit OS] HKLMSOFTWAREWow6432NodeCitrixICA ClientEngineConfigurationAdvancedModulesGfxRenderPresentDevice


This registry is of DWORD type; create it if it’s absent.

By setting it to 0, GDI rendering device is used.

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