Legacy graphics is a host (computer) policy and its use should be treated as an always on or always off. Behavior will differ between Workstation OS VDA and Server OS VDA. You should only ever be using legacy mode for OS's for which it was designed for: i.e. Windows 7, Windows 2008 R2 and earlier (also called Legacy OS's). Legacy graphics is highly optimised for legacy OSs and should be regarded as the first choice for those operating systems unless other factors are involved.

Legacy graphics mode is not tested or supported with modern operating systems: Windows Desktop OS: 8, 8.1, 10 or Windows Server 2012, 2012 R2 & Windows Server 2016.

Thinwire plus (aka: TW+ or compatibility mode) should be used instead and is the replacement for legacy mode.

• Documentation Thinwire Compatibility Mode
• Blog post: "To use or not to use?"

The above doesn't necessarily mean it will not work with modern operating systems. However, issues like: grey, frozen and black screens have been observed and reported.

Before calling your support representative please test the issue against Thinwire, the modern graphics delivery method.

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This article describes the support and applicability of legacy graphics mode to modern operating systems.