SpaceDesk Not Extending Display

#1 · 17/01/2026, 23:08

Hi. Just installed Windows on a Windows 11 Home 64 bit machine, the Viewer on an Amazon Fire and Samsung Android phone. All three have updated drivers. I also have an old Acer Spin Windows tablet that I installed the view on.

None of these devices will extend the desktop. I am aware that the Android phone would only Duplicate, but I thought the Fire Tablet and old Windows tablet would allow extending. I’ve reviewed all 24 pages of support questions and couldn’t find anything.

Thanks! Oh, free personal version.

#2 · 19/01/2026, 06:18

Hi @cathy,

Please refer to the Documentation in the section Configuration and Settings > Windows Driver (Primary Machine) > Desktop Extension or Desktop Duplication (mirror) Settings in Display Control Panel for instructions on how to extend your main display to the spacedesk Viewer screen. Thank you.

#3 · 14/02/2026, 17:30

Could you also please confirm if there are any specific driver settings or resolution adjustments recommended for smoother performance,when using Desktop Extension mode?

#4 · 16/02/2026, 01:52

Hi @mirkamay,

Please refer to the Documentation in the section Performance Tuning to see possible tweaks to improve performance. Thank you.