Hi @s-h-e-i-k-h,
Thank you very much for reporting this issue.
Display Off status means that the display is detached to your primary machine which is not the case on your side.
spacedesk should show a connected black screen upon locking the desktop.
Can you please send us the diagnostic logs for this issue.
– open the spacedesk Driver Console window then click the Diagnostics on the left side panel
– if Debug View is not available, please click the download button first
– switch Diagnostic Collection ON by checking the box (make sure to click Yes in the User Account Control box to proceed)
– try to connect your viewer app and lock your desktop to reproduce the issue
– after a while unlock your desktop and get back to spacedesk Driver Console to switch off the Diagnostic Collection by unchecking the box
– click Save All Information button
PS: Saving all information will take a few seconds, then please send us the whole folder which contains all the diagnostic logs collected.
Please right-click the folder -> Send to -> Compressed (zipped) folder, then attach the *.zip file in your next reply.