I always use remote desktop to shutdown main pc in bed.
A few days ago, I update windows patch. After the patch, I cannot connect main pc via remote desktop.
I check event viewer and find the error log.
The device Microsoft Remote Display Adapter (location (unknown)) is offline due to a user-mode driver crash.
Apparently there is an error around the display.
In my case, it is the cause that radeon driver is old.
I updated the graphic driver and I regained remote desktop.