id summary reporter owner description type status component version resolution keywords cc guest host 17304 seamless mode fails in Version 5.2.1 r119176 (Qt5.6.1) -> fixed after 5.2.6 matthewls "Though 5.2.0 works perfectly, and 5.2.1 works fine using standard windows and in full screen mode, the seamless mode causes both windows and linux guests to disappear. I can retrieve them using the hotkey+l, but the video is hidden or distorted in seamless mode. Host: AMD Fx370 32GB RAM, NVidia GeForce GTX 960/PCIe/SSE2 driver 387.22, Linux mint 18.2, kernel 4.13.15, KDE Plasma 5.11.3, QT 5.9.1. Guests: windows7-x64; Linux mint 18.1 x64, KDE 5.10.90, QT 5.7.1, kernel 4.11.3 I've attached the log file in case it's helpful" defect closed GUI/seamless VirtualBox 5.2.6 fixed other Linux