On Wednesday September 21 2016 23:14:24 Matei David wrote: >responsible for locking the host screen (dbus??) doesn't react to that >event. The fact that I see the acpi event on the host leads me to >believe this is not a VirtualBox problem. I'm tempted to think that it *is* a VirtualBox issue: in fullscreen mode it tries to behave as much as possible as if you're not working on a VM guest. It doesn't surprise me that it tries to catch power-related events too. I'd suggest you ask on Oracle's VirtualBox forum if there's a way around (like a setting to let the host handle these events) and if not, file a ticket with a request. >Is there some way to fix this in KDE? Right now the hack I have in >place is a custom script triggered through /etc/acpi/events . The >problem with doing it this way is that in certain situations the >session is locked twice, because the systems are independent of each >other. Can you just tell VirtualBox to drop out of fullscreen mode and then let the host continue processing as usual? Personally I usually do this manually and then pause the guest before I suspend the host. Enough happens on wake-from-suspend that things usually go smoother if there isn't also a VM guest (which typically has a huge memory footprint) that tries to do those same things at the same time. R.