I think this happened a few weeks ago after updating the system. Before that VirtualBox fullscreen menus worked fine.
The problem is, when I switched VirtualBox to fullscreen, the menu is totally not visible anymore, although the menus and buttons can still be clicked and they work as expected.
This is not an issue, just an incovenience as now whenever I want to minimize/close the VBox instance I need to blindly look for the location where the button is supposed to be and if I’m lucky I should be able to find it with only a few clicks.
I don’t know where I should look for as VBox is a Qt program probably affected by Kvantum, but it doesn’t seem to make any difference after fiddling Kvantum settings a bit.
Go to Settings of your virtual machine > User Interface and check “Mini Toolbar”.
See section 10 in this topic
It was checked.
It used to work correctly before.
Just tried checking and unchecking it. It doesn’t make any difference.
EDIT: Unchecking it makes the menu completely hidden that I couldn’t even click them anymore.
Just tried that as well. Doesn’t work either.
You are aware you may need to restart your virtual machine - right?
I know. I did the changes while Oracle VirtualBox (as well as the VMs) are not running.
Neither disabling composition nor enabling Translucent Windows worked. I did add VBox processes for the latter.
An update. Rebooted the host system after disabling composite effects kind of fixed it. I can see the menu now. Will see if the issue would resurface in the future.
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