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If you still have the green turtle and still get the VT-x is not available message To clarify: I now do not have the green turtle shown anymore, and the VT-x not available message is not shown anymore in the log ; the GUI is now loading also very fast; that's why I'm wondering all the more why a bu...

First, it is redundant to say "with VT-x enabled" Not an expert, so, sorry if the word choice in my first post was not ideal. But "VT-x is not available" does suggest that VirtualBox can indeed not use the VT-x hardware support, or not? And it does show the "turtle" sy...

I have two Ubuntu virtual machines (18.04, 20.04) and two other linux-based distros (fedora and cent os) running on a Windows host as part of a kind of CI build. On the Ubuntu machines, I have a clang compilation running every night; on the other machines a g++ compilation. The compilation on the Ub...

Thank, especially for the hint about downgrading! I have tried with 6.1.14 (first downgrading only VBox) - no change. I did notice however that there was a slight twist to above description - the machine's GUI / my script only started to run once I resized the viewed VBox. So I suspected the guest e...

I have a few Linux (CentOS 6 , Ubuntu 18.04 and Ubuntu 20.04, all with proper extensions installed) VMs running on a Windows 10 (1909), and which I was using for running some tests successfully until last week. Potentially with some VBox update (running latest 6.1.16 at the moment) starting the VMs ...