How do you wake up CentOS7 from suspend mode in Virtual Box?
 

To reduce power consumption,
I suspended CentOS7 in virtual box like so:

systemctl suspend

The it turns into a black screen.
But when I click inside the black screen,
there is no response.
I have to shutdown virtual box and re-start.

How do you wake up CentOS7 from suspend mode in Virtual Box?

Mine does the same so I dont use Suspend on the guest OS. I use the Pause feature on VirtualBox which can be found on the Machine drop-down menu, or by right-clicking the vm on the VirtualBox Manager.

Thank.
Not sure if that save power by pausing this way.

How to you un-hide the toolbar in the VM?
That toolbar with menu items like Machine, ...

I also just clicked status bar, and it disappeared.
I did not see any provision to un-hide those bars!

Answer to self:

In VM do this:

<Right-Ctrl> + <Home>
View > Menu Bar > Show Menu Bar


<Right-Ctrl> + <Home>
View > Status Bar > Show Status Bar

Not sure either. I don't do it save power though.


HostKey + <HOME>

My host key is the right Ctrl key, which if I remember correctly is default.

This will pop-up menu, go to View and you will see Menu Bar and Status bar. Here you can show/hide.

ha you beat me.

Thank you for your help.

You're welcome.

One more question:
What do you use it for?

I use it instead of turning off the VM. I guess there's no good reason to use it now after doing some research. I just read this
https://www.virtualbox.org/ticket/8368

Never gave it much thought.