Debian guest black screen

[MangoLinux]

I am running Vbox 6.0.10 on Windows 10 and I have a Debian guest that boots up to a black screen but while it boots up the screen changes from full screen to small screen several times.

[mpack]

00:00:02.742566 Host RAM: 8076MB (7.8GB) total, 2767MB (2.7GB) available
...
00:00:03.258316 RamSize <integer> = 0x0000000100000000 (4 294 967 296, 4 096 MB, 4.0 GB)
00:00:03.258605 VRamSize <integer> = 0x0000000008000000 (134 217 728, 128 MB)

I'm surprised the VM boots at all with this gross resource conflict. Free up host RAM, and you'll need to drastically reduce that guest RAM assignment.

[MangoLinux]

I freed up as much memory as I can and reduced the guest RAm to 512MB issue is the same. new log updated. This was working on Monday

[socratis]

and reduced the guest RAm to 512MB

00:00:00.382482 Host RAM: 8076MB (7.8GB) total, 4809MB (4.6GB) available

Maybe you've gone a little bit overboard. You can definitely afford now 1.5 or 2 GB.

This was working on Monday

What happened on Tuesday and later?

00:00:01.255662 VRamSize <integer> = 0x0000000001000000 (16 777 216, 16 MB)

Increase that to 32, 64 or even max it out at 128 MB.

00:00:00.328215 VirtualBox VM 6.0.10 r132072 win.amd64 (Jul 12 2019 09:34:54) release log
00:00:16.503044 VMMDev: Guest Additions information report: Version 5.2.22 r126460 '5.2.22'

You should attend to this as soon as you get your "vision" back...

00:00:01.577098 AIOMgr: C:\Users\123917\VirtualBox VMs\parrot-security\parrot-security-disk002.vmdk

Why is there only a disk002.vmdk there? Was there a disk001.vmdk?