[Solved] Guru Meditation error on VM launch

[Genesis30]

Hello!

I'm having trouble with starting my VMs on both Linux (Debian based) and Windows guests.

CPU: i7-9700K
OS: Win 10 Pro 64-bit
RAM: 32GB
VT-x: Enabled

The only things I've changed in the last days have been increased VRAM and added a new video mode:

vboxmanage.exe modifyvm "My VM Name" --vram 256
vboxmanage.exe setextradata "My VM Name" CustomVideoMode1 1920x1200x32

The error logs are attached (for a Debian based guest (Kali Linux)).

[mpack]

The only things I've changed in the last days ...

Meaning it worked before that?

... have been increased VRAM and added a new video mode:
vboxmanage.exe modifyvm "My VM Name" --vram 256
vboxmanage.exe setextradata "My VM Name" CustomVideoMode1 1920x1200x32

256MB is normally not available unless 3D acceleration is available, which it doesn't seem to be in your case. I'd definitely try undoing that change.

I don't know why you thought you needed 256MB VRAM anyway. 1920x1200x32 is only about 9MB per frame, so the usual 10 frame cache would only need around 90MB. The log shows you setting a display hint for a much larger display size: 2560x1335x32, 10 frames of that would be around 130MB, in practice 128MB would be fine for that as well. Happily the VM doesn't actually try to switch to the latter display size, so whether you can afford it is moot.

Triple fault usually means that the guest did something really nasty, e.g. execute corrupted code - and certainly your VM crashes an instant after starting to boot from the hard disk. Do you have a backup for this VM?

[Genesis30]

I've managed to get them booting by decreasing the VRAM. The resolution I used was 2560x1440 (1920x1200x32 was just an example). I recently installed a Windows 10 box and felt it sluggish, the increase in VRAM was just a test to see if it fixed some of that.

I've reverted the change and got them working again, so thanks for the tip! I thought the main GPU (RTX 2080) would be in charge, didn't think to enable the 3D rendering for this...

Thanks!

[mpack]

Thanks for reporting back.