Oracle crashes after switching to fullscreen

[vepar]

Hi,
My Virtualbox crashes when switching to fullscreen & it gives me this error:

"The instruction at 0x00000000 referenced memory at 0x00000000. The memory could not be written.
Click OK to terminate the program"

I'm using 4.3.26 r98988 version

First I thought maybe low video memory was causing it, & raised it to maximum, but it didn't help. I'm giving my virtual machine 8GB. What else can I doto fix this issue?

[loukingjr]

unless your host has 32GB RAM, 8GB RAM assigned to a guest is excessive. You should assign approx. 1/2 of the available RAM to a guest, not the total RAM.

[vepar]

unless your host has 32GB RAM, 8GB RAM assigned to a guest is excessive. You should assign approx. 1/2 of the available RAM to a guest, not the total RAM.

I didn't assing total ram, I have 16gb. Thought half of it would be fair. Will lower it & see it helps.

[loukingjr]

if you look at the vbox.log it will tell you how much available RAM you have. Use approx. half that.

[vepar]

if you look at the vbox.log it will tell you how much available RAM you have. Use approx. half that.

vbox.log says: "00:00:00.932140 Host RAM: 16324MB total, 13526MB available"

I lowered it to 4GB, but still didn't help. Any other options?

Also, I got resolution problem. Installed Windows 7 in Virtualbox, & it doesn't support my monitor's native resolution.

[loukingjr]

don't know what the native resolution is.

Attach the vbox.log (compressed) here.

[vepar]

don't know what the native resolution is.

Attach the vbox.log (compressed) here.

It's 1920x1080

Okay:

[loukingjr]

According to the vbox.log you posted…

00:00:00.658337 Host RAM: 16324MB total, 5452MB available

I'm not sure how you got the previous numbers but try reducing the guest RAM to 2GB.

I don't know where you got the Windows 7 .iso but this…

00:00:00.719416 File system of 'E:\Softwares\Operating Systems\windows 7 Sp1 Ultimate x64.iso' (DVD) is ntfs

does not appear to be an official install .iso

The log is not complete so I can't tell if the guest additions were installed which you need for screen scaling.
Make sure the guest is shutdown before you post the vbox.log.

[mhanor]

Does it crash if you disable 3D acceleration support, for the guest?

[Iain Argent]

I was having a similar problem, where VirtualBox would crash on suspending my Ubuntu guest machine (Windows 7 host). Turning off 3D acceleration fixed the problem for me. I am also running 4.3.26 build 98988.