virtualbox having problems.
1/ keep on getting notice to change screen size to change from 16 to 32 ,how do change the pixels size
2/once installed using it twice, on the third time ,after username & password it brings up the Ctrl/Q log off has anybody been getting problems.
brian3

Hi,

Welcome to LQ!

I did notice your date as being Dec 2008. Hopefully you finally decided to participate.

A little more information about your configuration? What distribution, kernel, host OS?

VirtualBox will warn when the Guest display resolution or color palette is limited. You can disable that warning. The warning may be normal when booting some Guest operating systems in a virtual machine.

Here is some information that would be helpful to answer your question.

What version of VirtualBox are you using? Did you install the same version of the Guest Additions for your Guest operating system?

Is the problem happening in the Host OS running VirtualBox, or the Guest OS running inside a virtual machine?

Does the problem happen predictably when you do one particular thing or just randomly?

Are you using any desktop effects such as transparency, wobbly windows, etc?

VirtualBox does have some bugs. Here are some things that I recommend that you change or disable.

Disable desktop effects such as transparency in the Host OS and guest OS.
Disable serial port mappings.
Disable USB device support.
Use an AMD network interface in the Guest OS instead of an Intel network interface.
Set the graphics memory for the virtual machine to 64MB or lower (128MB seems to cause problems).
Disable hardware virtual features to see if they are causing the problem.
Disable recent features such as 3D graphics and multiple CPU cores.

Do not try to use a Windows created virtual disk image on Linux or a Linux disk image on Windows. Even though that usually works I've noticed that it isn't 100% compatible and sometimes crashes the Host OS running VirtualBox. The crashing problem tends to happen predictably when you do some particular thing resulting in expansion of the disk image file.

If you have a problem with a particular virtual disk image, try copying the files to a fresh virtual disk image. Once a virtual disk image is corrupted it will continue crashing the Host OS running VirtualBox.

You can also find information in the VirtualBox.org forums.

thanks for the reply onebuck,i have useing linux for about 4 years (ubuntu 8.4).
This started about month ago.before that had no trouble,i will get back to you.
brian3

thanks for the reply eric_FL ,i have been using virtualbox a long time had no problems,until month ago.
i will try those suggestions and get back thanks.
brian3