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blnl 09-20-2010 07:06 AM

Screen artifacts when running VirtualBox
 
When the VirtualBox guest OS (WinXP) is started, the other desktop screens behave strangely.
It is difficult to describe how the issue looks like. Therefore, I have made a screenshot.
http://home.tiscali.nl/chaos_and_ord...x_artefact.png

Has anyone seen something like this before?
Does anyone know why is this happening and how to fix it?

Ramurd 09-28-2010 12:29 AM

looks like your videocard cannot keep up or does not get it's data provided fast enough. We don't really get enough information:
- how busy does your host get?
- how much memory do you have free on the host?
- is there (any) waitio involved?
- how high is the cpu-load on the host machine? (I think virtualbox video is rendered on the cpu rather than on the gpu)
- ...

blnl 09-30-2010 12:20 AM

Quote:

Originally Posted by Ramurd (Post 4110988)
looks like your videocard cannot keep up or does not get it's data provided fast enough. We don't really get enough information:
- how busy does your host get?
- how much memory do you have free on the host?
- is there (any) waitio involved?
- how high is the cpu-load on the host machine? (I think virtualbox video is rendered on the cpu rather than on the gpu)
- ...

You are right it was the memory issue!

I remembered that about a few weeks ago due to some memory problems I had to remove 1GB faulty memory from my machine. Still, I forgot to change the base memory allocation in the VirtulaBox settings (stupid mistake). As a result 760MB was allocated for the VirtualBox on a 1GM machine.

After reducing the VirtualBox base memory to 440MB, the host desktop behaves normally again.
So I believe this issue is solved now.


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