virtualbox.org

Hi,

why do I get different graphics renderer when installing guest additions 4.3.8 in Win 7 vs. Win8.1?
Furthermore why is the renderer installed under Win7 (OpenGL 2.1) more capable than the one installed with Win8.1 (OpenGL 1.1)?

I am trying to use a OpenGL based CAD application in Win8.1 using VBox 4.3.8 on Ubuntu 13.10.
Because of the reduced capabilities 3D performance in Win8.1 is extremly low.

Any ideas why the Win8.1 renderer using the vbox guest additions has reduced capabilities?
Any ideas how to improve OpenGL performance under Win8.1?

VBox:
- 4.3.8 r92456
- Guest addition 4.3.8 installed in Win7 and Win8.1

Host:
- OS: Ubuntu 13.10, 64bit
- CPU: AMD Phenom(tm) II X4 955 Processor × 4
- GPU: GeForce 210/PCIe/SSE2
- RAM: 4GB

Guest Win7:
- OS: Win 7 HomePremium 6.01.7601 Service Pack 1, 64bit
- CPU: 2 CPUs
- RAM: 1536 MB
- VRAM: 128 MB, 2D and 3D acceleration activated

- OpenGL Extensions Viewer 4,1.5
- Renderer: GeForce 210/PCIe/SSE2
- OpenGL: Version - 2.1 Chromium 1
Driver - 4.3.8.0, 25-Feb-14
- DirectX: Version - 9.0c - June 2010
Shader - vs_2_0, ps_2_0

- dxdiag: Guest Win8.1:
- OS: Win 8.1 Pro Build 9200, 64bit
- CPU: 2 CPUs
- RAM: 2048 MB
- VRAM: 128 MB, 2D and 3D acceleration activated

- OpenGL Extensions Viewer 4.1.5
- Renderer: GDI Generic
- OpenGL: Version - 1.1
Driver - 4.3.8.0, 25-Feb-14
- DirectX: Version - 9.0c - August 2004
Shader - vs_2_0, ps_2_0

- CAD OpenGL-Diag: - dxdiag: Best regards
Bernhard