[vtkusers] [vtk-developers] Weird problems on VTK Rendering using nVidia Optimus technology

[David Gobbi]

Hi Wagner,

A google search of "nvidia optimus bugs" reveals that you are not alone:
http://forums.nvidia.com/index.php?showtopic=190790
It's probably best to follow up on the nvidia forums.  Or you can just
wait for a fix to appear... this bug apparently makes Maya useless on
Optimus, and that is something that NVidia will not be able to let
slide for very long.

 - David


On Mon, Apr 11, 2011 at 9:39 AM, Wagner Sales <wsales at gmail.com> wrote:
> Hi all,
>
> I´ve purchased two laptops that´s comes with the nvidia optimus
> technology: an Asus 1215N and a AlienWare MX11 R2. Using this machines
> I´m facing with problems in vtk rendering that´s I never seem. After
> some research, I´m tryng to put all the relevant information on this
> message to give some help on solve or on help to debug the problem.
> When I have multiple render views on the screen, the render views
> appears to not be rendered in a correct order and location. A case:
>
> - I have a quadview to view three orientations of an volume ( axial,
> coronal and sagittal ) and a 3D view to render some segmented objects,
> not volume. In update, the views simply don´t render in correct place:
> the saggital appears on the coronal view, and 3D in axial, and so on.
> If my quadview uses the 3D view to render a volume via GPU raycast
> mapper, this will not occurs with 3D view, and only 2D views will have
> problems.
>
> Since I got theses problems, I tryed to use others softwares packages
> to simulate:
> - Slicer ( latest .exe version )
> - MITK 3M3 ( latest version, wich uses VTK 5.4.2 )
> - Compiled MITK version from git
>
> All of this packages, in all situations, reproduces exactly the same
> problem. I´ve compiled the application with and without
> VTK_USES_QTOPENGL advanced option. After all of this, I have some
> conclusions that´s can helps to find the problem:
> - two different machines, but two uses nVidia Optimus
> - two different Windows versions ( one comes with W7 32bit Premium and
> other with W7 Ultimate 64 )
> - various programs using VTK and Qt, not only my own developed piece of sofware
> - the 3D GPU volume mapper works fine in all cases
> - all the machines uses the latest nvidia driver version ( but the
> problems was ocurred before the update too )
>
> I really don´t know to solve or to find this, and I´ll very proud to
> help to find the problem.
>
> Best Regards,
>
> Wagner Sales