Better late than never, here is an e-mail one of our tool developers sent me a few weeks ago regarding this problem.
> We've recently had numerous customers report the same issues to us. > Unfortunately our testing seems to indicate the problem is related to the > latest driver implementation provided by Nvidia. The problem seems to be > compounded by the use of multi-code/CPU machines and most OpenGL based > applications. > > Nvidia is aware of the problem and has noted issues in their release > notes for the current driver releases which can be found here: > http://www.nvidia.com/docs/IO/37395/93.71_open.pdf > "There may be intermittent application compatibility issues with dual core > CPUs. > If you experience this issue, first make sure you have downloaded and > installed the dual core > patches from your CPU manufacturer and from Microsoft. The Microsoft > knowledge base > article is available at: > http://support.microsoft.com/?id=896256. > If you still experience problems you can attempt to work around these by > toggling off > NVIDIA's multithread optimizations using the following instructions: > 1 Launch regedit and determine the current primary display card by > looking in > HKey_Local_Machine\Hardware\DeviceMap\Video > and note the GUID (global unique identifier assigned by Windows), which > is the long > string in brackets { } at the end of the entry > " > \device\video0". > 2 Look in > HKey_Local_Machine\SYSTEM\CurrentControlSet\Control\Video\{GUID}\0000 > where {GUID} is the number derived from the previous step. > 3 Open the " > 0000" directory and create a new DWORD called OGL_ThreadControl and > give it a value of > 2. This will disable multithreading in the driver for all OpenGL > applications. > 4 If you want to disable driver multithreading for all Direct3D > applications– > In the same " > 0000" directory, create a new DWORD called WTD_EXECMODEL and give > it a value of > 0." > > In-house testing has showed that this fix works for certain machines but > not all of them. One of our machines here required third party drivers > supplied by http://www.guru3d.com/. > > A few other fixes that have been found to work can be found here: > > http://www.hardforum.com/showthread.php?t=983781 > > We noticed on a few of the machines that if we disabled all but one > core/CPU in the BIOS, the problem would be eliminated. However this is not a > satisfactory solution for obvious reasons. > > If you check on the Nvidia forums you will see numerous posts with the > same complaints about OpenGL based applications running on the newest > hardware. > > http://forums.nvidia.com/ > Hope this helps On 8/17/07, Greg Udall <[EMAIL PROTECTED]> wrote: > > Prasant, > > I'm currently experiencing a similar problem. If your problem is infact > the same as mine it appears to be a problem with dual core processors and > multi threading rather than anything else. I've had this on both AMD and > Intel processors. > > Unfortunately, I'm working out of office so I cannot give you a > full account but I shall make an effort to post my findings on Monday. > > I posted this on the Nvidia developer forum a couple of weeks ago so it > might be worth keeping an eye on this: > > http://developer.nvidia.com/forums/index.php?showtopic=44 > > Regards > > Greg > > > On 8/16/07, Michael Ebner <[EMAIL PROTECTED]> wrote: > > > > Hi Prasant, > > > > take a look at your driver settings first, sounds to me like you are > > using "single display performance mode", as shown here: > > > > http://i189.photobucket.com/albums/z201/paloooz/Untitled-1-12.png > > > > (something like that should apply for ATI cards too, although i don't > > know the exact setting) > > > > regards, > > Michael. > > > > > > Prasant Vajjalu Rekapalli wrote: > > > I am using OSG with VS 7.1. > > > > > > When I move my application window (i.e. CompositeViewer window) from > > one screen to another on a computer with multiple monitors, > > > my application crashes. In particular, it seems as though it is taking > > an eternity for each frame to be processed. > > > > > > I am guessing that at each RESIZE (MOVE) event, I have to figure out > > which screen the application window is now on and update > > > the GraphicsTraits accordingly. > > > > > > Is this right. If yes, could anyone please tell me how to achieve > > this. If not, please tell me what the problem is. > > > > > > Thanks > > > -Prasant > > > _______________________________________________ > > > osg-users mailing list > > > [email protected] > > > > > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > > > > > > > _______________________________________________ > > osg-users mailing list > > [email protected] > > > > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > > > >
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