[visionegg] Re: Dropped frame detection reliability, frame histogram accuracy
- From: Timothy Vickery <tim.vickery@xxxxxxxxx>
- To: visionegg@xxxxxxxxxxxxx
- Date: Wed, 18 Aug 2004 21:32:58 -0400
Oh, that was it. My apologies! I didn't realize that it would switch
to a different mode when you changed to fullscreen. The psychtoolbox
didn't use OpenGL or DirectX, so the desktop settings were always
preserved. This might be a common mistake for people like myself,
transitioning from Psychtoolbox, so you may want to make this point
more forcefully on the framerates page. Believe me, I prefer this
inconvenience of having to change refresh rates to the inconvenience
of not having access to the power of the graphics card.
Thanks for your help, Martin and Andrew.
-Tim
On Wed, 18 Aug 2004 14:57:44 -0700, Martin Spacek
<mspacek@xxxxxxxxxxxxxxx> wrote:
> Hello,
>
> Yeah, running VisionEgg in fullscreen mode is like running a 3D game in
> fullscreen mode. The refresh rate settings for fullscreen are different
> from your normal windows desktop refresh rate settings. You might be
> able to go into one of the options menus in your video card driver and
> override the settings for OpenGL/DirectX. I know this is the case for
> the latest Nvidia and ATI drivers, and it's what I've been doing.
> Otherwise, you can try using one of the standalone programs for forcing
> refresh rates (http://www.visionegg.org/framerate.html). I gave
> powerstrip a try, but I found it really frustrating. I'd suggest trying
> refreshforce if you can't find any settings in you driver software. If
> you have a semi-modern monitor, it should be able to display its current
> frame rate on its on-screen menu.
>
> Cheers,
>
> Martin
>
>
>
>
> ----- Original Message -----
> From: "Timothy Vickery" <tim.vickery@xxxxxxxxx>
> To: <visionegg@xxxxxxxxxxxxx>
> Sent: Wednesday, August 18, 2004 9:18 AM
> Subject: [visionegg] Re: Dropped frame detection reliability, frame
> histogram accuracy
>
> > I hope you're not confused by the initial GUI screen asking for frame
> > rate -- this does not set it, it only tells Vision Egg what to expect!
> > (This is because there is no easy cross-platform way to set frame
> rate.
> > It may be possible on a platform-by-platform basis, but I haven't yet
> > felt like inflicting that pain on myself.) So, it sounds to me like
> > you're actually doing 60 Hz. What does your monitor tell you? The
> > average framerate computed by the Vision Egg?
>
> Well, this is strange. I did think it was odd that the
> targetBackground.py demo would be too much for my card to handle. I do
> have the video card set at the right frequency - 75Hz - and when I run
> programs windowed I get the time values clustered at 13ms, as you
> would expect. However, for some reason when I run any of the demos
> full screen, I get what appears to be a 60Hz refresh rate...
> To be absolutely clear, I have resolution set to 1024x768, 75Hz, and
> when I run any of the demos at this resolution, but leave the
> Fullscreen box unchecked, I get 75fps. Checking the box invariably
> gives me 60Hz. I never noticed this before. Any ideas?
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