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Nene

Odd maximized window behavior

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Hi, I've experienced a really odd behavior with Vista SP1 and Directx 9: when I maximize or just resize the window to cover the entire desktop (without maximizing) the frame rate drops from 500fps to 10fps. Also, when Visual C++ is compiling or the CPU is doing intensive operations my mouse slows down a lot. I tested the same with two different applications, and the same problem comes out. I'm afraid this is a vista bug, I hadn't experienced this error before I installed SP1. Please, have you ever encountered a similar problem? Thanks

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The maximized window bug is probably due to your graphics card not being powerful enough - what card do you have?
Likewise with Visual Studio compiling. I've never had the compiling problem, but my laptop with crappy Intel graphics doesn't copy very well with a fullscreen 3D, even drawing a single triangle.

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I've got a HD 3650 AGP. However, the frame rate drops from 500 fps to less than 10 fps sharply, and I'm drawing a single triangle. It's not necessary to maximize the window: when I resize and cover the desktop completely the problem occurs (even if the resizing has been of only a few pixels!). I didn't have this problem before SP1, and my card drivers were the same. I've just removed Windows DreamScene, but nothing.

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I found out the frame rate drop only happens when matching the lower window border with the taskbar, independently of the window dimensions, even if there is a difference of 1 pixel. The frame rate at fullscreen is great. That's weird..

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Wasn't there some issue with the little Windows logo for the start menu overlapping programs and slowing them down? I remember hearing something about that. Test it out and see if intersecting with the taskbar but not the circular button causes issues.

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You're right!! It's not the taskbar, it slows down only when overlaps the circular windows button. Also, if I open the start menu so that it overlaps the DX window the frame rate drops again. How can I solve this issue?

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You can't, as far as I know. It's a known issue with Windows Vista.

Interestingly, the height of the taskbar is a little higher in Windows 7 and the orb doesn't stick out, so it's not really a problem there...

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The problem does not exist when I resize the taskbar so that the logo does not stick out. It only happens when matching the Window with the part of the logo that sticks out.

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