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NEANDERTHAL

GZDoom 2.1 : OpenGL driver not accelerated!

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So, I've just downloaded GZDoom 2.1. I try to start it, and it tells me

OpenGL driver not accelerated!

And ceases startup.

I've tried the other copy posted on the release thread for it, and downloaded the 1.9.whatever one. That says the same thing, tries to switch to the software mode, shouts "You must restart to change renders!" at itself, and then gives me a very fatal error.

I'm running Win 10 on a HP Pavilion. The computer originally had Windows 7, was then restored using a restoration disk to remove some awful viruses, and the upgraded to windows 10. That was over a year ago, though.

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You probably haven't installed OpenGL drivers. The drivers that come from Windows and Windows Update do not support OpenGL, you'll need to go to your chipset maker's website (Intel, NVIDIA, AMD...) and manually install the driver.

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But I was able to run GZDoom 1.0.5 just fine. I do have openGL drivers.

EDIT: Just used GL extensions viewer. It reports that I have GL version 3.1, which should be able to run 2.1, right? At least, it sure as hell should be able to run the 1.9.whatever one. I'm just not sure how, or what "OpenGL driver not accelerated!" means in this situation.

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What video card does your system have? The older Intel ones cab be pretty hit and miss. Also, not all games will work with a card that doesn't always have Hardware T&L, even if the driver formally reports that it supports OpenGL 3.1 or DX11.

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The V-card is most likely an Intel. The processor is intel, too. I don't have that laptop with me right now, though.

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Windows 10 + Intel? There's a very nasty and incredibly stupid bug in Intel drivers where they refuse to work with applications that report to be compatible with Windows 10. The only fix is to use a this tool to patch gzdoom.exe to remove the mention of Windows 10 compatibility from its manifest, and then it will work.

Just place it in the GZDoom directory, open a command window there (shift + right click) and run "wtfi gzdoom.exe". Alternatively, drag and drop gzdoom.exe on wtfi.exe, should work too.

And yes it's a really nonsensical bug and there's a reason the patching utility's name starts with WTF. But it's entirely Intel's fault, not GZDoom's.

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That sounds useful, but suspicious. I won't run it until I get confirmation that that executable does as it's described.

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NEANDERTHAL said:

That sounds useful, but suspicious. I won't run it until I get confirmation that that executable does as it's described.

You have the source code to it available if you want to check it out yourself and compile your own build; and the person who made it is the author of the port of GZDoom to Mac OS X. I'd trust him.

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