Photoshop CS4 not letting me enable OpenGL

M
Posted By
Matias89G
Nov 10, 2008
Views
574
Replies
1
Status
Closed
So, a friend of mine recently bought an adobe suite, and wanted to test out the new live canvas rotation. He called me up the second he got his hands on it and was leading me through the process. He finally got through the installation and booted it up. Problem is, when he tried to use the canvas rotation tool it said that OpenGL was deactivated.
I told him to check the preferences so he did. It was indeed deactivated, but it wouldn’t let him activate (something about updating the drivers or hardware).
I updated the drivers for him about two days prior (it’s got a 7950gx2 on there) and the nVidia control panel reflects the change, it reads as 178.24.

I thought it might just not be picking up the hardware at all, but when I finally went over there and checked "System Info" from within the help tab in photoshop it came up with this:

Operating System: Windows Vista 32-bit
Version: 6.0 Service Pack 1
System architecture: AMD CPU Family:15, Model:3, Stepping:2 with MMX, SSE Integer, SSE FP, SSE2
Physical processor count: 2
Processor speed: 2611 MHz
Video Card Vendor: NVIDIA Corporation
Video Card Renderer: GeForce 7950 GX2/PCI/SSE2/3DNOW!
OpenGL Drawing: Disabled.
Video Card: NVIDIA GeForce 7950 GX2
Video Mode: 1024 x 768 x 4294967296 colors
Video Card Driver: nvd3dum.dll,nvwgf2um.dll
Driver Version: 7.15.11.7824

I even went into the nVidia control panel to try and force some setting and see if photoshop would respond, only to find that it already has a special "Performance Mode" default setting and changing anything doesn’t help anyways.

So, any ideas on what could be the problem? I am going to tell him to try some beta drivers and see if it has any effect, anything else he can try?

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M
Matias89G
Nov 12, 2008
Solved it! After visiting this forum: http://www.adobeforums.com/webx/.59b6c155/18 I found out there was a registry entry to make photoshop accept any card thrown at it.
The entry, for those of you too lazy to check (but still having registry knoweledge) is
[HKEY_CURRENT_USER\Software\Adobe\Photoshop\11.0]
"AllowOldGPUS"=dword:00000001

Your computer may not handle using the GPU very well, but now at least you’ll get a chance to find out.

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