[Sidefx-houdini-list] GPU refresh issues (win x64)

Jeff Wagner jeff at sidefx.com
Wed Feb 21 10:59:54 EST 2007


Please do make the list!


-jeff

Gregory Karydis wrote:
> Found a solution!
> [Many thanks to Jeff Wagner for the eye-opener]
> The environment variable trick works (albeit slow as already 
> mentioned) but it helped me to a great extent to identify the source 
> of the problem.
> nVidia drivers for non Quadro GPUs have a bizzare way of handling the 
> OGL spec.
> The solution came in the form of RivaTuner.
> With that ever so useful app you can force the nVidia driver to work 
> in compatibility mode while using all of it's resources so you get no 
> lag whatsoever.
> This works with any Forceware drivers out there and can be applied to 
> any version of windows from Win XP to Vista 32bit or 64bit.
> In effect it uses the same environment variable but instead of running 
> from the CPU it runs from the GPU.
>
> Since this works rather well, I will make a step by step guide and 
> post it in the forums one of these days.
>
> Thanks,
> gregory
>
> ----- Original Message ----- From: "Jeff Wagner" <jeff at sidefx.com>
> To: <sidefx-houdini-list at sidefx.com>
> Sent: Tuesday, February 20, 2007 11:00 PM
> Subject: Re: [Sidefx-houdini-list] GPU refresh issues (win x64)
>
>
>> When Windows XP boots in to safe mode, the default graphics drivers are
>> bypassed as you know. Windows XP has OpenGL embedded in it and will run
>> in software only mode in safe mode.
>>
>> You can bypass the hardware OpenGL acceleration by setting the
>> environment variable:
>>        HOUDINI_OGL_SOFTWARE = 1
>> Do a search on the Side Effects forum for enabling software acceleration
>> (disabling hardware acceleration).
>>
>>
>> -jeff
>>
>> On Tue, 2007-20-02 at 21:25 +0200, Gregory Karydis wrote:
>>> had a few power outages during the day and the system in question had
>>> to
>>> boot in safe mode after shutting down ubruptly.
>>> While in safe mode and ready to restart my computer normally I thought
>>> "why
>>> not?" and fired up Houdini which miraculously performed without a
>>> hitch and
>>> without the annoying refresh issue.
>>>
>>> I think it's all down to the drivers after all.
>>> I will document my progress in case someone else has the same problem
>>> in the
>>> future.
>> -- 
>> Jeff Wagner, jeff at sidefx.com, Senior Technology Consultant
>> Side Effects Software, www.sidefx.com, Toronto, Ontario, M5V 3E7
>> tel: (416) 504-9876, fax: (416) 504-6648
>>
>> OldSchool Blog:
>> http://www.sidefx.com/index.php?option=com_content&task=blogcategory&id=115&Itemid=216 
>>
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>
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-- 
Jeff Wagner, jeff at sidefx.com, Senior Technology Consultant
Side Effects Software, www.sidefx.com, Toronto, Ontario, M5V 3E7
tel: (416) 504-9876, fax: (416) 504-6648

OldSchool Blog: http://www.sidefx.com/index.php?option=com_content&task=blogcategory&id=115&Itemid=216





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