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Old 02-24-2010, 08:28 AM   #1
daPing
 
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*UPDATED 02/03/10* - PC "Stuttering" issue advice

We posted the following advice to PC users in the “stuttering” thread;

“We are currently investigating this issue, which unfortunately wasn't found during extensive compatibility testing. We believe a few things may be contributing to this:

1) A combination of driver issues and the video memory manager that's used in Vista and Windows 7 under DX10 and 11. We're talking to Nvidia and ATI about this. This may also be responsible for the extreme memory usage that some people are seeing.

2) People using settings that are too high for the amount of VRAM in their video cards. Please note that if you adjust the texture detail settings then you must restart the game for this to take effect. There should be a dialog that advises you of this. Please try using the default Normal setting and seeing if that solves or reduces the problem.

3) The V-Sync and/or Reduce Mouse Lag options. The latter is found under the Controls options menu, not Video. Turning both of these off may help on Nvidia cards. This may be related to the problem described in point 4.xiv in the ReadMe.

As has been noted in this thread, playing the DX9 version instead should also solve this stuttering.

With regards to the low process priority that some people have noticed, this is intentional when you Alt-Tab out of the game, unless you are playing multiplayer. When you Alt-Tab back in, the process priority should return to normal.”


This appears to have caused some confusion which we will now attempt to clarify;

With regards to point 1 – Under the high and very high texture detail settings, there appears to be an issue when using DX10/11 in Vista or Win 7 that is caused by the video memory manager that is native to both versions of Windows when running DX10/11 and the way in which the drivers interface and allocate memory through it. This issue is being investigated by Rebellion and ATI/Nvidia collectively. If you are able to run AVP without encountering “stuttering” using the exact same settings in DX9 (which does not stutter) as you do in DX10/11, this is likely the cause of that discrepancy. If you are unable to run the game using the exact same settings in DX9/10/11 without encountering “stuttering” then the likely cause is described below.

With regards to point 2 – If you are setting the texture detail too high for your graphics card, it will cause the textures/data to be placed into the system RAM/page file which consequentially can cause the “stuttering” (but some system configurations will cope better than others) when the textures are swapped to the graphics card VRAM. This will be present in DX9/10/11 modes as the texture sizes are independent of the DirectX version. We highly recommend using the appropriate texture detail setting for your graphics card to ensure the best user experience.

Further driver updates and/or patches may improve the situation when running DX10/11 but the amount of VRAM required by the high/v.high texture detail settings will not change. If altering the texture detail setting does not solve your problem in any DirectX mode, please follow the advice in section 3 of the readme file – technical support will not be provided by Rebellion or SEGA through this forum.

Lastly, we have just been informed by ATI that the upcoming Catalyst 10.3 will address a crash that is present when running DX11 on an ATI DX10 card – there may be an interim hotfix driver but we are unable to confirm that at this time.
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Old 02-25-2010, 03:05 PM   #2
daPing
 
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A hotfix driver has been released for ATI cards and is available here.

We advise players to follow the recommendation of ATI and only install this if you are experiencing hangs/freezes (i.e. the game becomes unresponsive but does not crash)when attempting to run AVP in DX11/10 mode.
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Old 03-02-2010, 11:41 AM   #3
daPing
 
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Some users have reported in this thread that the latest drivers from Nvidia appear to address, or to some degree relieve the "stuttering" found in the DX10/11 version of AVP.

Although we have not heard anything from Nvidia (that they have a driver solution for this issue), we advise users to give the latest drivers a try, if all other attempts to solve this problem have failed.

[Edit]There are reports that these drivers are causing Nvidia cards to overheat and potentially fail. Please use these drivers with due caution, and follow all advise from Nvidia regarding this issue.

Last edited by daPing: 03-05-2010 at 03:22 AM.
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