Windows 7 32bit Seeing Nvidia 8400M GT As Standard VGA, Sony Vaio

Dec 12, 2012

My System:

Sony Vaio VGN-FZ38M
Windows 7 Home Premium 32bit
Nvidia Geforece 8400M GT
Drivers tried - 306.97

[Code].....

Red entries are my edits. As you can see in nvmt.ini I've copied the Section numbers from the previous entries, as in: %NVIDIA_DEV.0426.9005.104D% = Section006, PCIVEN_10DE&DEV_0426&SUBSYS_9005104D

I've had some limited success...

My system now sees the GPU as an Nvidia 8400M. So far so good. However I'm still getting error messages. Firstly, on reboot, the system stops the card because of driver problems. Secondly, if I run the Nvidia software, it says the monitor is not connected to an Nvidia card. Lastly, if I update the driver, it reverts to Standard VGA in the Device Driver list.

So, It looks as if I need to do more. My immediate thoughts are:

1) Should I be editing the nvmt.inf file, or perhaps another one - nvmm.ini or nvlt.in? How do I know which nv??.inf to edit?

2) In the nv??.inf file, I have no idea which 'section' to point at. I tried 11 and 12 as seen in another thread, but got the same issues. So I tried the same section entries as the next most similar card, but to no avail.

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How I installed the latest Nvidia M 186.81 notebook driver to my Sony Vaio VGN-AR51E laptop. Sony is supposed to supply the drivers but they don't for some reason.

The latest laptop drivers from Nvidia work if you alter two lines of information in the appropriate inf file before executing. I downloaded the latest driver from Nvidia (186.81) and ran it so it unpacked into a folder in my C drive. [Message box says it won't install].

From Control panel I got my driver hardware ID

Control panel / Device manager / Display adapters / Properties / Details / Device description/

PCIVEN_10DE&DEV_0426&SUBSYS_9016104D&REV_A1

PCIVEN_10DE&DEV_0426&SUBSYS_9016104D

PCIVEN_10DE&DEV_0426&CC_030000

PCIVEN_10DE&DEV_0426&CC_0300

(You just need the second line here)

Then I opened up the Nvidia driver package and altered NVDM.inf file, in the Display folder, by adding two lines to include my hardware ID

(as you scroll down the inf file and study, you will see where these go, in two different list sections)

%NVIDIA_DEV.0426.01% = Section005, PCIVEN_10DE&DEV_0426&SUBSYS_9016104D

NVIDIA_DEV.0426.01 = "NVIDIA GeForce 8400M GT (Sony Vaio AR51E)"

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Don't forget to save all.

I deleted the old Nvidia driver rebooted and ran setup on the new Nvidia driver! It worked!! Hope this helps you. PYL

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