LinMudorck

8 minutes ago, Henrik9979 said:

Okay so you bought and already swapped card.

I bought the Sager NP3775 or Clevo P377SM-A already primed with gxt980m. But I was having a problem with the brightness adjustment in any version of Windows.

My problem with this laptop now is finding to buy the heatsink for VGA 2.

8 hours ago, Henrik9979 said:

Oh I was talking about the core swap what temps you used, what tools and what techniques to solder and desolder.

So, its don't my case. You may have gotten confused with other members in this topic. I have little instruction on how to do these physical recoveries and I also don't have the equipment for it.

Sorry for not being able to help you with that.

On 3/4/2022 at 3:36 AM, Henrik9979 said:

Sorry to interrupt you two, but can you share your core swap process. I am going to attempt it myself and would gladly hear some "do and don'ts" and get some good advice.

This is in case you have the same problem and the same equipment. We have a Motherboard P377SM-A or Sager NP377, with Video Card gtx980m. So I don't know what can happen if it's in another situation. I just found these instructions in another topic on this same site.

The instructions refer to creating a key in Regedit for Nvidea so that the brightness adjustment function works again. The guidance provided by @Prema to @i_pk_pjers_i are as follows:

1) Press Win+R

2) In Run: Type Regedit and Press Enter

3) Open regedit and go to the "HKEY_LOCAL_MACHINE/SYSTEM/CurrentControlSet/Control/Class/{4d36e968-e325.../0000" key. Click on "0000" on the right side, a list of keys, commands and directions will appear.

3 Alternative) Find the sub-key corresponding to the NVIDIA graphics adapter. I did this by going to Find in the Edit menu and searching for "nvidia". A list of keys, commands and directions will appear with an Nvidea key checked, probably in the same folder. Can be run with Crtl+F, put Nvidia and confirm.

4) Add a new DWORD called "EnableBrightnessControl" and set the value to 1. For this you click with the second mouse button on an empty space. An option will appear "New > Dword Value (32bits)" and name this key as "EnableBrightnessControl". Once that's done, you double-click to open the key and in "Value Data:" You put "1", without quotes. And confirms.

5) Reboot and the brightness keys should work again."

Just to let you know: In the case of i_pk_pjers_i, everything seems to be working perfectly again. In my case, the fn+F8/F9 functions for brightness adjustment stopped working. But the brightness adjustment bar is working correctly. And one caveat, it is enabled for the adjustment to reach 0, be careful not to lose the screen image and not be able to readjust.

I'm not an expert if something doesn't go as expected. But in this case there is always the possibility of Formatting Windows, in case of any problem.

On 10/14/2021 at 5:57 PM, Wacholek said:

I know that it is an old topic but I was inspired by it and made the same change. 

I have Clevo P377SM-A. 

Card did fired up on my test HP 8760w without any problem. Normal NVIDIA drivers installed. I could access to BIOS and have brightness control. 

But...

When I put this cards into my Clevo P377SM-A I have black screen until Windows boot with the drivers. Than I can play and do everything and card is running great. 

And there is no brightness control. I tried to mod the drivers but no luck. 

 

Anyone had similar problem? 

I had the same problem, in the same situation.

I managed to solve it with the link above.

All that remains is to resolve the issue of the fn+F8/F9 functions for the brightness intensity.

On 8/1/2015 at 3:08 PM, i_pk_pjers_i said:

I looked through the emails that Prema sent me before. I tried something he suggested before and it didn't work before (or perhaps it did, because eventually brightness started working on 8.1).

He suggested this to me:

"Your BIOS and EC are fine now, must be the fact that Windows was setup with broken BIOS.

Try to add it manually:

1) Open regedit and go to the "HKEY_LOCAL_MACHINE/SYSTEM/CurrentControlSet/Control/Class" key.

2) Find the sub-key corresponding to the NVIDIA graphics adapter. I did this by going to Find in the Edit menu and searching for "nvidia".

3) Add a new DWORD called "EnableBrightnessControl" and set the value to 1.

4) Reboot and the brightness keys should work again."

I did it just now, and it worked again. To me, it seems like this fix should work for any non-iGPU display/laptop that doesn't have any working brightness control.

Well, I'm good for my word, so I'm going to donate to Prema again (this is like the 4th time I have donated to him, he really deserves every penny of it).

Mods, you can close this topic now.

If I weren't an economically screwed Brazilian I would also send money to you or even to him.

I was living in this hell of a screen brightness problem and I was sure it was a problem with the key in regedit, I just didn't know how to solve it. And worse, neither Nvidea nor Microsoft knew either.

Thank you so much for that!

Now there is only one outstanding question.

How to put the brightness adjustment in the functions fn+ F8 to decrease the intensity and fn+F9 to increase the intensity?

Would you know how to solve it?

There is one more info, I added the key in 4d36e968. But there are several subfolders with nvidia