Definite solution to the nvlddmkm video crash on the P-7805u!

[andros_forever]

I've still been having issues with this error even after I flashed the BIOS. I will do a TIM replacement to see if it helps.

Check your GPU temps. If they are going above 80 then yes, some new TIM should help you out with that. I do it once every year.

[Mr. Man]

Check your GPU temps. If they are going above 80 then yes, some new TIM should help you out with that. I do it once every year.

After having done that, I am unfortunately still being plagued by this issue. I've almost given up hope

[TANWare]

After having done that, I am unfortunately still being plagued by this issue. I've almost given up hope

Ok, just to be sure, you are plagued by the shut down issue with the driver? if so most times it is the memory 2D-3D timing issue and heat too. once the heat issue is eliminated go after the timing issue by being sure the card stays in 3D timing.

Now as the card ages the memory bets weaker. At some point it may no longer like 3D timing. You will know this for sure if by running on battery only there is no crash as then it is usually stuck in 2D memory. Now this also runs it cooler meaning this could cause the system to now be more stable. This is why you HAVE too eliminate a heat issue first................

[Mr. Man]

Ok, just to be sure, you are plagued by the shut down issue with the driver? if so most times it is the memory 2D-3D timing issue and heat too. once the heat issue is eliminated go after the timing issue by being sure the card stays in 3D timing.

Now as the card ages the memory bets weaker. At some point it may no longer like 3D timing. You will know this for sure if by running on battery only there is no crash as then it is usually stuck in 2D memory. Now this also runs it cooler meaning this could cause the system to now be more stable. This is why you HAVE too eliminate a heat issue first................

I re-applied thermal paste using ICD7 and eliminated the heat issue. During intense gaming the card only rises to around 70C, when it beforehand rose as high as 80-90Cs in a hot environment.

I reverted back to driver version 197.16 and it seems to crash much less than the latest driver (289.something, I forget). But I still don't know what the issue is.

[madd1439]

Ok, just to be sure, you are plagued by the shut down issue with the driver? if so most times it is the memory 2D-3D timing issue and heat too. once the heat issue is eliminated go after the timing issue by being sure the card stays in 3D timing.

Now as the card ages the memory bets weaker. At some point it may no longer like 3D timing. You will know this for sure if by running on battery only there is no crash as then it is usually stuck in 2D memory. Now this also runs it cooler meaning this could cause the system to now be more stable. This is why you HAVE too eliminate a heat issue first................

This. This is my problem. I have removed heat issues and all that, but I may have got to it too late. Is there a way to force 2D memory? Or a way to replace whatever may be broken? I own the P-7805u and I also made my own thread the other day about my problem because I couldn't find a solution: P-7805u black screen crash during gaming

I tried the flashing method a while back with no success. I could try it again because i'm not sure if i did it right, but i put everything back to normal after it crashed again.

[Dbz Hertz]

This. This is my problem. I have removed heat issues and all that, but I may have got to it too late. Is there a way to force 2D memory? Or a way to replace whatever may be broken? I own the P-7805u and I also made my own thread the other day about my problem because I couldn't find a solution: P-7805u black screen crash during gaming

I tried the flashing method a while back with no success. I could try it again because i'm not sure if i did it right, but i put everything back to normal after it crashed again.

The only way it seems to fix it indefinitely is a mobo swap... This thread is epically long without a definite fix for some people.

[Mr. Man]

I would like to increase my GPU voltage since I believe undervolting is causing me more errors than before. How do I do this?

Edit: Nevermind. I just decided to raise it back to 1.12v.

[Hammerfest]

So if previously using Rivatuner and setting it always to performance mode...

Is this the recommended solution?

[Mr. Man]

So if previously using Rivatuner and setting it always to performance mode...

Is this the recommended solution?

After applying new thermal paste and raising voltage back to 1.12v, I've not had a crash since.

[fireslash]

Here is my story. A few months ago I got Limbo and started playing then noticed that the video card was under clocking because of heat issues, checked the temperatures and 80 to 90 Cº. The game is somewhat stressing on GPU but not that bad as other games. Since I barely played any games on the lappy I never had any issues, but after this incident with limbo I started having issues with other games like reckoning, the feared black screen, it was bad that I stopped playing out of frustration. I bumped with another post in here and there got a modded bios for the GPU with lower voltages in extra mode, this way it would never go above .9v this helped for some time, few weeks later the problem came back, finally I grabbed my vacuum cleaner set it in blow mode and did a clean up of the vents, also partially disassemble the laptop and cleaned the best I could (don't want to take it all apart) temperatures where better but the issue persisted, so I reinstalled Win 7 and waited to get my Diablo 3 copy and then black screen of horror, that led me to this post, got the files from andros but instead of flashing the modified bios I flashed the original one (lost my backup due to dead usb stick) then flashed motherboard with bios 9C.17 (was using 9C.23) and got the latest gpu drivers from nvidia (not beta) and that fixed the problem. Now playing D3 on highest settings and 1900x1200 (I think, not typing this from the laptop) and temps not more than 60Cº.

My Recommendations:

- As TANWare recommends get rid of your heating issues by any means necessary (I live in a dessert with ambient temps going as high as 50ºC on the shadow) so I keep my laptop near the AC and well ventilated using a metallic laptop stand also maintaining the cooling system is important.

- Recognize the difference between GPU bios and motherboard bios, the GPU bios is the one edited by andros and available in this post, the motherboard bios is available in one of the sticky post in here. What worked for me is 9C.17 because keeps the system cooler and the original GPU bios (in andros zip, remember to use winrar) but if you are not gaming or not stressing the gpu then andros modified bios should be a good option for you.

- If you decide to flash you card by any reason take this precautions. Back up your original bios, only edit your backup (Nibitor) and create .bat files to flash this way you can recover from a bad flash more easily, also and very important is to learn or configure your boot order in case of a bad flash, lets say you are using usb stick to boot into DOS then learn in what position your usb is in the boot order when you press F10 to enter it, also learn the timing to recognize when you need to press F10 and when DOS is ready to take a command, write down your .bat file names and you are ready to do a blind GPU bios recovery.

- Use a voltage regulator, this is so simple but sometimes overlook, variations in voltage can damage and create problems in your system.

- Do not overclock/underclock or change your voltages unless you have exhausted other options, like checking your power supply, updating drivers, fresh system install, etc

Sorry for long post but I hope it helps.

Special thanks to andros and TANWare.