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Thread: Dota 2 Crashes “failed to lock vertex buffer in CVertexBufferDx9”

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Dota 2 Crashes “failed to lock vertex buffer in CVertexBufferDx9”

When I play Dota2, immediately I am taking “failed to lock vertex buffer in CVertexBufferDx9” and I have to close the game. I can start the game again but I am taking same errors (sometimes after 2 mins, sometimes after 5 mins) again and again. I have directx 12 version and my driver nvidia 630m. I already verified dota 2 folders. Also, I deleted the game and steam and I installed them again. It did not work. Before the error, red and blue squares occurs on my monitor. HELP ME PLS.

630m is a crap notebook card plagued by such issues, and since you get red and blue squares. it points towards it being faulty and on it’s way to the graveyard.
Make sure you have the latest drivers from your notebook manufacturer for both the nvidia and the intel onboard gpu’s.
TDR Manipulator might help, read upon that.
Use DOTA launch options: – dx11 – dxlevel 101

Firstly, thanks for answer. But I want to mention that Dota laucnh options did not work unfourtanetly. I read the TDR manipulator but still I have no idea how can I use it? Can you help me? Is there more option to solve the problem?

These are the recommended settings for TDR Manipulator:

Won’t help much if the hardware is busted.

On the other hand, adding more cooling (cleaning vents, changing thermal grease, using a cool pad) always helps.
Like I said, 630m is crap, very old Fermi power-hungry, hot crap. Can’t expect much from it, specially if it was hosted in a non-brand notebook without adequate cooling.

You can also try lowering the load by setting graphics options to a minimal (lower than what’s available in the GUI):

and probably adding launch option: +fps_max 30

Last edited by aveyo; 05-03-2017 at 01:44 PM .

These are the recommended settings for TDR Manipulator:

Won’t help much if the hardware is busted.

On the other hand, adding more cooling (cleaning vents, changing thermal grease, using a cool pad) always helps.
Like I said, 630m is crap, very old Fermi power-hungry, hot crap. Can’t expect much from it, specially if it was hosted in a non-brand notebook without adequate cooling.

You can also try lowering the load by setting graphics options to a minimal (lower than what’s available in the GUI):

and probably adding launch option: +fps_max 30

I can not open the image for TDR. Could you send it again please? I am taking similiar error in CS:GO. The only solution looks like buying new computer but sometimes solutions are not affordable. Also, I cannot open user. cfg link. Idk why? If you able to, can you send that, too? Thanks for your help.

Btw, I changed thermal grease two weeks ago and one week ago everything was perfect. My laptop’s brand is Acer. I am still trying to handle it.