Nvidia employee explained[www.nvidia.com], the final solution is multi-faceted and will include three fixes:

1. NVIDIA's next Game Ready Driver, will include a fix for an edge case where an application may crash when switching into RealTime threaded priority. As of now, Game Ready & Studio Driver 581.57 includes fix for "Steam overlay may cause game stability issues [5521892]"

2. Valve will also be moving the overlay software down in priority in a future Steam update.

3. NVIDIA will be assisting in the Quality of Service (QoS) for the Steam overlay in their next driver branch.

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Nvidia employees received the necessary dump files. They stated that, in their words: "It appears this is caused from the Steam Webhelper running in realtime thread priority."

It's my understanding that they are currently working on identifying the specific causes and will be looking to resolve it. In the meantime, they have advised using a workaround by either disabling the Steam overlay or disabling hardware acceleration in Steam.

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Launch Steam with the -disable-overlay-gpu-pri option. If you do not know how to launch Steam with options, then visit this guide

UPD: this workaround works not for everyone, so it is better to disable GPU acceleration for steam web views

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I get a PC freeze and a black screen when I open Steam overlay, for example to view my teammates profile during the preparation for a match. I always do this and this an issue has never happened, I am really confused because it forces me to reboot the PC using the button on the PC case. In the Event Log I see a lot of "nvlddmkm" errors when this happens. All other games work fine. Temperatures are good, OCCT tests pass without any errors. This started happening recently.
Specs:
RTX 4070 Super
I5-14600KF
32RAM
Windows 11 24H2
Driver: 576.02

Someone have same issue?


There is no need to do DDU, this issue is not related to drivers, because people with different driver versions also talked about it. This issue is related to the latest Steam update on May 20, after that something broke. And yes, it is not tied to one CS2, it can happen with all games, so I highly recommend disabling the Steam overlay. Also, for some reason, the Discord overlay can save from this if it is enabled (possibly the Nvidia overlay too), I can't reproduce this issue while using the new Discord overlay.

My thoughts are that something conflicts with Windows 11, because in the latest stable versions of Windows 11 there are some problems with MPO (MultiPlane Overlay). I have already reported this issue to Steam support.

We need to wait for a fix from Valve.


For those who installed the update KB5058499 for Windows 11 24H2, please let me know if this issue is fixed after the update

Several people confirmed that the KB5058499 update did not solve this issue, also using Windows 10 instead of Windows 11 24H2 also does not solve it. Therefore, this is the fault of the Steam Client, Valve needs to notice all of us.


I received a new response from Steam support, where they told me that they forwarded my report to the developers and that we all should follow the updates. However, for some reason they will reproduce this issue in CS2, probably because I said that I initially noticed this issue in this game, I don't know but ok.



It is the Steam Overlay that crashes the driver, which is why the screen freezes and then there is a black screen without losing the monitor signal, this is what "nvlddmkm" errors means in this case.
If it was the driver's fault, people with a driver that came out in 2022 wouldn't write that they have the same issue. If it was on the Windows side, people wouldn't be writing that they have Windows 10 and the same issue started happening at the same time as users of the latest Windows 11 24H2 (And I want to remind that Windows 10 hasn't received any updates other than security updates for a long time). Therefore, this is the fault of the Steam client update for May 20 (or most likely the previous update before May 20).

Thread on the Steam forum: https://v1.steam.hlxgame.cc/discussions/forum/1/601905151053177514/