Compatibility Report

Does that happen on every single launch or only sometimes?

~~Affects multiple games https://github.com/ValveSoftware/Proton/issues/2818#issuecomment-516653299~~

Not using DXVK will work around it.

How exactly do you reproduce the hang?

The error message you quoted is normal and nothing to worry about; it's expected to happen when you change resolutions, or in case of Nvidia, even alt+tab out of the game when it is running in fullscreen mode.

Can you test if disabling "Allow Flipping" in nvidia-settings fixes the hangs? Does anyone have the hang issue on non-Nvidia systems?

@tannisroot Actually I am not sure about the pattern. Some times every single load game crashes, while some time it hangs in between.

@doitsujin I am not sure how can i reproduce the hang. I will test several times and will check if i could observe any pattern while crash.
I will perform testing with disabled flipping.

@doitsujin Tested by disabling flipping. Played around 30-40 minutes, no hang in between. The moment I went back to Novigrad from Skellige, the game crashed. Found below mentioned trace, I am not sure if it is related to crash.

35176.705:0027:0049:err:seh:RtlUnwindEx invalid frame 3af10008 (0x3ad12000-0x3af10000)
35176.705:0027:0049:err:seh:call_stack_handlers invalid frame 3af10010 (0x3ad12000-0x3af10000)
35176.705:0027:0049:err:seh:NtRaiseException Exception frame is not in stack limits => unable to dispatch exception.

Full logs : steam-292030.log

This particular crash was probably caused by doitsujin/dxvk#1100:

err:   DxvkMemoryAllocator: Memory allocation failed
  Size:      4147200
  Alignment: 256
  Mem flags: 0x6
  Mem types: 0x681

So, this is unrelated to the hangs you were experiencing (your original log doesn't contain that error).

If disabling flipping is consistently stable, we're most likely triggering a driver bug on Nvidia.

Tested and played around 10 hours, I can confirm that disabling flipping solves the hang issue.

Closing the issue.