DWM potential issue with NV GPU - Githubissues

ionuttbara / melody_windows

Melody Optimization Script for Windows

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DWM potential issue with NV GPU #25

Closed velaar closed 5 months ago

velaar commented 6 months ago

These is a kind of issue that makes me wish the EventViewer was operational.

When switching to full screen playing a video H.265 or H.264 NVidia driver crashes to black screen. Network becomes unresponsive so can't see what actually is happening. The issue seems intermittent and comes after long watching sessions.

Resetting DWM to stock on W11 23H2 seems to fix the issue. So it is likely DWM reg. pending further testing.

Set up is RTX 4090 connected via 48Gbit HDMI to LG C1 TV so Gsync + HDR + 12bit RGB. The crash seems to happen on full screen only so suspect modesetting.

@ionuttbara anything in your experience that I should try to diagnose further?

ionuttbara commented 6 months ago

hi @velaar ! thx for reporting the issue. i will check this and testing.

ionuttbara commented 6 months ago

fixed in 15.3 third release. you must remove dwm configuration from HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\Dwm and apply it again. if any problem persists feel free to re-open the issue.

velaar commented 6 months ago

@ionuttbara
Looks like the changes didn't go through. What was the change exactly?

ionuttbara commented 6 months ago

in realeae file.

ionuttbara commented 6 months ago

go to release -> change some values in dwm_registry.reg remove some ddraw usage conf. in dwm.

ionuttbara commented 6 months ago

https://github.com/ionuttbara/melody_windows/releases/tag/release153_3

velaar commented 5 months ago

@ionuttbara The most recent release crashed again. Looks like ~~ParallelModePolicy=2~~is not compatible with my GPU. Added to my overrides. Consider removing in the next update.

Update: still testing to identify the setting. As it seems to be intermittent.

ionuttbara commented 5 months ago

how to get that to crash? i need more details.

velaar commented 5 months ago

Re-closing. Apparently nVidia is doing something weird with the Nvidia Frame View SDK via Nvidia app there. Can't reproduce without the app. Seems to crash on a desktop -> full screen transition (example - playing a video full screen or launching a game in a non-borderless mode). Went away from Nvidia app in favour of Nvidia Profile Inspector and NvTrueHDR as RTX HDR is nice. :)

On a bright side Nvidia app also does not work with blocked internet access causing more delays/issues.

Hope this comment helps.

velaar commented 5 months ago

Closed as per comment above

velaar commented 5 months ago

@ionuttbara

Alright, back at it. After a LOT of testing and finally finding a reproduceable-enough nvkern crash I can report that some games some times crash if

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\Dwm]
"ParallelModePolicy"=dword:00000002

No crash with "ParallelModePolicy"=dword:00000001 or "ParallelModePolicy"=dword:00000004. I know that 0,1,2,4 are legit settings. But do you have any source info on what this parameter does exactly? I currently set it to 4 for testing.

Note: the game that reliably crashes for me on launch with it set to 2 is StarCraft 2.

ionuttbara commented 5 months ago

i see i'll check more. parallelmode numbers of tasks for cpu/gpu render in parrallel. i putting 2 for optimize v-sync for amd gpus, but in nvidia gpu is not working o well.

26100 is having in dwm.exe implemented to run 4 by default, but reducing number it gets stability. you can put 4 if does not affect./

next verion of melody is 1.

ionuttbara commented 5 months ago

0 is disabling limitation.