DLSS 4.5 UE 5.7.4 MFG crashes with Pacer flush timed out

Gaming and Visualization Technologies DLSS
,
1

Hi,

I’m intergrading DLSS v8.5.0 UE plugin into UE5.7.4, occurred a GPU time out crash when MFG enabled. I had Reflex enabled, FG 2x and auto mode work fine. Here is the crash log:

LogStreamlineAPI: Warning: [15-50-46][streamline][warn][tid:54300[24s:093ms:060us]thread.h:221[flush] Worker thread ‘sl.pacer’ timed out

LogStreamlineAPI: Warning: [15-50-46][streamline][warn][tid:54300][24s:093ms:202us]dlfg.cpp:636[processFrame] Pacer flush has timed out on frame 1012.

LogD3D12RHI: Warning: GPU timeout: A payload (0x000002A55D698350) on the [0x000002A102A53A40, 3D] queue has not completed after 5.000001 seconds.

LogRHI: Warning: Active GPU breadcrumbs:
Device 0, Pipeline Graphics: (In: 0x80d30428, Out: 0x80d303e3)

    (ID: 0x80d301aa) \[     Active\]  Frame 20539

    (ID: 0x80d303e3) \[     Active\]      RenderGraphExecute - 

    (ID: 0x80d30426) \[     Active\]          StreamlineTagTextures

    (ID: 0x800444c6) \[     Active\]			  FlushPendingRHIBarriers

    (ID: 0x80d30428) \[     Active\]              slSetTag

Tried adding TdrDelay and TdrDiDelay into regedit, still crashed. Since dlfg.cpp is close source, it’s hard to do any debug, could you please help to support?

Spec
RTX 5090
Driver
596.21