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Opened 3 weeks ago

Last modified 3 weeks ago

#1763 assigned defect

nvfbc cuda regression: picture does not update

Reported by: Antoine Martin Owned by: Antoine Martin
Priority: major Milestone: 2.3
Component: encodings Version: 2.2.x
Keywords: Cc:

Description (last modified by Antoine Martin)

Problem spotted on win32, may also affect Linux (TBC).

The code runs and it looks like we're downloading the frames from video memory, but when scrolling detection runs it finds that the picture has not changed and so we end up not generating any screen updates.

Forcing scrolling detection off does not help: the video encoders also find the picture unchanged. This also applies to the NVENC encoder when using the picture data found in the CUDA buffer which would indicate that the API is just not capturing new data. (rather than a download / usage problem on our side)
This could be a driver bug, or a problem with the API uncovered by newer drivers.

Related tickets:

Change History (2)

comment:1 Changed 3 weeks ago by Antoine Martin

Description: modified (diff)
Status: newassigned

comment:2 Changed 3 weeks ago by Antoine Martin

r18299: CUDA buffer mode no longer enabled by default

TODO:

  • check linux (move graphics cards around... sigh)
  • fix + backports if needed
  • also backport r18300?
Last edited 3 weeks ago by Antoine Martin (previous) (diff)
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