Xpra: Ticket #1763: nvfbc cuda regression: picture does not update

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:

#365 keep buffer on GPU
#1317 NVFBC
#1597 GPU buffer processing

Mon, 05 Feb 2018 03:47:17 GMT - Antoine Martin: status, description changed

status changed from new to assigned

description modified (diff)

Mon, 05 Feb 2018 04:22:59 GMT - 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?

Sat, 28 Apr 2018 17:51:04 GMT - Antoine Martin:

win32 fixed in r19103: we no longer push + pop the cuda context and just keep it live until we close it

r19104 re-enables cuda by default

Sun, 29 Apr 2018 06:17:48 GMT - Antoine Martin: status changed; resolution set

status changed from assigned to closed

resolution set to fixed

Linux was not affected.

Sat, 23 Jan 2021 05:33:08 GMT - migration script: