Describe the Bug

With channels > 1 in sunshine.conf, Sunshine is supposed to allow multiple devices to connect to the same stream. However, this appears to be currently broken on Windows. If one client is already in the stream, and then a second client joins, both clients show nothing but black after that. The Sunshine log is flooded with this message when this occurs:

[2023:01:17:03:52:37]: Error: Failed to acquire encoder mutex [0x887A0001]

This is a recent regression. I was able to fix the problem by reverting the following three commits in order: e2fce25, 00aa23b, and 0439d7a The reverts all apply cleanly to b2fe042, when done in the right order. The oldest of these commits is only about two weeks old, so this regression is very recent.

Operating System Version

Windows 11 21H2 (Build 22000.1455)

Architecture

64 bit

GPU Type

Nvidia

GPU Model

GeForce RTX 3090

GPU Driver/Mesa Version

GeForce Game Ready Driver 528.02