Periodic Stutter With Pre-Release

[LyingCak3]

Is there an existing issue for this?

• I have searched the existing issues

Is your issue described in the documentation?

• I have read the documentation

Is your issue present in the latest beta/pre-release?

This issue is present in the latest pre-release

Describe the Bug

Sunshine renderer frame rate drops from 60fps to around 20 fps for a few seconds before returning to normal. The issue appears to happen as the amount of "movement" on the host machine increases, but can happen while sitting idle. I believe it started after version v2025.113.133213-1 but I am not 100% on that.

Expected Behavior

Sunshine consistently renders smoothly.

Additional Context

Client is running Arch Linux 6.12.10-zen-surface (a merge of the linux surface and linux zen patch sets) and moonlight 6.1.0.
Host machine is on wired network to AP, client is connected with wireless 5G Wi-Fi.

Host Operating System

Linux

Operating System Version

Arch Linx 6.12.10-zen1-1-zen

Architecture

amd64/x86_64

Sunshine commit or version

v2025.130.210222

Package

Linux - pkg.tar.zst

GPU Type

NVIDIA

GPU Model

4070 SUPER

GPU Driver/Mesa Version

Nvidia Driver: 565.77 , Mesa version: 1:24.3.4-1

Capture Method

None

Config

key_rightalt_to_key_win = enabled
min_threads = 4
qp = 20
encoder = nvenc
min_log_level = 1

Apps

Relevant log output

---end data---
 [2025-01-30 20:44:18.877]: Debug: type [IDX_REQUEST_IDR_FRAME]
 [2025-01-30 20:44:18.888]: Debug: Frame 124011: IDR Keyframe (AV_FRAME_FLAG_KEY)
 [2025-01-30 20:44:19.005]: Debug: --begin relative mouse move packet--
 deltaX [-1]
 deltaY [0]
 --end relative mouse move packet--
 [2025-01-30 20:44:19.044]: Debug: type [IDX_REQUEST_IDR_FRAME]
 [2025-01-30 20:44:19.054]: Debug: Frame 124022: IDR Keyframe (AV_FRAME_FLAG_KEY)
 [2025-01-30 20:44:19.218]: Debug: type [IDX_REQUEST_IDR_FRAME]
 [2025-01-30 20:44:19.221]: Debug: Frame 124033: IDR Keyframe (AV_FRAME_FLAG_KEY)
 [2025-01-30 20:44:19.550]: Debug: type [IDX_REQUEST_IDR_FRAME]
 [2025-01-30 20:44:19.554]: Debug: Frame 124054: IDR Keyframe (AV_FRAME_FLAG_KEY)
 [2025-01-30 20:44:19.674]: Debug: type [Unknown] { 5502 }
 ---data---
 01001400000400050017000000E0FFDFFF92E40100
 ---end data---
 [2025-01-30 20:44:19.719]: Debug: type [IDX_REQUEST_IDR_FRAME]
 [2025-01-30 20:44:19.721]: Debug: Frame 124065: IDR Keyframe (AV_FRAME_FLAG_KEY)
 [2025-01-30 20:44:19.840]: Debug: type [Unknown] { 5502 }
 ---data---
 01001400001400050017000000240123019DE40100
 ---end data---
 [2025-01-30 20:44:21.423]: Debug: type [IDX_REQUEST_IDR_FRAME]
 [2025-01-30 20:44:21.423]: Debug: type [Unknown] { 5502 }
 ---data---
 01001400000400050017000000F009EF09EEE40100
 ---end data---
 [2025-01-30 20:44:21.424]: Debug: type [Unknown] { 5502 }
 ---data---
 01001402001500050017000300E10AE50AF6E40100
 ---end data---
 [2025-01-30 20:44:21.440]: Debug: Frame 124169: IDR Keyframe (AV_FRAME_FLAG_KEY)
 [2025-01-30 20:44:21.576]: Debug: type [IDX_REQUEST_IDR_FRAME]
 [2025-01-30 20:44:21.576]: Debug: type [IDX_REQUEST_IDR_FRAME]
 [2025-01-30 20:44:21.576]: Debug: type [Unknown] { 5502 }
 ---data---
 01001405001100050017000600900BAB0BFDE40100
 ---end data---
 [2025-01-30 20:44:21.576]: Debug: type [IDX_REQUEST_IDR_FRAME]
 [2025-01-30 20:44:21.589]: Debug: Frame 124179: IDR Keyframe (AV_FRAME_FLAG_KEY)
 [2025-01-30 20:44:21.591]: Debug: type [Unknown] { 5502 }
 ---data---
 010014000004000500170000001C0D1B0D0BE50100
 ---end data---
 [2025-01-30 20:44:21.743]: Debug: type [IDX_REQUEST_IDR_FRAME]
 [2025-01-30 20:44:21.756]: Debug: Frame 124190: IDR Keyframe (AV_FRAME_FLAG_KEY)
 [2025-01-30 20:44:21.909]: Debug: type [IDX_REQUEST_IDR_FRAME]
 [2025-01-30 20:44:21.923]: Debug: Frame 124201: IDR Keyframe (AV_FRAME_FLAG_KEY)
 [2025-01-30 20:44:22.208]: Debug: type [IDX_REQUEST_IDR_FRAME]
 [2025-01-30 20:44:22.223]: Debug: Frame 124220: IDR Keyframe (AV_FRAME_FLAG_KEY)
 [2025-01-30 20:44:22.422]: Debug: type [IDX_REQUEST_IDR_FRAME]
 [2025-01-30 20:44:22.434]: Debug: type [IDX_REQUEST_IDR_FRAME]
 [2025-01-30 20:44:22.439]: Debug: Frame 124234: IDR Keyframe (AV_FRAME_FLAG_KEY)
 [2025-01-30 20:44:27.335]: Debug: --begin keyboard packet--

[LyingCak3]

I tried the following to see if that resolved the issue but so far nothing has resolved the issue:

• X11 and wayland both show the issue
• Reverting to SDL2 instead of using SDL3->SDL2-compat library did not resolve
• Changing capture method did not resolve
• Changing encoder from NVENC to VA did not resolve