Microsoft’s KB5127936 preview (dated 28 October 2026, builds 26300.9818 / 26200.9818 for Windows 11 26H2 / 25H2) lists an Audio fix: HDMI and DisplayPort audio playback might fail on certain AMD graphics cards.
This topic is about that AMD HDMI / DisplayPort fix, not about the still-open USB Audio Class 1.0 known issue (Code 10 / no output) on the same KB page — a different device class.
Confirmed points
- [Audio] item under normal rollout on KB5127936: addresses HDMI / DisplayPort audio playback that might fail on certain AMD graphics cards
- Non-security preview package dated 28 October 2026 for Windows 11 25H2 and 26H2
- Documented install path: Settings > Windows Update > Advanced options > Optional updates (per the KB)
- Starting with the October 2026 release, non-security preview updates are no longer aimed at Windows 11 24H2 the same way (Enterprise / Education continue monthly security updates)
No hands-on HDMI/DP audio lab test is claimed here. On a managed PC, ask IT before installing an optional update.
Sources
Question: have you lost HDMI or DisplayPort audio on an AMD graphics card, and did KB5127936 restore audio once deployed?