U225X PUBLIC-SAFE CONVERSATION NOTE

RECORD: CHAT-0389
TOPIC: UHD Display Issue Fix
IMPORTED: 2026.04.06

This note was generated from a matching conversation in the supplied ChatGPT export.
EXTRACTED REQUEST: I enabled uhd on my headless display and now I can't get my samsung 85" tv to connect as my display. I tried restarting and it was fine until I logged in

RECOVERED CONVERSATION EXCERPTS
USER MESSAGES:
1. I enabled uhd on my headless display and now I can't get my samsung 85" tv to connect as my display. I tried restarting and it was fine until I logged in

ASSISTANT RESPONSES:
1. Yeah… this one’s pretty classic. You basically told Windows to push a signal your TV can’t (or won’t) accept during login, so it drops the display right when drivers kick in. Let’s walk it back fast and clean.. 💡 What’s happening - Boot screen = low resolution → works fine - Login hits = GPU switches to UHD / wrong refresh / HDR → TV says “nope” Common culprits: - 4K @ 120Hz when TV only likes 60Hz on that port - HDR forced on - Wrong color format (RGB vs YCbCr) - Resolution outside supported range. 🔧 FIX 1 (Quickest) — Force Safe Video Mode Do this with your keyboard on the headless: 1. Reboot the PC 2. As soon as Windows starts loading → hold power to interrupt it 3. Do this 2–3 times until you get: - *“Pr…

EXTRACTED KNOWLEDGE / HOW-TO
- Let’s walk it back fast and clean.
- --
- Boot screen = low resolution → works fine
- Login hits = GPU switches to UHD / wrong refresh / HDR → TV says “nope”
- 4K @ 120Hz when TV only likes 60Hz on that port
- HDR forced on
- Wrong color format (RGB vs YCbCr)
- Resolution outside supported range
CONVERSATION SHAPE: 1 user turns / 1 assistant turns
ATTACHMENTS DETECTED: 1

Raw transcripts, private details, exact locations, account information, employer/customer-confidential material, and restricted software references are not published in this note.
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