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U225X / ENGINEERING UNWARRANTED

UHD Display Issue Fix

Public record / CHAT-0389 / Revision EXPORT-03

PUBLIC RECORD
U225X

A conversation-specific public summary of uhd display issue fix, distilled from the supplied export. The detailed excerpts remain available in the released note file.

STATUSRECOVERED / SPECIFIC NOTECLASSIFICATIONSYSMATERIALCHAT EXPORT / BUILD & TOOLSDATE2026.04.06

TECHNICAL NOTES

Conversation-specific knowledge extracted from the uhd display issue fix discussion.

EXTRACTED KNOWLEDGE / HOW-TO FROM CONVERSATION

QUESTION / CONTEXT: 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

  1. Let’s walk it back fast and clean.
  2. --
  3. Boot screen = low resolution → works fine
  4. Login hits = GPU switches to UHD / wrong refresh / HDR → TV says “nope”
  5. 4K @ 120Hz when TV only likes 60Hz on that port
  6. HDR forced on
  7. Wrong color format (RGB vs YCbCr)
  8. Resolution outside supported range

SPECIFICATION

SourceSupplied ChatGPT export
CategoryBuild & Tools
Conversation1 user turns / 1 assistant turns
Attachments1 references detected
Public detailExtracted knowledge + excerpts

DEVELOPMENT HISTORY

2026.04.06EXPORT-04Matched to the supplied export; key guidance is surfaced separately and the raw transcript remains unpublished.