{
  "schema": "hsimc.t736.hdmi.physical-output.c0-010.v1",
  "artifact": "HRI-HSIMC-T736-AIS-B-HDMI-PHYSICAL-OUTPUT-EPERSON-WORK-CASE-C0-010-20261011",
  "release": "C0-010",
  "date": "2026-10-11",
  "url": "https://hsimc.tech/rd/t736/ecosystem/evidence/ais-hk2-hdmi-physical-output/",
  "product_scope": "ONE_AIS_EQUIPPED_HELPERBOARD_T736_UBUNTU_EXPERIMENTAL_REFERENCE",
  "category": "HUMAN_SUPERVISED_AI_ASSISTED_HARDWARE_ENGINEERING_WORK_CASE",
  "first_failure": {
    "initial_observation": "HDMI connector physically present, Ubuntu output absent",
    "running_MIPI_DSI_DTB": "HDMI disabled / DSI enabled / 720x1280",
    "reason": "Original firmware chose MIPI display route; not proof of HDMI hardware defect"
  },
  "supplier_evidence": {
    "board_manual_photo": "Physical HDMI output connector identified in vendor board manual",
    "board_hardware": "Supplier reference-board schematic showed HDMI TX/DDC/HPD signal design",
    "firmware_image_variants": "Vendor Ubuntu Qt HDMI 1920x1080 and MIPI 720x1280, both intact per supplied MD5",
    "vendor_MIPI_LINUX_DTB": "Byte-identical to actual original boot partition embedded DTB",
    "vendor_HDMI_LINUX_DTB": "Physical HDMI0 status okay and DSI status disabled; original MIPI opposite",
    "vendor_Uboot_DTB": "HDMI route present; separately inspected and left untouched",
    "vendor_kernel_source": "Restricted vendor BSP confirmed HDMI FC/TCON internal pattern method and pattern cleanup",
    "restricted_source_files_published": false
  },
  "work_execution": {
    "original_boot_partitions": "Read-only backups with device-vs-Mac SHA256 evidence",
    "boot_candidate": "Original Ubuntu kernel and ramdisk preserved; only 3 Linux FDT status properties changed",
    "authorized_write": "ONE guarded 64 MiB /dev/sda3 write, full SHA256 readback PASS",
    "authorized_reboot": "ONE real reboot; new Boot ID and SSH PASS",
    "connector": "card0-HDMI-A-1 connected after HPD",
    "edid": "256 bytes, both checksums PASS",
    "supported_modes": [
      "1920x1080@60",
      "2560x1440@60"
    ],
    "modetest_KMS": "1920x1080@60 DRM mode set accepted; framebuffer/primary plane bound",
    "standalone_modetest_visual_result": "NO_VISIBLE_PICTURE_OPERATOR_REPORTED",
    "TCON_HDMIFC_vendor_pattern_sequence": [
      "TCON color bars 15 sec",
      "HDMI internal red 15 sec",
      "HDMI internal blue 15 sec"
    ],
    "pattern_script_rc": 0,
    "pattern_cleanup": "pattern=0 invoked and acknowledged; no reboot or new flash",
    "human_report": "SUCCESS_OPERATOR_REPORTED_FOR_THREE_PHASE_SESSION",
    "individual_A_B_C_visual_receipts": "NOT_INDEPENDENTLY_ITEMIZED_OR_VIDEO_CAPTURED"
  },
  "outstanding": {
    "regular_Ubuntu_Xorg_LightDM": "FAIL_XORG_SEGFAULT",
    "generic_framebuffer_desktop": "NOT_ACCEPTED",
    "unattended_boot_NPU_autorecovery": "FAILED_PREVIOUS_C0_009",
    "WD4TB_boot_automount": "UNRESOLVED_RW_AUTOMOUNT_AFTER_REBOOT",
    "HDMI_HPD_connection_stability": "NEEDS_LONGER_OBSERVATION",
    "production_grade_or_all_T736_supplier_models": "NOT_CLAIMED",
    "public_hosted_MCP_execution": "NOT_DEPLOYED"
  },
  "e_person_lesson": {
    "demonstrated": "Human-supervised AI-assisted engineering can transform supplier archives, local device observations and authorization into traceable physical outcomes",
    "human_authority": "Operator explicitly authorized bounded boot write and reboot, operated physical cabling, and reported visual outcome",
    "not_demonstrated": "An independently deployed autonomous e-Person or unattended physical device execution",
    "reusable_process": "Source→Compare→Bounded change→Operator approve→Execute→Readback→Human observe→Publish with evidence"
  },
  "evidence_ranking": {
    "source_mirror": "PRIVATE_VENDOR_REFERENCE_NOT_COPIED",
    "byte_integrity": "MAC_AND_DEVICE_SHA256_VERIFIED",
    "DRM_KMS": "MACHINE_OBSERVED",
    "human_picture": "OPERATOR_ATTESTED_NOT_PHOTOGRAPHICALLY_VERIFIED",
    "production_acceptance": "NOT_ACCEPTED"
  },
  "private_raw_source_digests": {
    "user_operator_report_SHA256": "a07086de13650e2e851d849082e53a02984c353e2c1ec415bc9b0cb9d44fe8db",
    "single_pattern_test_log_SHA256": "875d9246dc9788ee18cc9ca8f71fd47400fe489a8fc2e5c942fbdbfc87246ef9",
    "original_vendor_pattern_handler_excerpt_SHA256": "4696a2fdd2d876f8af16361f00223764043a786de9eb9513e55e73e60b1b34dd",
    "supplier_offline_firmware_FDT_diff_SHA256": "78997b95ec87a4d9485333f35b17d3ecd43bb8b0e7e349c0e0fb216f9aea2d88",
    "active_hk2_vs_vendor_FDT_diff_SHA256": "f5a7084c92ee815d2a779427b30bcacb26f722771e754df0c08522db78226b0f",
    "exact_3_status_linux_boot_offline_candidate_SHA256": "5c92353f54e15d59724628c22a853a93719a1ff16a6eb13f9e3ee0f637352f69",
    "human_operator_write_once_readback_SHA256": "c2c1360e341241bc0a89e970068280afb84268c144db632c0ff1fb6b87662ee2",
    "human_operator_reboot_real_new_boot_SHA256": "543d3d7bc7fdd8159f31ed936aa7381857e8feaacc1c34cd4342bf3a8f4800b8",
    "HDMI_EDID_256_bytes_parse_SHA256": "49e776ef2d4ea5146a3b0325f25e772389e6cbc2dcfabb070a4e3c29e273c2d1",
    "DRM_direct_60s_negative_visual_and_pattern_preparation_SHA256": "165afb4b6f933068221497193fc746d519070b5b0e92d35789b3221bf9843ab3",
    "previous_C0_009_suppliers_evaluation_SHA256": "660fc87ac961bdce6ffcc1911dbe15dc472d88e74972519b8f90434d8a944803"
  },
  "contains_secret_or_raw_proprietary_files": false,
  "C0_009_history_is_preserved": true
}