{
  "schema": "hsimc.t736.ubuntu-hdmi.desktop-recovery.c0-011.v1",
  "artifact": "HRI-HSIMC-T736-AIS-B-UBUNTU-HDMI-INTERACTIVE-1080P-BOOT-RECOVERY-C0-011-20261012",
  "edition": "C0-011",
  "date": "2026-10-12",
  "url": "https://hsimc.tech/rd/t736/ecosystem/evidence/ais-hk2-ubuntu-hdmi-desktop/",
  "scope": "one AIS-equipped Allwinner T736 experimental board, Ubuntu 24.04, Xubuntu/XFCE",
  "advance_from": {
    "previous_release": "C0-010",
    "C0_010_evidence": "Operator-attested TCON/HDMI internal patterns; normal Xorg desktop had failed",
    "this_release": "Recovered full interactive 1920x1080 Ubuntu graphical desktop, with separate new-boot automatic service + operator visual confirmation"
  },
  "cause_isolation": {
    "fail_in": "Xorg 1.21 modesetting DRM connector RandR property initialization",
    "evidence": "GDB SIGSEGV inside modesetting_drv.so when dereferencing NULL property atoms",
    "drm_property_type": "BITMASK",
    "relevant_properties": [
      "pixelformat_support",
      "dynamicrange_support"
    ],
    "temporary_fix": "Scoped LD_PRELOAD filter excludes the two unsupported connector properties from Xorg's libdrm view",
    "core_Xorg_binary_modified": false,
    "vendor_Xorg_configuration_modified": false,
    "kernel_DTB_reflashed_in_D003": false
  },
  "actual_interactive_first_acceptance": {
    "operator_report": "1920x1080 Xubuntu desktop visible; mouse and keyboard both operational; Thunar file manager open",
    "operator_photo_on_private_chat": "IMG_1786.jpg; SHA256 a9b0719567f3162b318bc6cb7d29aa1b846fc04a887923c48174ee48e841dcdd; not republished as image",
    "Xorg_Xrandr": "HDMI-1 connected primary 1920x1080 at 60 Hz",
    "LightDM_7s": "active / success",
    "LightDM_27s": "active / success",
    "Xfce_processes": [
      "xfce4-session",
      "xfce4-panel",
      "xfdesktop"
    ],
    "human_picture_grade": "OPERATOR_CONFIRMED_AND_PHOTO_PROVIDED"
  },
  "actual_new_boot": {
    "new_boot_id_recorded": "distinct from original operator's first successful Boot ID",
    "LightDM_auto_start": "Started by systemd approximately 6.9 sec into new Boot",
    "PAM_autologin": "Xubuntu session opened approximately 8.3 sec into new Boot",
    "independent_runtime": "LightDM / Xorg / XFCE and HDMI-1 connected+enabled survived several minutes, 1920x1080 60Hz",
    "Xorg_shim_loaded_in_process": "verified by root-read Xorg process memory map",
    "operator_explicit_confirmation": "Device was rebooted; HDMI Xubuntu desktop recovered visibly after this reboot",
    "assistant_executed_reboot": false,
    "cold_power_loss_test": false,
    "production_unattended_reliability": false
  },
  "change_boundary": {
    "installed_components": [
      "isolated Xorg-process scoped compatibility library",
      "LightDM xserver-command override for existing Xorg",
      "LightDM autologin session corrected to existing Xubuntu"
    ],
    "rollback": "Exact original LightDM files and driver state backed up; removal of additive drop-in and restoration procedure preserved privately",
    "original_boot_partition": "unchanged from pre-D003 HDMI-enabled 64 MiB image",
    "original_kernel_and_Xorg_binary": "not replaced",
    "existing_Xorg_vendor_config": "SHA256 unchanged"
  },
  "outstanding": {
    "2560x1440_2K_mode": "separate next experiment; use monitor supporting requested mode, not presumed from current 1080p EDID",
    "USB_external_WD_4TB": "both partitions currently autowired RW after boot; no file system or mount-policy fix claimed",
    "NPU_boot_auto_restore": "known disabled failing service remains independent",
    "MCP_capabilities_new_boot": "not re-accepted in this work",
    "long_term_display_runtime": "not established",
    "cold_powerloss_recovery": "not assessed",
    "product_readiness": "NOT_ESTABLISHED"
  },
  "e_person_public_significance": {
    "demonstrated": "Human-supervised AI engineering developed a traceable hardware-level repair through existing supplier documents, local source, narrow operating authority and readback evidence",
    "physical_completion": "Normal usable desktop after a real reboot, not just a pattern generator demonstration",
    "human_authority": "Human authorized critical actions and visually verified keyboard/mouse and reboot persistence",
    "not_demonstrated": "independently autonomous public e-Person that can modify arbitrary devices or transfer authority across boards"
  },
  "grade": {
    "machine": "Original private board logs and SHA256 receipts; new Boot automatic LightDM and Xorg process verified",
    "human": "Operator photo on first acceptance and subsequent explicit reboot + picture confirmation",
    "public": "Sanitized summary with source hashes, no secrets, vendor source binaries or private screenshot"
  },
  "source_SHA256_private": {
    "D0_003_ACCEPTANCE": "bb9254596d54ca50cb4659c93744025c80175866f9b90d2964ec558264907f3d",
    "NEW_BOOT_MACHINE_READBACK": "07e4662b20ceb1b4f7dd780d423edd4ff53e7ca6918929804448eee31f01a836",
    "INDEPENDENT_AFTER_REBOOT_RANDR": "abc3bdccd2269b2f47f439485bfa03948b9c5941424eab57d2948a2c6934add7",
    "OPERATOR_FIRST_SUCCESS_LOG": "20c9260aadcb8e66a7d64046d48f09248f8d9d0a75344bcd33ba6e405a7d2302",
    "OPERATOR_POSTCHECK": "5f521dbbf035aff983e528c64ef497a6e45ee081ac1240a23e58d48d4b16a0bf",
    "GDB_NULL_POINTER_PROPERTIES": "4f1da182e858007e15eef8fab466a87fed37c47db5a8b6d057cddddd6cf2f40e",
    "RUNTIME_SHIM_SOURCE": "18372666f6815b3d68d2c8b502961c641c7b8a053c235305572f0c1a0d879010",
    "RUNTIME_SHIM_BINARY": "6372f160ee925e327da863395c8647dff03f4d77d424bbcc1630de1c3d3cc052",
    "USER_EXPLICIT_BOOT_AND_PICTURE_CONFIRMATION": "11b067c675b693ac1f9db64580c630287621932a6040250e22c2d8bcb9addf4f",
    "PREVIOUS_C0_010_PUBLIC_EVIDENCE": "e4a906ae7a5f57d226fd0fdd6a52f628e32fab917a8337b4beab1f89946d7b37"
  },
  "public_private_snapshot_copied": false
}