claudetools/clients/dataforth/session-logs/2026-06/2026-06-25-howard-dforth-ship-tdr-bsod.md

User

• User: Howard Enos (howard)
• Machine: Howard-Home
• Role: tech

Session Summary

Investigated a reported BSOD on the Dataforth shipping-station PC DFORTH-Ship: stop code 0x00000116 VIDEO_TDR_FAILURE. Resolved the agent via /rmm-search (exact match DFORTH-Ship, id db17e069-2948-4cbc-97ea-1da721edcaf5, Dataforth Corp / site D1, online), distinguishing it from a near-twin host DForth-Shipp.

Ran two read-only PowerShell diagnostics over GuruRMM. The first pulled GPU/driver inventory, recent bugcheck/Kernel-Power events, display/TDR driver events, WHEA, and the minidump list. The GPU is an integrated Intel HD Graphics 4600 on driver 20.19.15.5126 (1/20/2020 — Intel's final driver for that part). The latest crash (6/24/2026 04:36) was confirmed 0x116 with arg3 0xc0000001 (GPU reset did not complete in the 2s TDR window). Five minidumps exist spanning 11/3/2025 -> 5/3 -> 5/20 -> 6/16 -> 6/24/2026, an accelerating cadence.

The second diagnostic confirmed the System event log had rolled (only the latest 1001 bugcheck survives in events, though dump files persist), that TdrDelay/TdrLevel are at defaults, that Edge

• WebView2 (hardware-accelerated) are installed, and that the hardware is an HP EliteDesk 800 G1 USDT with a Dec-2014 BIOS (~11.5-year-old ultra-slim chassis, heat/dust prone).

Diagnosis: display-driver TDR on aging integrated graphics; because it is integrated there is no card to reseat/swap. Recommended PC replacement as the real fix with interim mitigations. Per Howard's go-ahead, applied mitigation #1: disabled Edge hardware acceleration via machine policy (HKLM\SOFTWARE\Policies\Microsoft\Edge\HardwareAccelerationModeEnabled = 0), verified value = 0, exit 0. Posted the required [RMM] write alert to #dev-alerts.

Key Decisions

• Targeted the exact host DFORTH-Ship over the near-twin DForth-Shipp to avoid acting on the wrong Dataforth machine.
• Classified the crash as a TDR on integrated graphics, so ruled out "reseat/replace the GPU" advice — the GPU is on the CPU/motherboard.
• Chose disabling Edge hardware acceleration as the first mitigation: it is the most common software TDR trigger on HD 4600, low-risk, reversible, and offers no downside on a shipping PC.
• Held off on the TdrDelay registry band-aid; it masks marginal timeouts and would not save a genuine hardware fault. Flagged thermal cleaning + PC replacement as the durable path given the accelerating dump cadence on an 11.5-year-old slim desktop.

Problems Encountered

• Full bugcheck-code history was unavailable from the event log (System log had rolled; only the 6/24 1001 event remained). Worked around by enumerating the persisted .dmp files to establish the crash cadence; older signatures left unconfirmed (would require loading the dumps).

Configuration Changes

• DFORTH-Ship registry (via RMM): created/set HKLM\SOFTWARE\Policies\Microsoft\Edge value HardwareAccelerationModeEnabled (DWORD) = 0. Reversible (delete value or set to 1). Effective on next Edge restart.
• No files modified in the repo.

Credentials & Secrets

None discovered or created this session. RMM auth via existing vault path infrastructure/gururmm-server.sops.yaml.

Infrastructure & Servers

• Host: DFORTH-Ship — GuruRMM agent id db17e069-2948-4cbc-97ea-1da721edcaf5, Dataforth Corp, site D1, Windows, online.
• Hardware: HP EliteDesk 800 G1 USDT, BIOS release 12/10/2014. GPU: Intel HD Graphics 4600, driver 20.19.15.5126 (2020-01-20). Logged-on console user: shipping.
• Near-twin host (not touched): DForth-Shipp, id 95991b45-d843-4586-8275-9996d0d9ae17.
• GuruRMM API: http://172.16.3.30:3001

Commands & Outputs

• Latest bugcheck: 0x00000116 (0xffff850c0cc03010, 0xfffff80646d91b10, 0xffffffffc0000001, 0x0000000000000003) at 6/24/2026 04:36, dump C:\WINDOWS\Minidump\062426-8953-01.dmp.
• Minidumps present: 110325-8265-01, 050326-7921-01, 052026-7937-01, 061626-7687-01, 062426-8953-01.
• Mitigation verify output: Set HardwareAccelerationModeEnabled = 0 (0 = disabled), exit 0 (cmd b98d56ba-065b-431b-b976-783d5902d80d).
• Diagnostic cmd ids: b666b53b-... (GPU/events/dumps), f562d01f-... (history/TDR/model).

Pending / Incomplete Tasks

• Have on-site staff fully restart Edge (or reboot) so the HW-accel policy takes effect; verify at edge://policy and edge://settings/system.
• Monitor for recurrence. If it bugchecks again, pull and analyze the four older dump signatures to confirm whether it is drifting toward a hard hardware fault.
• Schedule thermal cleaning of the USDT chassis/fan (on-site).
• Recommend/plan replacement of the 11.5-year-old EliteDesk 800 G1 USDT shipping station.

Reference Information

• Stop code: 0x00000116 VIDEO_TDR_FAILURE (Timeout Detection & Recovery; default TdrDelay 2s).
• TDR registry: HKLM\SYSTEM\CurrentControlSet\Control\GraphicsDrivers (TdrDelay/TdrLevel — at defaults on this host).
• Edge policy: HKLM\SOFTWARE\Policies\Microsoft\Edge\HardwareAccelerationModeEnabled.
• #dev-alerts message id: 1519768574304980993.