Missing decode definitions for Product ID 0x003: PMC rev 1, reason 0x32 (Cannon Lake PCH / Coffee Lake, Dell OptiPlex XE3)

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#114 opened on Oct 8, 2026 0 comments 0 reactions 0 assignees View on GitHub

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Assessment

Difficulty: 2/5
Estimated time: 1-3 hours
Newbie friendliness: 65/100

Issue type: Feature
Clarity: Mostly clear
Activity status: Active
Tech stack: rust
Domain: devtools

Research direction

Examine how Product ID 0x00c was added in issues #90/#91, particularly the decode-defs/PMC/1/layout.csv and target_info.json files. Create equivalent definitions for Product ID 0x003 using the provided hex dump to identify field offsets and meanings. Verify the decoder correctly parses the sample record and run the project's test suite.

Written by the indexing model from the issue text.

Description

Summary

I am debugging recurring hard platform freezes on a Dell OptiPlex XE3 (Coffee Lake desktop, Cannon Lake PCH). After each freeze, the BIOS (EDK2-based) publishes an ACPI BERT containing what appears to be a legacy-format Intel Crash Log record with Product ID 0x003, record type PMC, revision 1, in a Firmware Error Record Reference wrapper of type 1 / revision 0.

There is no public collateral for Product ID 0x003, and iclg v1.2.0 does not reach the record at all because the revision-0 FER wrapper carries no payload GUID (see "iclg behavior" below). I decoded the headers manually using the intel_crashlog library source as a reference.

Could Intel confirm the product mapping, provide the decode definitions, and help interpret reason 0x32?

Hardware / platform

System: Dell OptiPlex XE3, BIOS 1.38.0 (2025-09-04, latest; confirmed current via LVFS)
CPU: Intel Core i5-8500 (Coffee Lake), microcode 0xf8 at the time of the captured crashes
PCH: Intel Q370 (Cannon Lake PCH-H), CSME firmware 12.0.97.3000
Memory: 4x8 GB DDR4, non-ECC
OS: Proxmox VE (Debian 12), kernel 6.8.12 at the time of the captured crashes
BERT captured from Linux sysfs (/sys/firmware/acpi/tables/data/BERT, 3196 bytes, Generic Error Status Block) on the boot following each freeze

Failure history

Four complete platform freezes since 2026-09-24 (BERT captured for the last three: 2026-09-30, 2026-10-06, 2026-10-07). In each case:

The system hangs completely with no kernel messages; hardlockup_panic=1 was armed and efi_pstore remained empty, so the hang appears to occur below the OS.
The iTCO/TCO watchdog initiates a host partition reset (HPR_CAUSE0 = 0x00000040).
The host reset apparently does not complete, and PMC firmware escalates to a global reset. PWRM GBLRST_CAUSE0 = 0x00000400, GBLRST_CAUSE1 = 0x00010001 (HOST_RESET_TIMEOUT plus bit 16), read after reboot.

Manually decoded record

CPER structure in the BERT data: GESB (severity 1, data length 0xc68) -> one Generic Error Data Entry (section type 81212a96-09ed-4996-9471-8d729c8e69ed, Firmware Error Record Reference, revision 0x300, error data length 0xc20) -> FER header at 0x5c with error_type = 0x01, revision = 0x00 (so 16-byte header, no GUID).

The Crash Log record starts at file offset 0x7c:

Field	Value	Notes
version._value	0x01003001
record_type	0x1 (PMC)
product_id	0x003
header_type	0x0
revision	0x1
dword 1	0x00000006	record size field?
dwords 2-3	0x426b27b5, 0x00000ba4	timestamp?
dword 4	0x00000002	agent_version?
dword 5	0x00000032	reason, if the Type2-like layout applies

I am reading dwords 2-5 against the Type2 header layout (timestamp at +8, agent_version at +16, reason at +20) since the modern Type0 has no such fields; corrections welcome.

All three captured records are nearly identical: 24 of 799 dwords differ across the three crashes, and most of those look like timestamps/counters. The presumed reason value 0x32 is byte-identical in all three. The 2026-09-30 crash (which was preceded by ~20 h of e1000e "Unit Hang" messages) differs from the two October crashes in a handful of bits (file offsets 0x9c, 0xac, 0xbc, 0x49c); the two October crashes (no NIC symptoms) are identical at those offsets.

iclg behavior

Two separate aspects:

No collateral exists for Product ID 0x003, so even with parsing the result would be header-only decode (as in #90, #99, #113).
Region::from_cper_section() only accepts a FirmwareErrorRecord whose header GUID equals RECORD_ID_CRASHLOG (8f87f311-c998-4d9e-a0c4-6065518c4f6d). A revision-0 FER header has no GUID field, so legacy records like this one are ignored. Is support for the legacy type-1/rev-0 wrapper planned?

Questions for Intel

Which platform/PCH/agent does Crash Log Product ID 0x003 map to? (Cannon Lake PCH-H / CSME 12 era?)
Could you publish or provide the decode definitions for this product (decode-defs/PMC/1/layout.csv equivalent and target_info.json), as was done for Product ID 0x00c in #90/#91?
What does PMC reason 0x32 mean for this product? Specifically: is it a collection trigger/reset category (e.g. a watchdog or host-reset-timeout escalation path), or does it point at a specific failure domain? Given the reset-cause registers above, what conclusions would be justified or unjustified from the reason alone?
Can the PMC payload for this product distinguish between e.g. a stuck fabric/memory transaction, a core retirement timeout, a thermal/power event, or a PCH-internal failure? Even a coarse answer would direct the ongoing hardware isolation (memory vs. power delivery).

Data

A trimmed hexdump of the 2026-10-06 record follows (zeros/0xff padding elided). The full 3196-byte binaries from all three crashes are retained and can be attached on request.

BERT data, 2026-10-06 crash, offsets 0x000-0x590

00000000  00 00 00 00 00 00 00 00 00 00 00 00 68 0c 00 00
00000010  01 00 00 00 96 2a 21 81 ed 09 96 49 94 71 8d 72
00000020  9c 8e 69 ed 01 00 00 00 00 03 00 00 20 0c 00 00
00000030  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00000040  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00000050  00 00 00 00 00 00 00 00 00 00 00 00 01 00 00 00
00000060  00 00 00 00 00 00 00 00 01 30 00 01 00 00 00 00
00000070  00 00 00 00 00 00 00 00 00 00 00 00 01 30 00 01
00000080  06 00 00 00 b5 27 6b 42 a4 0b 00 00 02 00 00 00
00000090  32 00 00 00 29 00 19 09 ff 07 00 80 80 24 00 02
000000a0  03 be 05 7f 01 00 00 00 00 00 01 00 07 00 00 22
000000b0  01 00 20 01 31 20 00 80 00 61 00 00 00 04 00 01
000000c0  00 40 00 c7 04 ff 2f ff 8b f0 01 ef 73 68 0e 75
000000d0  00 20 02 9a 00 00 11 00 00 00 00 00 00 00 00 04
000000e0  00 00 00 00 81 08 50 00 1a cf 0e 00 00 5d 03 00
000000f0  01 00 00 00 70 f1 f3 5b 3c 00 20 10 86 00 00 00
00000100  00 f9 f3 7f bc 17 37 de 87 7e 47 ff ff f9 f3 7d
00000110  00 10 32 18 87 78 41 03 1e f1 f3 5b 3c 00 00 10
00000120  86 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00000130  00 20 00 d4 bc 1c 24 08 04 10 00 00 00 06 0c 00
00000140  43 00 c8 21 78 80 b8 00 00 18 00 08 00 00 00 00
00000150  80 66 41 03 00 00 00 00 00 00 00 00 80 10 00 00
00000160  00 42 00 00 00 00 00 00 00 b8 14 00 02 00 00 00
00000170  09 00 00 00 80 00 00 00 00 8f 81 48 08 00 3f 80
00000180  03 70 7e b2 f7 ff c0 7f fc 8f 81 48 08 00 3f 80
00000190  03 90 22 00 00 00 01 00 00 00 01 00 00 00 01 00
000001a0  00 00 01 00 00 00 01 00 00 00 01 00 00 00 01 00
000001b0  00 00 01 ff 0f 00 00 ff 0f 00 00 ff 0f 00 00 ff
000001c0  0f 00 00 ff 0f 00 00 ff 0f 00 00 ff 0f 00 00 ff
000001d0  0f 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
000001e0  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
000001f0  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00000200  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00000210  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00000220  00 00 00 00 00 00 00 00 00 00 00 72 01 00 34 72
00000230  01 00 04 72 01 00 04 72 01 00 04 72 01 00 34 72
00000240  01 00 04 72 01 00 04 72 01 00 04 00 00 00 00 00
00000250  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00000260  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00000270  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00000280  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00000290  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
000002a0  00 00 00 00 1f 00 00 00 1f 00 00 00 1f 00 00 00
000002b0  1f 00 00 00 1f 00 00 00 1f 00 00 00 1f 00 00 00
000002c0  1f 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
000002d0  00 00 00 00 00 00 00 00 00 00 00 00 00 00 01 00
000002e0  00 00 01 00 00 00 01 00 00 00 01 00 00 00 01 00
000002f0  00 00 01 00 00 00 01 00 00 00 01 ff 0f 00 00 ff
00000300  0f 00 00 ff 0f 00 00 ff 0f 00 00 ff 0f 00 00 ff
00000310  0f 00 00 ff 0f 00 00 ff 0f 00 00 00 00 00 00 00
00000320  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00000330  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00000340  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00000350  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00000360  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00000370  00 00 00 72 01 00 34 72 01 00 04 72 01 00 04 72
00000380  01 00 04 72 01 00 34 72 01 00 04 72 01 00 04 72
00000390  01 00 04 00 00 00 00 00 00 00 00 00 00 00 00 00
000003a0  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
000003b0  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
000003c0  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
000003d0  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
000003e0  00 00 00 00 00 00 00 00 00 00 00 00 1f 00 00 00
000003f0  1f 00 00 00 1f 00 00 00 1f 00 00 00 1f 00 00 00
00000400  1f 00 00 00 1f 00 00 00 1f 00 00 00 00 00 00 00
00000410  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00000420  00 00 00 ca fc 18 40 00 00 00 01 00 00 00 01 00
00000430  00 00 01 00 00 00 01 00 00 00 01 00 00 00 01 00
00000440  00 00 01 c9 0c 9b 00 ff 0f 00 00 ff 0f 00 00 ff
00000450  0f 00 00 ff 0f 00 00 ff 0f 00 00 ff 0f 00 00 ff
00000460  0f 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00000470  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00000480  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00000490  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
000004a0  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
000004b0  00 00 00 00 00 00 00 00 00 00 00 72 01 00 30 72
000004c0  01 00 04 72 01 00 04 72 01 00 04 72 01 00 34 72
000004d0  01 00 04 72 01 00 04 72 01 00 04 00 01 00 00 00
000004e0  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
000004f0  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00000500  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00000510  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00000520  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00000530  00 00 00 00 1f 00 00 00 1f 00 00 00 1f 00 00 00
00000540  1f 00 00 00 1f 00 00 00 1f 00 00 00 1f 00 00 00
00000550  1f 00 00 01 00 00 00 00 00 00 00 00 00 00 00 00
00000560  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00000570  00 00 00 00 00 00 29 07 18 3c 43 00 03 01 c9 de
00000580  0e 0a 00 ff 89 3c 5f 01 00 30 00 39 00 00 00 00
00000590  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

No serial numbers or machine identifiers are included. Thank you.

Dominant language: Rust
Stars: 11
Forks: 6
Avg merge: 1h 47m
Merged PRs (30d): 3

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More Rust issues

Missing decode definitions for Product ID 0x003: PMC rev 1, reason 0x32 (Cannon Lake PCH / Coffee Lake, Dell OptiPlex XE3)

Is something wrong?

Assessment

Research direction

Description

Summary

Hardware / platform

Failure history

Manually decoded record

iclg behavior

Questions for Intel

Data

Getting set up

First steps

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