Machine Check Exception with kernels > 2.6.18 and Supermicro Board

[Ralf Gross <Ralf-Lists@ralfgross.de>]

Hi,

I'm running debian etch (amd64) on a Supermicro Server (Supermicro
Board X7DBE+, 16 GB RAM). Since upgrading to kernel 2.6.24 or 2.6.26
from the default etch kernel 2.6.18, I get Machine Check Exceptions.

HARDWARE ERROR
CPU 1: Machine Check Exception:   0 Bank 5: 1000001004000e0f
TSC 0
This is not a software problem!
Run through mcelog --ascii to decode and contact your hardware vendor
Kernel panic - not syncing: Machine check


With mcelog decoded error message:

HARDWARE ERROR. This is *NOT* a software problem!
Please contact your hardware vendor
CPU 1 BANK 5 MCG status:
MCi status:
Invalid log
BQ_DCU_READ_TYPE BQ_ERR_AERR2_TYPE BQ_ERR_AERR2_TYPE response parity error
STATUS 1000001004000e0f MCGSTATUS 0



Any idea if this really is a hardware problem (bus, cpu, ram...?), or maybe
caused by a faulty driver? Our hardware vendor told me that at least on windows
this could be caused by a bad driver.


TIA
Ralf

(Please CC me, because I'm not subscribed to the LKML, thanks!)



Hardware setup:

Supermicro X7DBE+
2x Xeon 5110
Intel 5000P Chipset
16 GB FB DDR2-RAM with ECC, PC667 

lspci output:

00:00.0 Host bridge: Intel Corporation 5000P Chipset Memory Controller Hub (rev b1)
00:02.0 PCI bridge: Intel Corporation 5000 Series Chipset PCI Express x8 Port 2-3 (rev b1)
00:04.0 PCI bridge: Intel Corporation 5000 Series Chipset PCI Express x8 Port 4-5 (rev b1)
00:06.0 PCI bridge: Intel Corporation 5000 Series Chipset PCI Express x8 Port 6-7 (rev b1)
00:08.0 System peripheral: Intel Corporation 5000 Series Chipset DMA Engine (rev b1)
00:10.0 Host bridge: Intel Corporation 5000 Series Chipset Error Reporting Registers (rev b1)
00:10.1 Host bridge: Intel Corporation 5000 Series Chipset Error Reporting Registers (rev b1)
00:10.2 Host bridge: Intel Corporation 5000 Series Chipset Error Reporting Registers (rev b1)
00:11.0 Host bridge: Intel Corporation 5000 Series Chipset Reserved Registers (rev b1)
00:13.0 Host bridge: Intel Corporation 5000 Series Chipset Reserved Registers (rev b1)
00:15.0 Host bridge: Intel Corporation 5000 Series Chipset FBD Registers (rev b1)
00:16.0 Host bridge: Intel Corporation 5000 Series Chipset FBD Registers (rev b1)
00:1c.0 PCI bridge: Intel Corporation 631xESB/632xESB/3100 Chipset PCI Express Root Port 1 (rev 09)
00:1d.0 USB Controller: Intel Corporation 631xESB/632xESB/3100 Chipset UHCI USB Controller #1 (rev 09)
00:1d.1 USB Controller: Intel Corporation 631xESB/632xESB/3100 Chipset UHCI USB Controller #2 (rev 09)
00:1d.2 USB Controller: Intel Corporation 631xESB/632xESB/3100 Chipset UHCI USB Controller #3 (rev 09)
00:1d.7 USB Controller: Intel Corporation 631xESB/632xESB/3100 Chipset EHCI USB2 Controller (rev 09)
00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev d9)
00:1f.0 ISA bridge: Intel Corporation 631xESB/632xESB/3100 Chipset LPC Interface Controller (rev 09)
00:1f.1 IDE interface: Intel Corporation 631xESB/632xESB IDE Controller (rev 09)
00:1f.2 SATA controller: Intel Corporation 631xESB/632xESB SATA Storage Controller AHCI (rev 09)
00:1f.3 SMBus: Intel Corporation 631xESB/632xESB/3100 Chipset SMBus Controller (rev 09)
01:00.0 PCI bridge: Intel Corporation 6311ESB/6321ESB PCI Express Upstream Port (rev 01)
01:00.3 PCI bridge: Intel Corporation 6311ESB/6321ESB PCI Express to PCI-X Bridge (rev 01)
02:00.0 PCI bridge: Intel Corporation 6311ESB/6321ESB PCI Express Downstream Port E1 (rev 01)
02:02.0 PCI bridge: Intel Corporation 6311ESB/6321ESB PCI Express Downstream Port E3 (rev 01)
03:00.0 PCI bridge: Intel Corporation 6700PXH PCI Express-to-PCI Bridge A (rev 09)
03:00.2 PCI bridge: Intel Corporation 6700PXH PCI Express-to-PCI Bridge B (rev 09)
05:01.0 Ethernet controller: Intel Corporation 82546GB Gigabit Ethernet Controller (rev 03)
05:01.1 Ethernet controller: Intel Corporation 82546GB Gigabit Ethernet Controller (rev 03)
06:00.0 Ethernet controller: Intel Corporation 631xESB/632xESB DPT LAN Controller Copper (rev 01)
06:00.1 Ethernet controller: Intel Corporation 631xESB/632xESB DPT LAN Controller Copper (rev 01)
07:01.0 Fibre Channel: QLogic Corp. QLA2422 Fibre Channel Adapter (rev 02)
0b:01.0 VGA compatible controller: ATI Technologies Inc ES1000 (rev 02)