System Event Log Troubleshooting Guide for Intel® S5500/S3420

System Event Log Troubleshooting Guide for Intel

®

Chassis Subsystem

10.2 FP (NMI) Interrupt

The front panel interrupt button (also referred to as NMI button) is a recessed button on the front panel that allows the user to force a critical interrupt which causes a crash error or kernel panic.

Table 74: FP (NMI) Interrupt Sensor Typical Characteristics

Byte Field

11 Sensor Type

12 Sensor Number

13 Event Direction and

Event Type

14 Event Data 1

Description

13h = Critical Interrupt

05h

[7] Event direction

0b = Assertion Event

1b = Deassertion Event

[6:0] Event Type = 6Fh (Sensor Specific)

[7:6] – 00b = Unspecified Event Data 2

[5:4] – 00b = Unspecified Event Data 3

[3:0] – Event Trigger Offset = 0

Not used

Not used

15 Event Data 2

16 Event Data 3

10.2.1 FP (NMI) Interrupt – Next Steps

The purpose of this button is for diagnosing software issues – when a critical interrupt is generated the OS typically saves a memory dump.

This allows for exact analysis of what is going on in system memory, which can be useful for software developers, or for troubleshooting OS, software, and driver issues.

If this button was not actually pressed, you should ensure there is no physical fault with the front panel.

This event only gets logged if a user pressed the NMI button, and although it causes the OS to crash, is not an error.

Revision 1.1 Intel order number G74211-002 73