Changes
/* Notes */
== List of tested devices ==
* The guide was tested on a systems with the specs listed below, but should be easily adaptable
Device: Airtop3
CPU: Intel(R) Xeon(R) E-2176G CPU @ 3.70GHz
BIOS: 10/28/2019 American Megatrends Inc. ATOP3.PRD.0.29.4
OS: Linux Mint 19.2 Tina
Kernel: 4.15.0-54-generic
Kernel module: wdat_wdt
Device: fitlet2
BIOS: 05/14/2018 American Megatrends Inc. FLT2.0.40.01.00
OS: Linux Mint 19 Tara
Kernel: 4.15.0-2023-generic
Kernel module: iTCO_wdt
BIOS: 11/30/2015 American Megatrends Inc. SBCFLT_0.08.08
OS: Linux Mint 19 Tara
Kernel: 4.15.0-2023-generic
Kernel module: sp5100_tco
BIOS: 05/30/2017 Compulab Ltd. IPC2_3.330.5
OS: Linux Mint 19 Tara
Kernel: 4.15.0-2023-generic
Kernel module: iTCO_wdt
Device: IPC3
CPU: Intel(R) Core(TM) i5-7200U
BIOS: 08/09/2018 American Megatrends Inc. 5.12_IPC3K.PRD.0.25.7
OS: Linux Mint 19 Tara
Kernel: 4.15.0-23-generic
Kernel module: wdat_wdt
<br>
== Notes ==
*'''fitlet1''': kernel module i2c_piix4 should be blacklisted
** Expand the below guideinstructions
<div class="toccolours mw-collapsible mw-collapsed" overflow:auto;">
Add the following lines to the /etc/modprobe.d/blacklist.conf
</div>
*'''IPC2-Haswell''': iTCO Watchdog does not reset ACPI Watchdog timer
** Expand the below guideinstructions
<div class="toccolours mw-collapsible mw-collapsed" overflow:auto;">
* if the iTCO BIOS does not reset the ACPI Watchdog timer, you may need to disable the BIOS configuration from Linux
$ apt install ioport
* '''Note:''' On Ubuntu versions below 18.04 , ioport should be installed manually from:
https://packages.ubuntu.com/bionic/ioport
$ sudo chmod +x /etc/rc.local
</div>
*'''Airtop3''': Make sure you have correct BIOS settings:
**Expand the below instructions
<div class="toccolours mw-collapsible mw-collapsed">
# Press '''[ESC]''' on startup to enter BIOS settings
# Chipset -> PCH-IO Configuration -> Enable TCO Timer is set to '''[Enabled]'''
# If not, set to '''[Enabled]'''
# Navigate to '''"Save & Exit"''' tab and choose '''Save changes and exit'''
</div>
*'''fitlet2''': Make sure you have correct BIOS settings:
**Expand the below instructions
<div class="toccolours mw-collapsible mw-collapsed">
# Press '''[ESC]''' on startup to enter BIOS settings
# At the bottom of the main screen check '''OS selection''' is set to '''[Linux]'''
# If not, set to '''[Linux]'''
# Navigate to '''"Save & Exit"''' tab and choose '''Save changes and exit'''.
</div>
<br>
* The following usage example represented on fitlet2 with kernel module iTCO_wdt
** For fitlet1 use kernel module sp5100_tco
** For IPC3, Airtop3 use kernel module wdat_wdt
<br>
* Verify it can be loaded successfully and information about the device appears in dmesg output
* NOTE: kernel module wdat_wdt does not produce debug messages, dmesg output will be empty
$ sudo modprobe iTCO_wdt
$ dmesg | grep -i iTCO
