Changes
/* List of tested devices */
== 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
OS: Linux Mint 19 Tara
Kernel: 4.15.0-23-generic
Kernel module: iTCO_wdt
Device: fitlet2
CPU: Intel(R) Atom(TM) Processor E3950
BIOS: 09/17/2018 American Megatrends Inc. FLT2.0.46.01.00
OS: Linux Mint 20 Ulyana
Kernel: 5.4.0-42-generic
Kernel module: iTCO_wdt
== 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
$ sudo chmod +x /etc/rc.local
</div>
*'''IPC3Airtop3''': kernel module wdat_wdt does 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 produce debug messages, dmesg output will be emptyset to '''[Enabled]'''# Navigate to '''"Save & Exit"''' tab and choose '''Save changes and exit'''</div>
*'''fitlet2''': Make sure OS selection is set to '''[Linux]'''you have correct BIOS settings:**Expand the below instructions<div class="toccolours mw-collapsible mw-collapsed" style="float:left; margin-left:1em;" overflow:auto;># 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
