OK, I looked at the source for this module: https://github.com/torvalds/linux/blob/master/drivers/watchdog/iTCO_wdt.c
Unless the latest version has changed drastically from 5.10.0-21, then I should be seeing an error of some sort if it is running the probe function iTCO_wdt_probe(). Every return in that function before "Found a %s TCO device" is an error. What would cause the probe not to run at all? Also, I tried disabling secure boot to no avail. Thanks, Perry On Wed, Mar 8, 2023 at 11:00 AM Perry Naseck <mailingli...@perrynaseck.com> wrote: > Hello! > > I cannot get the iTCO_wdt device to be found. I'm not sure how else to > troubleshoot at this point, so any help with that is appreciated (i.e. a > way to manually check if the device exists or etc.). > > I am using Debian 11 on an Intel NUC CMCR1ABB chassis with a CM11EBi716W > module. This is an i7 and the watchdog is enabled in the BIOS. I am using > the latest BIOS v71. Kernel: 5.10.0-21-amd64 #1 SMP Debian 5.10.162-1 > (2023-01-21) x86_64 GNU/Linux. > > Every single time I run "modprobe iTCO-wdt" I see in dmesg: > iTCO_vendor_support: vendor-support=0 > iTCO_wdt: Intel TCO WatchDog Timer Driver v1.11 > And that's it. No device found and no new /dev/watchdog devices or > anything new in wdctl. > > I have tried: > 1. Simply "modprobe iTCO-wdt" > 2. Also loading "i2c-i801" and "i2c-smbus" first and then loading the > module > 3. Blacklisting wdat_wdt and adding nmi_watchdog=0 to GRUB, which > correctly caused the existing /dev/watchdog software device to disappear > but iTCO_wdt still didn't work > > I found one other user with the same issue several years go: > https://forums.debian.net/viewtopic.php?t=146358 > > I'm very certain that this device supports the watchdog, as there is a > BIOS option to enable it and Intel has a Windows daemon to make use of it. > Is there another Intel watchdog scheme besides iTCO_wdt? Would secureboot > lockdown be interfering with this? > > Thanks, > Perry >
