Hi Everyone, We have a number of systems that fail to initialize the iTCO watchdog with “unable to reset NO_REBOOT flag, device disabled by hardware/BIOS”. The systems include Broadwell SOC, Haswell w/ C222, and Ivy Bridge w/ C600/X79. These systems have different BIOS vendors/versions. We have tested with a few different kernel versions as recent as 4.4. We have only managed successfully configure the iTCO watchdog on a Haswell w/ C610/X99 system. Has anyone successfully used the iTCO watchdog on a Broadwell Xeon-D/SOC system? Can anyone provide advice on how to debug this issue? Thanks, -Jonathan # uname -a Linux soc 4.4.23-1.el7.elrepo.x86_64 #1 SMP Fri Sep 30 09:11:50 EDT 2016 x86_64 x86_64 x86_64 GNU/Linux # dmesg | grep iTCO [ 18.544987] iTCO_vendor_support: vendor-support=0 [ 18.549213] iTCO_wdt: Intel TCO WatchDog Timer Driver v1.11 [ 18.549245] iTCO_wdt: unable to reset NO_REBOOT flag, device disabled by hardware/BIOS # find /sys/devices | grep iTCO /sys/devices/pci0000:00/0000:00:1f.0/iTCO_wdt.0.auto /sys/devices/pci0000:00/0000:00:1f.0/iTCO_wdt.0.auto/power /sys/devices/pci0000:00/0000:00:1f.0/iTCO_wdt.0.auto/power/control /sys/devices/pci0000:00/0000:00:1f.0/iTCO_wdt.0.auto/power/runtime_active_time /sys/devices/pci0000:00/0000:00:1f.0/iTCO_wdt.0.auto/power/autosuspend_delay_ms /sys/devices/pci0000:00/0000:00:1f.0/iTCO_wdt.0.auto/power/runtime_status /sys/devices/pci0000:00/0000:00:1f.0/iTCO_wdt.0.auto/power/runtime_suspended_time /sys/devices/pci0000:00/0000:00:1f.0/iTCO_wdt.0.auto/driver_override /sys/devices/pci0000:00/0000:00:1f.0/iTCO_wdt.0.auto/modalias /sys/devices/pci0000:00/0000:00:1f.0/iTCO_wdt.0.auto/subsystem /sys/devices/pci0000:00/0000:00:1f.0/iTCO_wdt.0.auto/uevent /sys/devices/pci0000:00/0000:00:1f.0/iTCO_wdt.0.auto/firmware_node -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
