Watchdog and dietpi v10.5.2 unexpeced reboot while using the sdcard

General Discussion
1

Not sure if someone else found this issue but I have this configuration:

watchdog.conf:

watchdog-device         = /dev/watchdog
watchdog-timeout        = 180
watchdog-refresh-use-settimeout = auto
interval                = 10
realtime                = yes
priority                = 1
min-memory              = 12800
allocatable-memory      = 1

Platform Pi 3b+

Observed and steps:

apt update (ok)

apt-get upgrade -y (unexpected reboot)

apt autoremove (unexpected reboot)

Disabled watchdog via systemctl… then the reboot is not there.

Any comments or feedback? any idea is appreciated.

2

it seems the interval value is hardcoded in the hw with 15seconds

The operations on the sdcard block the refresh of the watchdog, exceeding the 15seconds, triggering the restart. As a potential workaround I increased the priority for the watchdog, that is working ok so far.

3

Well, increased the priority didn’t work. Anyone there with the same issue? any idea to solve this?

4

nah, config issue in my side on the watchdog.conf. My bad

5

Are you willing to share what was falsely configured? :slight_smile:

6

Basically I was using 12800 instead of 1280 (@80mb-75 mb free) on the free memory check, so my pi 3b+ 1gb ram was rebooted due to that, 12800 means 800mb of free memory and i was below that value when I was playing around with the apt command. The final valid configuration file is:

# cat /etc/watchdog.conf | egrep -v "#"

watchdog-device         = /dev/watchdog

watchdog-timeout        = 15

watchdog-refresh-use-settimeout = no

interval                = 2

realtime                = yes
priority                = 1

min-memory              = 1280
allocatable-memory      = 1

Can be checked with “wdctl” command