[DNV]Watchdog can not reboot system

[quanxian]

Description:
Watchdog not work on Denverton and KBL-NUC platform.

Commit IDs:851a15114895c5bce163a6f2d57e0aa4658a1be4
Target Kernel: 4.19

Target Release: 19.04

[quanxian (quanxian-wang)]

if needed, it can also cherry picked to 18.10 or 16.04.x. Dawson Canyon is supported by Canonical with OEM image.

[Chih-Hsyuan Ho (chih)]

@Quanxian, Dawson Canyon has already been migrated to 16.04.5. We will get the Canonical kernel team to review this patch and see if it can be back ported to Xenial.

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:

apport-collect 1792536

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

[Chih-Hsyuan Ho (chih)]

@Quanxian, by the way, can you share with us how exactly we can verify this feature in Dawson Canyon after we add this commit please?

[quanxian (quanxian-wang)]

this commit only fix DNV, instead of KBL-NUC. Our engineer is contacting upstream for confirmation. The commit will be soon for KBL-NUC. I will input the commit here.

About the testing,

1) loading two modules
#modprobe i2c_i801
#modprobe iTCO_wdt
2) check watchdog device
ls /dev/watchdog*
3) run this command, it should reboot the machine after a while.
cat /dev/watchdog; for i in `seq 1 100`; do echo $i; sleep 1; done

[quanxian (quanxian-wang)]

KBL will use another bug.

[quanxian (quanxian-wang)]

for KBL, it will old watchdog driver. Not a kernel issue.