Rpi3B+ kernel oops phy_ethtool_ksettings_get

Help and Support Raspberry Pi
1

I’m getting a kernel oops on startup that is similar to https://patchwork.kernel.org/patch/10282365/

I updated an instance on my pi3 then cloned it.

Any thoughts ?

2

So, looking closer at my oops screenshot.
It was the snmpd process that triggered it in my case.

I’ve disabled snmpd and it now appears to work fine.

I suspect we still have the bug I refererenced above, but snmpd seems to start early in the boot process (S02snmpd) and is probably similarly triggering the issue.

3

Hi @penfold42. I hope you’re doing well.

I’ve added the patch as a precaution. Can you give it a test?

  1. Login via the command line
  2. Edit the file /etc/apt/sources.list
  3. Add the following line: deb http://apt.osmc.tv stretch-devel main
  4. Run the following commands to update: sudo apt-get update && sudo apt-get dist-upgrade && reboot
  5. Your system should have have received the update.

Please see if the issue is resolved.

I also recommend you edit /etc/apt/sources.list again and remove the line that you added after updating. This will return you to the normal update channel.

Cheers

Sam

4

Thanks for the quick work.

it took a few hours for the updated kernel to appear - CDN network delay ?

It appears to have worked.

thanks!

5

I may have been too hasty… whilst the box boots fine, what i didnt realise until now is that ethernet doesnt work.

the gui thinks “Status: No wired connection”

grab-logs -A are at https://paste.osmc.tv/yoqecicefo

6 
Nov 04 04:16:42 newpi3.home systemd[1]: networking.service: Cannot add dependency job, ignoring: Unit networking.service is masked.

What’s the output from running systemctl status networking.service ?

7

I’m not sure if the patch is suitable.

It would be good if others could try it and comment

Sam

10

What’s the easiest way to roll back the kernel ?

11 
# systemctl status networking.service
● networking.service
   Loaded: masked (/dev/null; bad)
   Active: inactive (dead)
12

Not sure if this is the “right” way to do it, but I just did:
cp /boot/vmlinuz-4.14.26-2-osmc /boot/kernel.img

Seems to have done the trick and now i have wired ethernet back (with no snmpd)

13

Almost. There’s one more step to do.

You need to cd to /boot and remove all the bcm-xxxxx.dtb files and the overlays directory + its contents (sudo rm -r overlays)

Then (using sudo) you need to copy the bcm-xxxxx.dtb files and overlays directory + its contents from /boot/dtb-4.14.26-2-osmc to /boot.

14

Thanks !

I guess I’m lucky for now - such a minor kernel rollback, there might not have been any significant differences in the overlays

15

Indeed. Your new kernel might have contained a few other small changes but overall was a minor update.

16

And some other commits last night claim to fix the issue

17

Waiting for a couple of improvements yet before I’ll make any further testing available.

Sam