igc driver for Comet Lake onboard 15f3 NIC drops all igmp packets

[Marc Culler]

This is occurring on Ubuntu 20.04 with kernel 5.4.0-56-generic.

To demonstrate, run
$ sudo tcpdump -nv -ienp4s0 igmp
(adjusting the interface name appropriately).

The result will be 0 packets captured, even though all other Ubuntu
systems on the same ethernet lan are reporting igmp queries from the
router and responding with reports every minute or so.

One consequence of this is that a CUPS server using the Comet Lake
onboard ethernet controller cannot be detected by any clients, except
within the first 120 seconds after restarting the avahi-daemon. Since
the Comet Lake server does not receive the igmp queries, it does not
respond with a report and so the router unsubscribes the interface
from the multicast group that is used by avahi and bonjour. This
makes the CUPS server disappear.

The output of ubuntu-bug linux is attached.
---
ProblemType: Bug
ApportVersion: 2.20.11-0ubuntu27.13
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: culler 2071 F.... pulseaudio
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
DistroRelease: Ubuntu 20.04
InstallationDate: Installed on 2020-11-17 (13 days ago)
InstallationMedia: Ubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731)
MachineType: Gigabyte Technology Co., Ltd. Z490I AORUS ULTRA
Package: linux (not installed)
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-56-generic root=UUID=bdba1f28-6903-467f-abfa-10c6bee47cd7 ro quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 5.4.0-56.62-generic 5.4.73
RelatedPackageVersions:
 linux-restricted-modules-5.4.0-56-generic N/A
 linux-backports-modules-5.4.0-56-generic N/A
 linux-firmware 1.187.4
Tags: focal
Uname: Linux 5.4.0-56-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin lxd plugdev sambashare sudo
_MarkForUpload: True
dmi.bios.date: 11/03/2020
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: F6b
dmi.board.asset.tag: Default string
dmi.board.name: Z490I AORUS ULTRA
dmi.board.vendor: Gigabyte Technology Co., Ltd.
dmi.board.version: x.x
dmi.chassis.asset.tag: Default string
dmi.chassis.type: 3
dmi.chassis.vendor: Default string
dmi.chassis.version: Default string
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrF6b:bd11/03/2020:svnGigabyteTechnologyCo.,Ltd.:pnZ490IAORUSULTRA:pvr-CF:rvnGigabyteTechnologyCo.,Ltd.:rnZ490IAORUSULTRA:rvrx.x:cvnDefaultstring:ct3:cvrDefaultstring:
dmi.product.family: Z490 MB
dmi.product.name: Z490I AORUS ULTRA
dmi.product.sku: Default string
dmi.product.version: -CF
dmi.sys.vendor: Gigabyte Technology Co., Ltd.

[Ubuntu Foundations Team Bug Bot (crichton)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. It seems that your bug report is not filed about a specific source package though, rather it is just filed against Ubuntu in general. It is important that bug reports be filed about source packages so that people interested in the package can find the bugs about it. You can find some hints about determining what package your bug might be about at https://wiki.ubuntu.com/Bugs/FindRightPackage. You might also ask for help in the #ubuntu-bugs irc channel on Freenode.

To change the source package that this bug is filed about visit https://bugs.launchpad.net/ubuntu/+bug/1906418/+editstatus and add the package name in the text box next to the word Package.

[This is an automated message. I apologize if it reached you inappropriately; please just reply to this message indicating so.]

[Marc Culler (marc-culler)]

The line from dpkg.log reporting installation of this kernel package is:
2020-12-01 06:19:50 status installed linux-image-5.4.0-56-generic:amd64 5.4.0-56.62

[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 1906418

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.

[Marc Culler (marc-culler)]

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[Marc Culler (marc-culler)]

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[Marc Culler (marc-culler)]

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[Marc Culler (marc-culler)]

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[Marc Culler (marc-culler)]

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[Marc Culler (marc-culler)]

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[Marc Culler (marc-culler)]

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[Marc Culler (marc-culler)]

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[Marc Culler (marc-culler)]

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[Marc Culler (marc-culler)]

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[Marc Culler (marc-culler)]

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[Marc Culler (marc-culler)]

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[Marc Culler (marc-culler)]

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[Marc Culler (marc-culler)]

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[Marc Culler (marc-culler)]

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[Marc Culler (marc-culler)]

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[Marc Culler (marc-culler)]

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[Marc Culler (marc-culler)]

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[Francois Gervais (dc-fgervais)]

Same here.

Tiger Canyon
Intel NUC 11 Pro NUC11TNKi5
Ethernet Controller i225-LM
20.04.2 LTS (Focal Fossa)
5.4.0-77-generic #86-Ubuntu

*-network
       description: Ethernet interface
       product: Intel Corporation
       vendor: Intel Corporation
       physical id: 0
       bus info: pci@0000:58:00.0
       logical name: enp88s0
       version: 03
       serial:
       size: 1Gbit/s
       capacity: 1Gbit/s
       width: 32 bits
       clock: 33MHz
       capabilities: bus_master cap_list ethernet physical 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=igc driverversion=0.0.1-k duplex=full ip=192.168.2.156 latency=0 link=yes multicast=yes port=twisted pair speed=1Gbit/s
       resources: irq:17 memory:6a200000-6a2fffff memory:6a300000-6a303fff

cat /sys/devices/pci0000:00/0000:00:1d.0/0000:58:00.0/net/enp88s0/statistics/multicast
0

[Francois Gervais (dc-fgervais)]

I was having the problem on ubuntu-20.04.2-live-server-amd64.

I tried booting on live ubuntu-20.04.2-live-server-amd64 which has kernel 5.11 and the problem is fixed on my side.

I even tried booting on live ubuntu-20.04.2.0-desktop-amd64 which is kernel 5.8 and the issue is also fixed.

[Marc Culler (marc-culler)]

You are right! With the 5.11 kernel I am now seeing igmp packets over ethernet. Thanks!

[Marc Culler (marc-culler)]

Marking this fixed, since the problem does not occur with the current kernel for Ubuntu 20.04.