apport information ** Tags added: apport-collected focal
** Description changed: 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. ** Attachment added: "AlsaInfo.txt" https://bugs.launchpad.net/bugs/1906418/+attachment/5440071/+files/AlsaInfo.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1906418 Title: igc driver for Comet Lake onboard 15f3 NIC drops all igmp packets To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1906418/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
