Good news everyone - this has been fixed in kernel 5.9-rc1: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=79814d8179b3c62f700196dcbd6a2ca2bb0dd188
Also see https://bugs.debian.org/965074 ** Bug watch added: Debian Bug tracker #965074 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=965074 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1779173 Title: Dell D6000 dock lacks multicast Ethernet functionality Status in Linux: Confirmed Status in linux package in Ubuntu: Triaged Bug description: Dell D6000 exposes a CDC_NCM device for Ethernet traffic. However, multicast Ethernet traffic is not processed making IPv6 not functional. Other services, like mDNS used for LAN service discovery are also hindered. The actual reason is that CDC_NCM driver was not processing requests to filter (admit) multicast traffic. I provide two patches to the linux kernel that admit all Ethernet multicast traffic whenever a multicast group is being joined. The solution is not optimal, as it makes the system receive more traffic than that strictly needed, but otherwise this only happens when the computer is connected to a dock and thus is running on AC power. I believe it is not worth the hassle to join only the requested groups. This is the same that is done in the CDN_ETHER driver. To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1779173/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
