As a note - I have an internal Lenovo bug tracking this: https://bugs.launchpad.net/sutton/+bug/1938174
I did a bit of investigation just before I went on vacation and I believe this is a regression in the Ubuntu kernel - I'm not seeing the issue with a vanilla kernel.org kernel Mark -- 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/1938697 Title: Kernel driver support issue between 5.4.0-74-generic and 5.4.0-80-generic Status in linux package in Ubuntu: New Bug description: I have found an issue after upgrading my Kernel from 5.4.0-74-generic to 5.4.0-80-generic on Ubuntu 20.04. It appears that support for the second ethernet port on my Lenovo m90n-1 has been dropped or isn't working as expected. After upgrading to 5.4.0-80-generic my second ethernet port Both ethernet ports use the r8169 driver. If I switch back to the previous kernel 5.4.0-74-generic. The second ethernet port is usable again. I did attempt under 5.4.0-80-generic to see if I could get an error message. When the driver attempts to discover the second ethernet port the following error is thrown. "unknown chip XID fcf" Support output below: --- Before update. Welcome to Ubuntu 20.04.2 LTS (GNU/Linux 5.4.0-74-generic x86_64) root@lenovo-test-3:~# lshw -c network *-network DISABLED description: Wireless interface product: Cannon Point-LP CNVi [Wireless-AC] vendor: Intel Corporation physical id: 14.3 bus info: pci@0000:00:14.3 logical name: wlo1 version: 30 serial: 54:8d:5a:ab:41:77 width: 64 bits clock: 33MHz capabilities: pm msi pciexpress msix bus_master cap_list ethernet physical wireless configuration: broadcast=yes driver=iwlwifi driverversion=5.4.0-74-generic firmware=46.6bf1df06.0 latency=0 link=no multicast=yes wireless=IEEE 802.11 resources: irq:16 memory:a141c000-a141ffff *-network description: Ethernet interface product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller vendor: Realtek Semiconductor Co., Ltd. physical id: 0 bus info: pci@0000:02:00.0 logical name: enp2s0 version: 15 serial: 98:fa:9b:c9:eb:c6 size: 1Gbit/s capacity: 1Gbit/s width: 64 bits clock: 33MHz capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation configuration: autonegotiation=on broadcast=yes driver=r8169 duplex=full firmware=rtl8168h-2_0.0.2 02/26/15 ip=192.168.1.144 latency=0 link=yes multicast=yes port=MII speed=1Gbit/s resources: irq:19 ioport:4000(size=256) memory:a1304000-a1304fff memory:a1300000-a1303fff *-network description: Ethernet interface product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller vendor: Realtek Semiconductor Co., Ltd. physical id: 0 bus info: pci@0000:04:00.0 logical name: enp4s0 version: 1b serial: 98:fa:9b:c9:eb:c7 capacity: 1Gbit/s width: 64 bits clock: 33MHz capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation configuration: autonegotiation=on broadcast=yes driver=r8169 firmware=rtl8168h-2_0.0.2 02/26/15 latency=0 link=no multicast=yes port=MII resources: irq:19 ioport:3000(size=256) memory:a1204000-a1204fff memory:a1200000-a1203fff --- After update root@lenovo-test-3:~# uname -r 5.4.0-80-generic root@lenovo-test-3:~# lshw -c network *-network DISABLED description: Wireless interface product: Cannon Point-LP CNVi [Wireless-AC] vendor: Intel Corporation physical id: 14.3 bus info: pci@0000:00:14.3 logical name: wlo1 version: 30 serial: 54:8d:5a:ab:41:77 width: 64 bits clock: 33MHz capabilities: pm msi pciexpress msix bus_master cap_list ethernet physical wireless configuration: broadcast=yes driver=iwlwifi driverversion=5.4.0-80-generic firmware=46.6bf1df06.0 latency=0 link=no multicast=yes wireless=IEEE 802.11 resources: irq:16 memory:a141c000-a141ffff *-network description: Ethernet interface product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller vendor: Realtek Semiconductor Co., Ltd. physical id: 0 bus info: pci@0000:02:00.0 logical name: enp2s0 version: 15 serial: 98:fa:9b:c9:eb:c6 size: 1Gbit/s capacity: 1Gbit/s width: 64 bits clock: 33MHz capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation configuration: autonegotiation=on broadcast=yes driver=r8169 duplex=full firmware=rtl8168h-2_0.0.2 02/26/15 ip=192.168.1.144 latency=0 link=yes multicast=yes port=MII speed=1Gbit/s resources: irq:19 ioport:4000(size=256) memory:a1304000-a1304fff memory:a1300000-a1303fff To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1938697/+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
