After doing some research I'm quite sure that this bug was introduced by [1] in the 5.4.29 mainline kernel and the 5.4.0-22.26 ubuntu kernel. The bug was already fixed by [2] in the 5.4.32 mainline kernel. At least that's the case on my machine [3] and Heiner Kallweit also pointed in this direction [4]. The only thing that doesn't fit in this picture is that adding realtek to /etc/modules fixed the problem for Ryan. But it didn't fix the problem for me.
[1] https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v5.4.32&id=791c420f42289fe9afed9e325c6b21eb6a5a329e [2] https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v5.4.32&id=3fcd53b1d859799686a08785afb8990566c31cfa [3] https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1873552 [4] https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1873512/comments/20 -- 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/1871182 Title: [RTL810xE] No ethernet connection Status in initramfs-tools package in Ubuntu: Confirmed Status in linux package in Ubuntu: Incomplete Bug description: ubuntu doesn't show cable plugged-in. Wifi is also intermittent. Errors in log with realtek. long boot up. No problems with live-USB or fresh install, only after update. sudo lspci -vnvn > lspci-vnvn.log pcilib: sysfs_read_vpd: read failed: Input/output error ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: linux-headers-5.4.0-22-generic 5.4.0-22.26 ProcVersionSignature: Ubuntu 5.4.0-22.26-generic 5.4.29 Uname: Linux 5.4.0-22-generic x86_64 ApportVersion: 2.20.11-0ubuntu24 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: finisdiem 1332 F.... pulseaudio /dev/snd/controlC0: finisdiem 1332 F.... pulseaudio CurrentDesktop: ubuntu:GNOME Date: Mon Apr 6 10:49:03 2020 InstallationDate: Installed on 2020-04-01 (4 days ago) InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Beta amd64 (20200331) MachineType: Hewlett-Packard HP Pavilion g6 Notebook PC ProcEnviron: PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 radeondrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-22-generic root=UUID=e2543a6c-bc86-40b3-a4dd-d9e29603fb52 ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-5.4.0-22-generic N/A linux-backports-modules-5.4.0-22-generic N/A linux-firmware 1.187 RfKill: 0: phy0: Wireless LAN Soft blocked: no Hard blocked: no SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 10/04/2012 dmi.bios.vendor: Insyde dmi.bios.version: F.15 dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: 1849 dmi.board.vendor: Hewlett-Packard dmi.board.version: 57.2F dmi.chassis.type: 10 dmi.chassis.vendor: Hewlett-Packard dmi.chassis.version: Chassis Version dmi.modalias: dmi:bvnInsyde:bvrF.15:bd10/04/2012:svnHewlett-Packard:pnHPPaviliong6NotebookPC:pvr088B110000305910000620100:rvnHewlett-Packard:rn1849:rvr57.2F:cvnHewlett-Packard:ct10:cvrChassisVersion: dmi.product.family: 103C_5335KV G=N L=CON B=HP S=PAV dmi.product.name: HP Pavilion g6 Notebook PC dmi.product.sku: C2N51UA#ABA dmi.product.version: 088B110000305910000620100 dmi.sys.vendor: Hewlett-Packard To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/initramfs-tools/+bug/1871182/+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
