I have solved this for my laptop, in 2 stages. First I installed r8168-dkms - the correct driver for my laptop. My network now appears to be up on resuming from suspend.
But I then found I could not open any DNS or IP addresses. Restarting system-resolved did not work. Restarting network-manager did not work. My laptop does run dnsmasq. I found an answer at https://askubuntu.com/questions/1029250/ubuntu-18-04-ethernet- disconnected-after-suspend which was for an r8169. This is an edited copy of the solution I found there: "We need to reload the module for the Ethernet interface when resuming from suspend, after suspend. So I created script /lib/systemd/system- sleep/r8168-refresh: #!/bin/bash PROGNAME=$(basename "$0") state=$1 action=$2 function log { logger -i -t "$PROGNAME" "$*" } log "Running $action $state" if [[ $state == post ]]; then modprobe -r r8168 \ && log "Removed r8168" \ && modprobe -i r8168 \ && log "Inserted r8168" fi and made it executable: chmod +x /lib/systemd/system-sleep/r8168-refresh The messages logged from the script will go to /var/log/syslog tagged with the name of the script and its PID. This way you can check whether the script reloaded the kernel module" This fixed my laptop. There are other suggested ways of doing similar things in the link above. -- 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/1752772 Title: r8169 ethernet card don't work after returning from suspension Status in linux package in Ubuntu: Fix Released Status in linux source package in Bionic: Fix Released Bug description: ===SRU Justification=== [Impact] Ethernet r8169 stops working after system resumed from suspend. [Test] User confirmed these patches fix the issue. r8169 continues to work after resume from suspend. [Regression Potential] Medium. The fix is limited to one device, all patches are in mainline. The WOL default change might cause regression for users that depend on BIOS settings. We can advice them to use userspace tool (systemd, ethtool, etc.) instead. ===Original Bug Report=== I have noticed that the network stopped working on my desktop after I've suspended the system and woke it up. On dmesg there are messages like: [ 150.877998] IPv6: ADDRCONF(NETDEV_UP): enp1s0: link is not ready [ 150.944101] do_IRQ: 3.37 No irq handler for vector [ 150.944105] r8169 0000:01:00.0 enp1s0: link down [ 150.944180] IPv6: ADDRCONF(NETDEV_UP): enp1s0: link is not ready When using Xenial (from a different install), this problem is not happening. This is happening on Bionic. There are only two ways to restore connectivity: 1) Reboot the system; 2) Remove the r8169 module and reinsert it with modprobe. The motherboard is a AsRock H55M-LE and the Ethernet controller is: 01:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 03) ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: linux-firmware 1.172 ProcVersionSignature: Ubuntu 4.15.0-10.11-generic 4.15.3 Uname: Linux 4.15.0-10-generic x86_64 ApportVersion: 2.20.8-0ubuntu10 Architecture: amd64 CurrentDesktop: LXDE Date: Fri Mar 2 00:21:57 2018 Dependencies: InstallationDate: Installed on 2018-02-26 (3 days ago) InstallationMedia: Lubuntu 18.04 LTS "Bionic Beaver" - Alpha amd64 (20180226) PackageArchitecture: all SourcePackage: linux-firmware UpgradeStatus: No upgrade log present (probably fresh install) --- AlsaVersion: Advanced Linux Sound Architecture Driver Version k4.15.0-10-generic. ApportVersion: 2.20.8-0ubuntu10 Architecture: amd64 ArecordDevices: **** List of CAPTURE Hardware Devices **** card 0: MID [HDA Intel MID], device 0: VT1818S Analog [VT1818S Analog] Subdevices: 1/1 Subdevice #0: subdevice #0 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: usuario 1153 F.... pulseaudio /dev/snd/controlC1: usuario 1153 F.... pulseaudio Card0.Amixer.info: Card hw:0 'MID'/'HDA Intel MID at 0xfbdf8000 irq 26' Mixer name : 'VIA VT1818S' Components : 'HDA:11060440,18492818,00100000' Controls : 40 Simple ctrls : 17 Card1.Amixer.info: Card hw:1 'HDMI'/'HDA ATI HDMI at 0xfbffc000 irq 27' Mixer name : 'ATI R6xx HDMI' Components : 'HDA:1002aa01,00aa0100,00100200' Controls : 7 Simple ctrls : 1 Card1.Amixer.values: Simple mixer control 'IEC958',0 Capabilities: pswitch pswitch-joined Playback channels: Mono Mono: Playback [on] CurrentDesktop: LXDE Dependencies: DistroRelease: Ubuntu 18.04 HibernationDevice: RESUME=UUID=edd83175-c707-4b31-90d2-ce2f5cebc73f InstallationDate: Installed on 2018-02-26 (3 days ago) InstallationMedia: Lubuntu 18.04 LTS "Bionic Beaver" - Alpha amd64 (20180226) MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M. Package: linux-firmware 1.172 PackageArchitecture: all ProcFB: 0 radeondrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz root=UUID=0c4fc517-b7a0-49b0-bfcb-0485dfe6413b ro quiet ProcVersionSignature: Ubuntu 4.15.0-10.11-generic 4.15.3 RelatedPackageVersions: linux-restricted-modules-4.15.0-10-generic N/A linux-backports-modules-4.15.0-10-generic N/A linux-firmware 1.172 RfKill: Tags: bionic Uname: Linux 4.15.0-10-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip libvirt lpadmin plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 10/20/2010 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: P1.80 dmi.board.name: H55M-LE dmi.board.vendor: ASRock dmi.chassis.asset.tag: To Be Filled By O.E.M. dmi.chassis.type: 3 dmi.chassis.vendor: To Be Filled By O.E.M. dmi.chassis.version: To Be Filled By O.E.M. dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrP1.80:bd10/20/2010:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnH55M-LE:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.: dmi.product.family: To Be Filled By O.E.M. dmi.product.name: To Be Filled By O.E.M. dmi.product.version: To Be Filled By O.E.M. dmi.sys.vendor: To Be Filled By O.E.M. 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