I have the same problem. I am on "Linux Mint 18.2 Sonya". Upgrading to Kernel 4.15.0-39.42~16.04.1 showed the same problem. I reverted to a 4.13 kernel for this reason.
$ lshw -class network WARNUNG: Sie sollten dieses Programm mit Systemverwalterrechten (root) ausführen. *-network DEAKTIVIERT Beschreibung: Kabellose Verbindung Produkt: BCM4312 802.11b/g LP-PHY Hersteller: Broadcom Corporation Physische ID: 0 Bus-Informationen: pci@0000:0c:00.0 Logischer Name: wlp12s0 Version: 01 Seriennummer: 00:26:5e:33:a9:6d Breite: 64 bits Takt: 33MHz Fähigkeiten: bus_master cap_list ethernet physical wireless Konfiguration: broadcast=yes driver=wl0 driverversion=6.30.223.271 (r587334) latency=0 multicast=yes wireless=IEEE 802.11 Ressourcen: irq:17 memory:f69fc000-f69fffff *-network Beschreibung: Ethernet interface Produkt: 88E8040 PCI-E Fast Ethernet Controller Hersteller: Marvell Technology Group Ltd. Physische ID: 0 Bus-Informationen: pci@0000:09:00.0 Logischer Name: enp9s0 Version: 13 Seriennummer: 00:25:64:4a:26:00 Größe: 100Mbit/s Kapazität: 100Mbit/s Breite: 64 bits Takt: 33MHz Fähigkeiten: bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd autonegotiation Konfiguration: autonegotiation=on broadcast=yes driver=sky2 driverversion=1.30 duplex=full ip=192.168.1.7 latency=0 link=yes multicast=yes port=twisted pair speed=100Mbit/s Ressourcen: irq:24 memory:f68fc000-f68fffff ioport:de00(Größe=256) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1798921 Title: sky2 ethernet card don't work after returning from suspension To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1798921/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs