I've just upgraded to 21.04. Now after waking from suspension. The network cable is shown as unplugged. I found a solution. which is I have to remove and reinstall the ethernet device driver. Via modprobe -r and then -i. Everytime after waking from suspend.
Is there any elegant and simple solution to fix this?
Upgraded from 20.10 to 21.04
lspci -nn | grep -i ethernet
04:00.0 Ethernet controller [0200]: Qualcomm Atheros Killer E220x Gigabit Ethernet Controller [1969:e091] (rev 13)
sudo lshw -C network
-network
description: Ethernet interface
product: Killer E220x Gigabit Ethernet Controller
vendor: Qualcomm Atheros
physical id: 0
bus info: pci@0000:04:00.0
logical name: enp4s0
version: 13
serial: 44:8a:5b:46:f3:a5
size: 1Gbit/s
capacity: 1Gbit/s
width: 64 bits
clock: 33MHz
capabilities: pm pciexpress msi msix bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=alx driverversion=5.11.0-18-generic duplex=full ip=192.168.1.158 latency=0 link=yes multicast=yes port=twisted pair speed=1Gbit/s
resources: irq:19 memory:f7900000-f793ffff ioport:d000(size=128)
-network DISABLED
description: Wireless interface
product: Wireless 3160
vendor: Intel Corporation
physical id: 0
bus info: pci@0000:05:00.0
logical name: wlp5s0
version: 83
serial: 30:3a:64:5f:7b:1b
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=iwlwifi driverversion=5.11.0-18-generic firmware=17.3216344376.0 3160-17.ucode latency=0 link=no multicast=yes wireless=IEEE 802.11
resources: irq:35 memory:f7800000-f7801fff
inxi -Fxz
System: Kernel: 5.11.0-18-generic x86_64 bits: 64 compiler: gcc v: 10.2.1 Desktop: GNOME 3.38.4
Distro: Ubuntu 21.04 (Hirsute Hippo)
Machine: Type: Laptop System: Micro-Star product: GP70 2PE v: REV:1.0 serial: <filter>
Mobo: Micro-Star model: MS-175A v: REV:1.0 serial: <filter> BIOS: American Megatrends v: E175AIMS.109
date: 05/27/2014
Battery: ID-1: BAT1 charge: 6.8 Wh condition: 6.8/48.8 Wh (14%) model: MSI Corp. MS-175A status: Full
CPU: Info: Quad Core model: Intel Core i7-4710HQ bits: 64 type: MT MCP arch: Haswell rev: 3 L2 cache: 6 MiB
flags: avx avx2 lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx bogomips: 39909
Speed: 2561 MHz min/max: 1800/3500 MHz Core speeds (MHz): 1: 2561 2: 2852 3: 2695 4: 2582 5: 2495 6: 2494 7: 2467
8: 2487
Graphics: Device-1: Intel 4th Gen Core Processor Integrated Graphics vendor: Micro-Star MSI driver: i915 v: kernel
bus ID: 00:02.0
Device-2: NVIDIA GM108M [GeForce 840M] vendor: Micro-Star MSI driver: nvidia v: 460.80 bus ID: 01:00.0
Display: x11 server: X.Org 1.20.11 driver: loaded: modesetting,nvidia unloaded: fbdev,nouveau,vesa
resolution: 1600x900
OpenGL: renderer: GeForce 840M/PCIe/SSE2 v: 4.6.0 NVIDIA 460.80 direct render: Yes
Audio: Device-1: Intel Xeon E3-1200 v3/4th Gen Core Processor HD Audio vendor: Micro-Star MSI driver: snd_hda_intel
v: kernel bus ID: 00:03.0
Device-2: Intel 8 Series/C220 Series High Definition Audio vendor: Micro-Star MSI driver: snd_hda_intel v: kernel
bus ID: 00:1b.0
Sound Server: ALSA v: k5.11.0-18-generic
Network: Device-1: Qualcomm Atheros Killer E220x Gigabit Ethernet vendor: Micro-Star MSI driver: alx v: kernel port: d000
bus ID: 04:00.0
IF: enp4s0 state: up speed: 1000 Mbps duplex: full mac: <filter>
Device-2: Intel Wireless 3160 driver: iwlwifi v: kernel port: d000 bus ID: 05:00.0
IF: wlp5s0 state: down mac: <filter>
Bluetooth: Device-1: Intel Bluetooth wireless interface type: USB driver: btusb v: 0.8 bus ID: 1-1.3:4
Report: ID: hci0 state: up running pscan bt-v: 2.1 lmp-v: 4.0 address: <filter>
Drives: Local Storage: total: 931.51 GiB used: 596.27 GiB (64.0%)
ID-1: /dev/sda vendor: Toshiba model: MQ01ABD100 size: 931.51 GiB temp: 39 C
Partition: ID-1: / size: 914.9 GiB used: 596.27 GiB (65.2%) fs: ext4 dev: /dev/sda4
ID-2: /boot/efi size: 512 MiB used: 4 KiB (0.0%) fs: vfat dev: /dev/sda3
Swap: ID-1: swap-1 type: file size: 2 GiB used: 23.8 MiB (1.2%) file: /swapfile
Sensors: System Temperatures: cpu: 84.0 C mobo: N/A gpu: nvidia temp: 42 C
Fan Speeds (RPM): N/A
Info: Processes: 365 Uptime: 7h 58m Memory: 15.55 GiB used: 5.48 GiB (35.2%) Init: systemd runlevel: 5 Compilers:
gcc: 10.3.0 Packages: 2784 Shell: Bash v: 5.1.4 inxi: 3.3.01
cat /etc/network/interfaces and cat /etc/netplan/*.yaml
cat: /etc/network/interfaces: No such file or directory
cat: and: No such file or directory
cat: cat: No such file or directory
Let NetworkManager manage all devices on this system
network:
version: 2
renderer: NetworkManager
Update. I followed the suggestions here. The drivers are not automatically removed and installed after waking from suspension. https://askubuntu.com/a/1058760/1247412
