System stopped detecting Ethernet after restoring with Timeshift.

[TwoOhFive]

Hello.
Today I decided to try upgrading to Linux Mint 21, but after I learned it deleted some programs I reverted back to a Timeshift backup to get my stuff back. Unfortunately after doing this, my computer stopped detecting ethernet connections. I'm using the latest kernel. Strangely enough, I can connect to Wi-fi. But that's all I can do. I also tried restarting, to no avail.

I think this may help as well. This is the output of inxi -Fxxxrz

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  CPU:
  Topology: 8-Core model: AMD Ryzen 7 3700X bits: 64 type: MT MCP arch: Zen 
  L2 cache: 4096 KiB bogomips: 115195 
  Speed: 2200 MHz min/max: 2200/3600 MHz boost: enabled Core speeds (MHz): 
  1: 2195 2: 2197 3: 2200 4: 2195 5: 2199 6: 2200 7: 2200 8: 2200 9: 2198 
  10: 2198 11: 2199 12: 2199 13: 2222 14: 2179 15: 2199 16: 2194 
  Flags: 3dnowprefetch abm adx aes aperfmperf apic arat avic avx avx2 bmi1 
  bmi2 bpext cat_l3 cdp_l3 clflush clflushopt clwb clzero cmov cmp_legacy 
  constant_tsc cpb cpuid cqm cqm_llc cqm_mbm_local cqm_mbm_total 
  cqm_occup_llc cr8_legacy cx16 cx8 de decodeassists extapic extd_apicid 
  f16c flushbyasid fma fpu fsgsbase fxsr fxsr_opt ht hw_pstate ibpb ibs 
  irperf lahf_lm lbrv lm mba mca mce misalignsse mmx mmxext monitor movbe 
  msr mtrr mwaitx nonstop_tsc nopl npt nrip_save nx osvw overflow_recov pae 
  pat pausefilter pclmulqdq pdpe1gb perfctr_core perfctr_llc perfctr_nb 
  pfthreshold pge pni popcnt pse pse36 rapl rdpid rdpru rdrand rdseed rdt_a 
  rdtscp rep_good sep sev sev_es sha_ni skinit smap smca sme smep ssbd sse 
  sse2 sse4_1 sse4_2 sse4a ssse3 stibp succor svm svm_lock syscall tce 
  topoext tsc tsc_scale umip v_spec_ctrl v_vmsave_vmload vgif vmcb_clean vme 
  vmmcall wbnoinvd wdt xgetbv1 xsave xsavec xsaveerptr xsaveopt xsaves 
Repos:
  No active apt repos in: /etc/apt/sources.list 
  Active apt repos in: /etc/apt/sources.list.d/amdgpu.list 
  1: deb https://repo.radeon.com/amdgpu/22.20/ubuntu focal main
  Active apt repos in: /etc/apt/sources.list.d/camel-neeraj-sysmontask-focal.list 
  1: deb http://ppa.launchpad.net/camel-neeraj/sysmontask/ubuntu focal main
  Active apt repos in: /etc/apt/sources.list.d/kdenlive-kdenlive-stable-focal.list 
  1: deb http://ppa.launchpad.net/kdenlive/kdenlive-stable/ubuntu focal main
  Active apt repos in: /etc/apt/sources.list.d/official-package-repositories.list 
  1: deb http://packages.linuxmint.com una main upstream import backport #id:linuxmint_main
  2: deb http://archive.ubuntu.com/ubuntu focal main restricted universe multiverse
  3: deb http://archive.ubuntu.com/ubuntu focal-updates main restricted universe multiverse
  4: deb http://archive.ubuntu.com/ubuntu focal-backports main restricted universe multiverse
  5: deb http://security.ubuntu.com/ubuntu/ focal-security main restricted universe multiverse
  6: deb http://archive.canonical.com/ubuntu/ focal partner
  Active apt repos in: /etc/apt/sources.list.d/protonvpn-stable.list 
  1: deb [signed-by=/usr/share/keyrings/protonvpn-stable-archive-keyring.gpg] https://repo.protonvpn.com/debian stable main
  Active apt repos in: /etc/apt/sources.list.d/radeon-profile-stable-focal.list 
  1: deb http://ppa.launchpad.net/radeon-profile/stable/ubuntu focal main
  Active apt repos in: /etc/apt/sources.list.d/rocm.list 
  1: deb [arch=amd64] https://repo.radeon.com/rocm/apt/5.2 ubuntu main

I tried going into driver manager, and it says everything is up to date. Going into System Settings, then to Network shows no Ethernet option at all. I tried a couple of commands from other threads hoping it would solve my issue. The first command I tried is this:

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sudo apt-get install --reinstall network-manager

This didn't do anything to fix my issue.
The second command I tried was this:

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sudo dhclient eth0

The terminal responded with this:

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Cannot find device "eth0"

I'm 100% certain that the cable is good, as I connected it to another computer and it connected right away. Linux Mint just does not seem to see the Ethernet connection.

Thanks.

[sleeper12]

I'm using the latest kernel.

The latest kernel of Mint 20.3 or 21?

It might help to post the entire:

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inxi -Fxxxrz

[TwoOhFive]

I'm using the latest kernel for 20.3. My Kernel version is 5.15.0-43-generic according to system info.
The output of that command is here:

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System:
  Kernel: 5.15.0-43-generic x86_64 bits: 64 compiler: N/A 
  Desktop: Cinnamon 5.2.7 wm: muffin 5.2.1 dm: LightDM 1.30.0 
  Distro: Linux Mint 20.3 Una base: Ubuntu 20.04 focal 
Machine:
  Type: Desktop System: ASUS product: N/A v: N/A serial: <filter> 
  Mobo: ASUSTeK model: TUF GAMING X570-PRO (WI-FI) v: Rev X.0x 
  serial: <filter> UEFI: American Megatrends v: 3603 date: 03/20/2021 
Battery:
  Device-1: sony_controller_battery_04:98:f3:05:37:0d model: N/A serial: N/A 
  charge: N/A status: N/A 
CPU:
  Topology: 8-Core model: AMD Ryzen 7 3700X bits: 64 type: MT MCP arch: Zen 
  L2 cache: 4096 KiB 
  flags: avx avx2 lm nx pae sse sse2 sse3 sse4_1 sse4_2 sse4a ssse3 svm 
  bogomips: 115201 
  Speed: 2205 MHz min/max: 2200/3600 MHz boost: enabled Core speeds (MHz): 
  1: 2190 2: 1894 3: 2004 4: 2185 5: 2201 6: 1866 7: 2799 8: 2172 9: 2199 
  10: 2200 11: 2200 12: 2199 13: 2200 14: 2200 15: 2184 16: 2160 
Graphics:
  Device-1: AMD Navi 10 [Radeon RX 5600 OEM/5600 XT / 5700/5700 XT] 
  vendor: Tul driver: amdgpu v: kernel bus ID: 0b:00.0 chip ID: 1002:731f 
  Display: x11 server: X.Org 1.20.13 driver: amdgpu,ati 
  unloaded: fbdev,modesetting,radeon,vesa 
  resolution: 1920x1080~165Hz, 1920x1080~60Hz 
  OpenGL: renderer: AMD Radeon RX 5700 XT (NAVI10 DRM 3.42.0 
  5.15.0-43-generic LLVM 12.0.0) 
  v: 4.6 Mesa 21.2.6 direct render: Yes 
Audio:
  Device-1: AMD Navi 10 HDMI Audio driver: snd_hda_intel v: kernel 
  bus ID: 0b:00.1 chip ID: 1002:ab38 
  Device-2: AMD Starship/Matisse HD Audio vendor: ASUSTeK 
  driver: snd_hda_intel v: kernel bus ID: 0d:00.4 chip ID: 1022:1487 
  Device-3: C-Media Blue Snowball type: USB 
  driver: hid-generic,snd-usb-audio,usbhid bus ID: 1-1.2:5 
  chip ID: 0d8c:0005 serial: <filter> 
  Sound Server: ALSA v: k5.15.0-43-generic 
Network:
  Device-1: Intel Wi-Fi 6 AX200 driver: iwlwifi v: kernel bus ID: 04:00.0 
  chip ID: 8086:2723 
  IF: wlp4s0 state: up mac: <filter> 
  Device-2: Intel vendor: ASUSTeK driver: igc v: kernel port: N/A 
  bus ID: 05:00.0 chip ID: 8086:15f3 
  IF: enp5s0 state: down mac: <filter> 
Drives:
  Local Storage: total: 4.74 TiB used: 1.49 TiB (31.4%) 
  ID-1: /dev/nvme0n1 vendor: Western Digital model: WDS250G1B0C-00S6U0 
  size: 232.89 GiB speed: 15.8 Gb/s lanes: 2 serial: <filter> rev: 201000WD 
  scheme: GPT 
  ID-2: /dev/sda vendor: PNY model: CS900 960GB SSD size: 894.25 GiB 
  speed: 6.0 Gb/s serial: <filter> rev: 06B3 scheme: GPT 
  ID-3: /dev/sdb vendor: Western Digital model: WD40EZAZ-00SF3B0 
  size: 3.64 TiB speed: 6.0 Gb/s rotation: 5400 rpm serial: <filter> 
  rev: 0A80 scheme: GPT 
Partition:
  ID-1: / size: 227.68 GiB used: 95.77 GiB (42.1%) fs: ext4 
  dev: /dev/nvme0n1p2 
Sensors:
  System Temperatures: cpu: 41.0 C mobo: N/A gpu: amdgpu temp: 64 C 
  Fan Speeds (RPM): N/A gpu: amdgpu fan: 0 
Repos:
  No active apt repos in: /etc/apt/sources.list 
  Active apt repos in: /etc/apt/sources.list.d/amdgpu.list 
  1: deb https://repo.radeon.com/amdgpu/22.20/ubuntu focal main
  Active apt repos in: /etc/apt/sources.list.d/camel-neeraj-sysmontask-focal.list 
  1: deb http://ppa.launchpad.net/camel-neeraj/sysmontask/ubuntu focal main
  Active apt repos in: /etc/apt/sources.list.d/kdenlive-kdenlive-stable-focal.list 
  1: deb http://ppa.launchpad.net/kdenlive/kdenlive-stable/ubuntu focal main
  Active apt repos in: /etc/apt/sources.list.d/official-package-repositories.list 
  1: deb http://packages.linuxmint.com una main upstream import backport #id:linuxmint_main
  2: deb http://archive.ubuntu.com/ubuntu focal main restricted universe multiverse
  3: deb http://archive.ubuntu.com/ubuntu focal-updates main restricted universe multiverse
  4: deb http://archive.ubuntu.com/ubuntu focal-backports main restricted universe multiverse
  5: deb http://security.ubuntu.com/ubuntu/ focal-security main restricted universe multiverse
  6: deb http://archive.canonical.com/ubuntu/ focal partner
  Active apt repos in: /etc/apt/sources.list.d/protonvpn-stable.list 
  1: deb [signed-by=/usr/share/keyrings/protonvpn-stable-archive-keyring.gpg] https://repo.protonvpn.com/debian stable main
  Active apt repos in: /etc/apt/sources.list.d/radeon-profile-stable-focal.list 
  1: deb http://ppa.launchpad.net/radeon-profile/stable/ubuntu focal main
  Active apt repos in: /etc/apt/sources.list.d/rocm.list 
  1: deb [arch=amd64] https://repo.radeon.com/rocm/apt/5.2 ubuntu main
Info:
  Processes: 390 Uptime: 27m Memory: 31.25 GiB used: 2.15 GiB (6.9%) 
  Init: systemd v: 245 runlevel: 5 Compilers: gcc: 9.4.0 alt: 9 Shell: bash 
  v: 5.0.17 running in: gnome-terminal inxi: 3.0.38

[sleeper12]

The driver is there:

Device-2: Intel vendor: ASUSTeK driver: igc v: kernel port: N/A
bus ID: 05:00.0 chip ID: 8086:15f3
IF: enp5s0 state: down mac: <filter>

Did you try reinserting the ethernet cable? You can also try:

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 sudo modprobe -r igc && sudo modprobe igc && sudo systemctl restart network-manager.service 

[TwoOhFive]

Hello. I've tried reinserting the network cable, but that didn't help me.
I executed the command you gave, but it didn't seem to help me much. Still unable to connect using Ethernet.

[HaveaMint]

brain dead on my part. edited this post. NVM

[sleeper12]

Can you enable it In your panel on the lower right when you click the network icon?

Also, try:

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 sudo ifconfig enp5s0 up 

[TwoOhFive]

The only option I see when I click on the network icon is to turn off/on wireless network, and to go into network settings and network connections.
Also, I tried that command you gave, and from what I can tell it didn't seem to do anything at all.

[sleeper12]

I'm about out of ideas then, except maybe restart your router/modem & machine.

[keithf]

I had a similar problem in using timeshift to recover 20.3 after a failed upgrade to 21 (due to a hardware fault) and I found out that that timeshift had not restored the previous versions of two network related files:
/usr/lib/systemd/system-generators/netplan
and
/usr/lib/netplan/generate
I manually copied them back from the snapshot and that fixed my problem of getting a working 20.3 system back with Ethernet connection. The upgrade went successfully after that.

[mak]

I have the same issue. Updated to 21, fractional scaling didn't work anymore, so i reverted back via Timeshift.

That went well except for the ethernet issue. I've tryed 3 different kernels, same thing. Does not detect connection. Unfortunately i don't have wi-fi on this pc so i'm stuck.

Would really appreciate some tips.

-I've tryed what @keithf mentioned, but those files are fine on my pc.

[Jebril]

I have the same issue. Updated to 21, fractional scaling didn't work anymore, so i reverted back via Timeshift.

That went well except for the ethernet issue. I've tryed 3 different kernels, same thing. Does not detect connection. Unfortunately i don't have wi-fi on this pc so i'm stuck.

Would really appreciate some tips.

-I've tryed what @keithf mentioned, but those files are fine on my pc.

They are not fine, replace them with your backup files this is the issue, Timeshift is not restoring those files correctly. It worked for me I am linking keithf's post to my thread as solution because it is the current issue.

What I'd like to know for future reference is how to manually add and enable our Ethernet connection because it seems ridiculous that no one on this whole forum knows how to do something that simple on Linux Mint lol. If we had no previous back up files how do we just add and enable our ethernet connection if it gets messed up? This shouldn't be this hard...

[mak]

I have the same issue. Updated to 21, fractional scaling didn't work anymore, so i reverted back via Timeshift.

That went well except for the ethernet issue. I've tryed 3 different kernels, same thing. Does not detect connection. Unfortunately i don't have wi-fi on this pc so i'm stuck.

Would really appreciate some tips.

-I've tryed what @keithf mentioned, but those files are fine on my pc.

They are not fine, replace them with your backup files this is the issue, Timeshift is not restoring those files correctly. It worked for me I am linking keithf's post to my thread as solution because it is the current issue.

What I'd like to know for future reference is how to manually add and enable our Ethernet connection because it seems ridiculous that no one on this whole forum knows how to do something that simple on Linux Mint lol. If we had no previous back up files how do we just add and enable our ethernet connection if it gets messed up? This shouldn't be this hard...

I did replace those files from the last snapshot. It didn't work.
I have a usb-wireless adapter now and wireless connection works fine.

[m_fife]

I also experienced this issue, I can confirm that replacing those files fixes the issue.

It appears the copy correctly, exact same metadata and size. For whatever reason overwriting them from backup fixes the issue.

[nohintofmint]

Thanks to all for the help here; I had the same issue with ethernet, and re-copying the 2 files shown earlier in this thread solved my problem. I had tried the mintupdate tool, went through the laborious removal of several orphan PPAs, but when Synaptics then confronted me with conflicts I gave up. On using TimeShift to return to 20.3, I then noted the above problems with no ethernet recognition, and a netplan error on boot.

Like a previous post, TimeShitf DID "restore" the two files in systemd, and their date/time/size profiles looked identical, but you should copy from the backup manually anyway (I did not do a file compare between the TimeShift files and what it put on my machine on restore; perhaps should have done this). I'd also like to point out that the one file is a link to another, hence both have to be reinstated. Makes me wonder how many other links weren't restored properly by TimeShift.

[antcj]

I had the same issue.
I am just seeing this post for the first time, after a fix i found here:
https://askubuntu.com/questions/71159/n ... ot-managed

ill copy the relevant bits:
Ubuntu installs a config file that sets most devices unmanaged:
/usr/lib/NetworkManager/conf.d/10-globally-managed-devices.conf:
[keyfile]
unmanaged-devices=*,except:type:wifi,except:type:gsm,except:type:cdma

To disable this, You can create a blank file with the same name in /etc:

sudo touch /etc/NetworkManager/conf.d/10-globally-managed-devices.conf
and then:
sudo systemctl restart NetworkManager

[KirK86]

Hi there!

Please, greet me warm in your club. Same story: upgraded to 21, then for a reason restored from Timeshift snapshot and got networking failure (wired, not wireless). Both solutions mentioned here fix the issue. But for me I decided to go with copying *lib* files just because I feel it more correct since '10-globally...' file wasn't there and everything worked fine.

Thank you all for your curiosity and for sharing your findings. But there are two questions I still aware of:
1) Just curious: how all this connected. I just like things to be more clear. I mean those libs and files and what the heck is going on under the hood
2) Even more important: what else TimeShift makes wrong? Was any other files broken? How can we trust this tool in future?

Updated: I found VirtualBox doesn't start saying libssl.so3 is missing. Reinstalled both Virtualbox and libssl (apt get install --reinstall) and now it's okay. What next will pop up? Fell's bad.

PS Sorry for English, I'm not a native speaker

[SMG]

Thank you all for your curiosity and for sharing your findings. But there are two questions I still aware of:
1) Just curious: how all this connected. I just like things to be more clear. I mean those libs and files and what the heck is going on under the hood
2) Even more important: what else TimeShift makes wrong? Was any other files broken? How can we trust this tool in future?

Welcome to the forum, KirK86.

A bug report Ethernet not working after restoring with Timeshift: netplan files are failed to be restored #51 has been created. This problem has happened to many people, but it seems that not many have reported it.

I am not aware of other Timeshift snapshot problems when upgrading to LM21.