I've discovered a similar issue just yesterday. I hunted it down and found
that the cause, for me at least, was in the static NetworkManager configuration.
NetworkManager configuration now marks *all* interfaces as unmanaged *except*
WiFi and Cellular, basically all non-wireless interfaces are prevented from
being activated. Apparently some genius at Ubuntu decided nobody uses wired
connections.
In /usr/lib/NetworkManager/conf.d/10-globally-managed-devices.conf, check the
line that starts with "unmanaged-devices". If it reads as follows, consider
modifying or commenting out the line.
unmanaged-devices=*,except=type:wifi,except=type:gsm,except=type:cdmaIf you make changes, run "systemctl reload NetworkManager" to update the running daemon. On 2022-09-23 12:04 PM, T Zack Crawford via PLUG-discuss wrote: > I am very interested in the answer because my desktop does the same thing if > I tell it to hibernate, boot into my windows dual boot, and reboot back into > linux. I can regain network access again by hibernating again and booting > back into linux directly (no windows). Pretty annoying because it takes a > solid 2-5 minutes to shut down when hibernating. At least it still does the > job, just with delay. > > This only happens if I try hibernating and then boot into windows (not full > shutdown, not hibernate and boot directly to linux). It has always happened > since I enabled hibernation (arch wiki instructions). Having Systemd restart > NetworkManager does nothing. Setting up a new network configuration with > networkmanager does not solve it. This is with my motherboard ethernet and my > wireless USB adapter. I spent some good energy trying to figure it out, but > never did. > > > Did you update kernels today? What if you downgrade? > > Put the solution as a boot script. Or at least bash profile instead of run > commands (otherwise it will run every time you spawn a terminal shell) > > Sep 23, 2022 11:14:35 Jim via PLUG-discuss <plug-discuss@lists.phxlinux.org>: > >> A few months ago my Dell Optiplex 7010 running Ubuntu 20.04 started booting >> up without the network. I'd reboot the machine and the network was there. >> If I shut down the machine and turned it on again, no network. I thought >> something was wrong with the built in ethernet adapter, so I bought a usb >> adapter, disabled the built in one and the problem went away until today. >> Now it's happening with the usb ethernet adapter. Rebooting the machine >> fixes the problem gets the network up and running. If I start with a cold >> boot and reboot at the grub screen, I get the network. I have 3 SSDs and 2 >> HDDs. I have the same video card that I had before this problem first >> showed itself. It's a GeForce GT 710. >> >> I looked online and found something telling of other people who have had >> this problem. They disconnected video cards and went back to the built in >> video (display port), and removed hard drives that had been added later and >> this fixed the problem. The ultimate solution was to replace the power >> supply. I disconnected one SSD and the 2 HDDs. I don't have anything that >> can use a display port, so I left the video card in place. All I had >> connected were 2 SSDs. One it boots from and my home directory is on the >> other. The problem still showed itself when I booted the machine, so I shut >> down and plugged in everything again. This thing has a 240 watt power >> supply. Do power supplies go band in such a way they don't produce the >> amount of power they used to? >> >> Any ideas what it might be? Is there a command that would tell the system >> to set up the network again? If there is, I could put it in the .bashrc >> until I get this fixed. >> >> Thanks >> >> --------------------------------------------------- >> PLUG-discuss mailing list: PLUG-discuss@lists.phxlinux.org >> To subscribe, unsubscribe, or to change your mail settings: >> https://lists.phxlinux.org/mailman/listinfo/plug-discuss > --------------------------------------------------- > PLUG-discuss mailing list: PLUG-discuss@lists.phxlinux.org > To subscribe, unsubscribe, or to change your mail settings: > https://lists.phxlinux.org/mailman/listinfo/plug-discuss >
signature.asc
Description: OpenPGP digital signature
--------------------------------------------------- PLUG-discuss mailing list: PLUG-discuss@lists.phxlinux.org To subscribe, unsubscribe, or to change your mail settings: https://lists.phxlinux.org/mailman/listinfo/plug-discuss
