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It won't UNCRASH or SHUT OFF! It's like... stuck on the desktop, I can enter the machine, but not control it. Ideas?


AHAHAH I forgot the Ctrl+Alt+Bksp thingy. I did it and it shut off. Finally after like an hour... Jeez. Let's see how it likes the crash...

Okay, works fine. I feel proud that I remembered that after 6 months of no Linux use... *pats self on back*

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Dani AI

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A compact, practical checklist for restoring an Ubuntu guest's network after an abrupt VM reset. Useful diagnostics to run inside the guest, followed by common VM-side settings to verify. This complements 's observations and focuses on reproducible, low-risk fixes.

Basic in-guest checks and quick fixes (run these to see status and reset services):

ip addr show
nmcli device status
sudo systemctl restart NetworkManager
sudo service network-manager restart
sudo dhclient -v <iface>
rfkill list
sudo rfkill unblock all
sudo lshw -C network
dmesg | tail -n 50
journalctl -u NetworkManager -n 200

VM/host-side items to verify

  • Confirm the VM network adapter is enabled and the virtual cable is connected in the VM settings.
  • Check adapter mode: NAT is the simplest and most robust; bridged mode uses the host interface and can be flaky with some Wi-Fi adapters — switch to NAT to test.
  • If using USB Wi-Fi dongles passed through to the guest, reattach the device to the VM (host may have grabbed it after the crash).
  • For VirtualBox/VMware: ensure the adapter type matches the guest driver and that "Connect at power on" / "Cable connected" is checked.

If the interface appears but no packets flow, the guest may need DHCP renewed (dhclient above) or a driver/firmware load. If the NIC is listed as UNCLAIMED or missing, inspect the lshw output and install the appropriate firmware/driver from Ubuntu repositories. If problems persist after these steps, a host reboot or recreating the VM network adapter often clears stale host-side locks.

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Okay, the only "side-effect" of the crash is that my Ubuntu wireless doesn't work now, even though the VM says "Active Ethernet"

Help?

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