** Description changed:
- Here is the updated bug report with your exact phrasing:
-
- ---
-
- ### **Bug Title**
-
- Internet connectivity does not connect automatically at boot when
- booting a VM clone with the NIC enabled (installed with NIC disabled) —
- works in Ubuntu MATE
-
- ---
-
- ### **Description**
+ ### Description
When installing Ubuntu (26.04 and 26.10) inside a Virtual Machine with
the Network Interface Card (NIC) disabled during installation, powering
off the VM, cloning it, and subsequently turning on the NIC in the clone
results in a system where internet connectivity does not connect
automatically at boot.
In contrast, Ubuntu MATE 26.10 handles this scenario correctly, and
internet connectivity works out of the box when the NIC is enabled on
the clone.
---
- ### **Steps to Reproduce**
+ ### Steps to Reproduce
1. Create a Virtual Machine with the NIC disabled or disconnected.
2. Complete the installation of Ubuntu 26.04 or 26.10 inside the VM.
3. Power off the Virtual Machine and create a clone of it.
4. Enable the NIC on the cloned VM, then power it on.
5. Check if internet connectivity connects automatically at boot.
---
- ### **Expected Result**
+ ### Expected Result
Internet connectivity should connect automatically at boot once the NIC
is turned on in the cloned VM, consistent with the behavior observed in
Ubuntu MATE.
---
- ### **Actual Result**
+ ### Actual Result
Internet connectivity does not connect automatically at boot when booted
with the NIC enabled.
---
- ### **Additional Information / Workaround**
+ ### Additional Information / Workaround
- This issue does **not** occur in Ubuntu MATE 26.10.
+ This issue does not occur in Ubuntu MATE 26.10.
As a temporary workaround, the following script can be used to resolve
the issue:
```bash
if grep -q '^ID=ubuntu' /etc/os-release && \
- grep -q '^VERSION_ID="26\.' /etc/os-release && \
- grep -Eq '^Ubuntu [0-9]' /var/log/installer/media-info 2>/dev/null; then
- IFACE=$(ip -4 route show default | awk '{print $5}' | head -n1)
- [ -z "$IFACE" ] && IFACE="enp1s0"
+ grep -q '^VERSION_ID="26\.' /etc/os-release && \
+ grep -Eq '^Ubuntu [0-9]' /var/log/installer/media-info 2>/dev/null; then
+ IFACE=$(ip -4 route show default | awk '{print $5}' | head -n1)
+ [ -z "$IFACE" ] && IFACE="enp1s0"
- # Check if DHCP is already configured
- DHCP4_SET=$(netplan get ethernets."$IFACE".dhcp4 2>/dev/null)
- DHCP6_SET=$(netplan get ethernets."$IFACE".dhcp6 2>/dev/null)
+ # Check if DHCP is already configured
+ DHCP4_SET=$(netplan get ethernets."$IFACE".dhcp4 2>/dev/null)
+ DHCP6_SET=$(netplan get ethernets."$IFACE".dhcp6 2>/dev/null)
- if [ "$DHCP4_SET" != "true" ] || [ "$DHCP6_SET" != "true" ]; then
- sudo netplan set ethernets."$IFACE".dhcp4=true
- sudo netplan set ethernets."$IFACE".dhcp6=true
- sudo netplan generate
- sudo netplan apply
+ if [ "$DHCP4_SET" != "true" ] || [ "$DHCP6_SET" != "true" ]; then
+ sudo netplan set ethernets."$IFACE".dhcp4=true
+ sudo netplan set ethernets."$IFACE".dhcp6=true
+ sudo netplan generate
+ sudo netplan apply
- # Wait for WAN and DNS so premature apt runs don't fail InRelease
checks
- until wget -q --spider --timeout=1 http://archive.ubuntu.com; do
- sleep 1
- done
- fi
+ # Wait for WAN and DNS so premature apt runs don't fail InRelease
checks
+ until wget -q --spider --timeout=1 http://archive.ubuntu.com; do
+ sleep 1
+ done
+ fi
- sudo apt-get update
+ sudo apt-get update
fi
```
** Summary changed:
- Netplan DHCP configuration missing at boot when installed with NIC disabled
+ Netplan fails to configure DHCP on first boot when installed with NIC
disabled then enabled
--
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Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/2170258
Title:
Netplan fails to configure DHCP on first boot when installed with NIC
disabled then enabled
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https://bugs.launchpad.net/ubuntu/+bug/2170258/+subscriptions
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