(Note: New bug #2055776 opened a couple hours ago that looks related to
this issue)
For the following answers to your queries, I used both the new and
previous versions of dnsmasq-base with identical results:
What's the contents of the /etc/dnsmasq.d directory?
There is a symbolic link in this dir: libvirt-daemon ->
/etc/dnsmasq.d-available/libvirt-daemon
sudo cat /etc/dnsmasq.d-available/libvirt-daemon
bind-interfaces
except-interface=virbr0
sudo cat /etc/libvirt/qemu/networks/default.xml
<!--
WARNING: THIS IS AN AUTO-GENERATED FILE. CHANGES TO IT ARE LIKELY TO BE
OVERWRITTEN AND LOST. Changes to this xml configuration should be made using:
virsh net-edit default
or other application using the libvirt API.
-->
<network>
<name>default</name>
<uuid>2503f137-xxxx-xxxx-a9a0-3f709e7da000</uuid>
<forward mode='nat'/>
<bridge name='virbr0' stp='on' delay='0'/>
<mac address='52:54:xx:xx:c7:d9'/>
<ip address='192.168.122.1' netmask='255.255.255.0'>
<dhcp>
<range start='192.168.122.2' end='192.168.122.254'/>
</dhcp>
</ip>
</network>
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https://bugs.launchpad.net/bugs/2055455
Title:
dnsmasq-base causes network device virbr0 to shut down
Status in dnsmasq package in Ubuntu:
New
Bug description:
Installing dnsmasq-base v2.90-0ubuntu0.22.04.1 causes network device
virbr0 to shut down during the boot-up process. Device virbr0 is
installed by the libvirtd daemon. libvirtd gets an unexpected error
when dnsmasq is called and then the address record for virbr0 is
withdrawn.
This problem goes away when reverting back to dnsmasq-base v2.86-1.1
The attached text file provides relevant status reports which
illustrate this problem. (status is shown for the system when using
dnsmasq-base v2.90-0ubuntu0.22.04.1 when the problem occurs and then
when the system operates correctly using dnsmasq-base v2.86-1.1)
ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: dnsmasq-base 2.90-0ubuntu0.22.04.1
ProcVersionSignature: Ubuntu 5.15.0-60.66-generic 5.15.78
Uname: Linux 5.15.0-60-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu82.5
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: ubuntu:GNOME
Date: Thu Feb 29 10:29:20 2024
InstallationDate: Installed on 2018-10-08 (1970 days ago)
InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64
(20180725)
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_US.UTF-8
SHELL=/bin/bash
SourcePackage: dnsmasq
UpgradeStatus: No upgrade log present (probably fresh install)
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