Category Archives: Linux

Firewalld breaks libvirt networking on Ubuntu 18.10

After upgrading to Kubuntu 18.10, my virtual machine was no longer able to connect to the Internet. It turned out that this problem had already been reported on Fedora:

https://bugzilla.redhat.com/show_bug.cgi?id=1623868

Once I changed the firewalld configuration (etc/firewalld/firewalld.conf) to use the iptables backend as suggested in that bug report, the virtual machine could connect to the Internet again.

Power Button on Debian Wheezy with Gnome

I upgraded a desktop machine from Debian Squeeze to Debian Wheezy. After the upgrade, the power button was mapped to a suspend action, instead of a shutdown as in Debian Squeeze.

In order to map the power button to a shutdown action, I had to do the following;
1) Set org.gnome.settings-daemon.plugins.power to 'nothing' by means of dconf (for all users)
2) Add a new section [org.gnome.settings-daemon.plugins.power] with the line button-power='nothing' to /etc/gdm3/greeter.gsettings