@boot0user I agree with you. The best workaround for now is to update kernel to Vivid!
# Physical Server (with EFI): sudo apt-get -y purge linux-{headers,image}-3.16.0-48-generic sudo apt-get -y install linux-signed-generic-lts-vivid sudo reboot uname -r # 3.19.0-26-generic sudo apt-get -y purge linux-signed-generic-lts-utopic sudo apt-get -y purge linux-{image,headers}-generic-lts-utopic # Physical Server (without EFI, but signed is also fine): sudo apt-get -y purge linux-{headers,image}-3.16.0-48-generic sudo apt-get -y install linux-generic-lts-vivid sudo reboot uname -r # 3.19.0-26-generic sudo apt-get -y purge linux-generic-lts-utopic sudo apt-get -y purge linux-{image,headers}-generic-lts-utopic # Virtual Server: sudo apt-get -y purge linux-{headers,image,image-extra}-3.16.0-48-generic sudo apt-get -y install linux-virtual-lts-vivid sudo reboot uname -r # 3.19.0-26-generic sudo apt-get -y purge linux-virtual-lts-utopic sudo apt-get -y purge linux-{image,headers}-virtual-lts-utopic # (optional) # If you want to clean old kernels after the reboot (issue 1267059, 1089195) : dpkg --get-selections | awk '/linux-(headers|image)-[0-9]\./ { print $1 }' \ | sort -r -V -t- -k3 | tail -n+4 \ | grep -v "$(uname -r | sed -e 's/-generic//')" \ | xargs -r apt-get -qq -y purge -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1492146 Title: igb Detected Tx Unit Hang To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-lts-utopic/+bug/1492146/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs