I marked the bug incomplete, when asking for additional information. Which is a normal bug processing procedure. This happened _before_ your comment #4 and #5.
-- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to ifupdown in Ubuntu. https://bugs.launchpad.net/bugs/1905472 Title: Something starts dhcclient for every intrface on boot Status in aoetools package in Ubuntu: New Status in ifupdown package in Ubuntu: Invalid Status in initramfs-tools package in Ubuntu: New Status in netplan.io package in Ubuntu: Invalid Bug description: After upgrade frpm 18LTS to 20LTS I've lost the network. Network is managed by ifupdown Netplan is not installed Network manger is disabled (masked) Yet, at boot, SOMETHING starts dhclient for every network interface. This has disastrous results - dhcp request succeeds on physical interface that is a base for a vlan-based interface, causing real dhcp request on to fail on vlan interface. Expected behavior - dhclient starts only for interfaces marked as dhcp in /etc/network/interfaces . ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: isc-dhcp-client 4.4.1-2.1ubuntu5 ProcVersionSignature: Ubuntu 5.8.0-29.31~20.04.1-generic 5.8.14 Uname: Linux 5.8.0-29-generic x86_64 NonfreeKernelModules: nvidia_modeset nvidia ApportVersion: 2.20.11-0ubuntu27.12 Architecture: amd64 CasperMD5CheckResult: skip Date: Wed Nov 25 00:07:45 2020 SourcePackage: isc-dhcp UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/aoetools/+bug/1905472/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp