This behavior is not rPi-specific and affects Netplan in general. This happens when configuring an optional wifis entry for a Wi-Fi adapter that may not be present at boot, such as a Wi-Fi dongle.
- The following user reported it on Ubuntu Desktop 18.04 and 20.04: https://bugs.launchpad.net/netplan/+bug/1951651 (marked as duplicate) - I encountered it on Ubuntu Core 20: https://forum.snapcraft.io/t/ubuntu-core-20-boot-delayed-by-missing-wi-fi-usb-dongle-despite-optional-true-netplan-config/27403 I got a promising reply on the Snapcraft forum thread linked above (direct link to the reply: https://forum.snapcraft.io/t/ubuntu- core-20-boot-delayed-by-missing-wi-fi-usb-dongle-despite-optional-true- netplan-config/27403/5). The relevant section is: > The optional: true is a valid flag, but it only handles the waiting for the > network to come up and be configured. The timeout we’re observing here seems > to come from the netplan-wpa-wlx0123456789ab.service unit waiting for the > sys-subsystem-net-devices-wlx0123456789ab.device hardware to become > available, though, but that does not exist if the dongle is unplugged. > > According to https://github.com/systemd/systemd/issues/4413 1 we might need > to change the Requires=sys-subsystem-net-devices-wlx0123456789ab.device > dependency to something like > Requisite=sys-subsystem-net-devices-wlx0123456789ab.device (I’m not sure > about the side-effects, tho). There's a reproduction scenario in the original post on the Snapcraft forum as well. ** Bug watch added: github.com/systemd/systemd/issues #4413 https://github.com/systemd/systemd/issues/4413 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1906646 Title: Timed out waiting for device /subsystem/net/devices/wlan0 To manage notifications about this bug go to: https://bugs.launchpad.net/netplan/+bug/1906646/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
