Is this still reproducible with v244? In case you are using stable, there is a v244 backport for buster available.
On Fri, 24 Jan 2020 21:23:17 -0500 Dragan Tubic <dragan.tu...@gmail.com> wrote: > I have the same problem > > Failed to rename network interface 2 from 'enxXXXXXXXXXXX to 'wan': > Device or resource busy > > I noticed the following line in the journal that before udevd fails, > > systemd-networkd[293]: enxXXXXXXXXXXX : IPv6 successfully enabled > > so I tried to disable ipv6 in > /etc/sysctl.conf > by setting > > net.ipv6.conf.all.disable_ipv6 = 1 > > net.ipv6.conf.default.disable_ipv6 = 1 > > net.ipv6.conf.lo.disable_ipv6 = 1 > > which after rebooting solved the problem. Not sure if I stumbled upon > the right solution but I hope it helps. > >
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