>> >> in a network script, I was wondering if 'it' was waiting for a ipv6 >> address or so > You may need to disable it in the kernel module, (ipv6.disable=1 or > smething like that) I never had to do that. I replace some networking stuff (router/switch) every seemed to have survived the transition, except 3 RPIs (it should just get an IP with dhcp/wireless, but somehow it started complaining about wlan0 >> >> >>>> >>>> >>>> (I tried to create a new centos image on an SD, but somehow >>>> thatdoesn't work. where is the latest working version of it?) >>> Which image doesn't work? All the latest versions are in >>> http://mirror.centos.org/altarch/7/isos/armhfp/ >> >> That is the one for RPI3, right? Does that work on the RPI4 too? > Those are for both, that is why I asked. In fact, in the link there > are 3 images that could boot in rpi3 (the generic one, with a normal > kernel, the rpi-minimal, with kernel from rpi foundation, and the > rpi-minimal-4 which also works on the raspberrypi4) good to know, I wondered what the differences are >> >> >>>> >>>> >>>> is there a way to fix this wlan0 error ? >>> That depends on how ipv6 is disabled, but even so, that looks more >>> like a warning than an actual error. >> >> >> That's what I thought, just wondering if it actually is. > Since you're not actually using ipv6, you can ignore it right, on "regular machines" when configuring network stuff, I disable it thanks, Ron