> Under Debian/unstable, I can't connect to eduroam due to the following
> reason:
AFAIK, while "the eduroam" looks like one thing it's just a bunch of
local wifi networks, each one administered&managed mostly independently
and with different configurations. By and large, if you can connect to
eduroam at one place it's likely it'll also work elsewhere but it's not
always the case.
Stefan