psql in version 9.1 connect to server 9.3 get the same error as above. => dpkg -l | grep libpq ii libpq5 9.1.13-0wheezy1 amd64 PostgreSQL C client library the other I cant say, now thats ii libpq5:amd64 9.4~beta1-2.pgdg70+1 amd64 PostgreSQL C client library Am 15.07.2014 16:33, schrieb Adrian Klaver: > On 07/15/2014 07:17 AM, basti wrote: >> Hello Adrian, >> >> Yes I use the correct cluster. >> >> password authentication failed for user "testuser" ... >> is a line from the postgres log >> >> Yes I know what "trust" mean. >> >> psql in version 9.3 can connect without error, >> psql in version 9.1 connect to server 9.3 get the same error as above. > > That would seem to indicate that you have a version issue with libpq. > > What does dkpg show for installed versions of libpq? > >> >> I have done the setup. >> And I don't use ADO for this test. >> >> I have also test >> >> Postgres 9.1 and Postgres 9.4 both work with auth-method md5, except >> postgres 9.3 discuss there. >> >> It takes a round 5 hours to find this "error". > > What exactly does that mean? > >> If anybody has the same problem be warned. >> >> Regards, >> basti >> > >