Problem with time series, postgresql backend grafana 9.3.6

Just having updated my grafana installation from 9.0.x to the 9.3.6, all existing dahsboards works fine, but I am not able to create a new dashboard with metrics.

Doing a query like

select checktime as time, parameter as metric, value
from table
where fields are what I need
order by 1,2

I will only get one data series, even though there are a number of different parameter values. Even if I copy and paste a query from an existing panel, it will not work. I have looked through all settings, but I am not spotting anything obvious.Is this a bug or have I overlooked something? According to PostgreSQL data source | Grafana documentation, what I am doing should work.