I tried every thing I can think of, official Microsoft ODBC Driver for SQL Server, FreeTDS, etc.... I'm able to connect to the SQL Server DB from the terminal (isql,sqsh) I can use PostgreSQL's Foreign Data Wrapper to connect PG and MSSQL, but I can't connect QGIS. I get the same error:
Driver not loaded Driver not loaded
How do I connect linux QGIS to SQL Server?