use right alt+ shift+e for ऐ and right alt+ shift+o for औ, i.e. you have to switch to level 3 (R alt+ is the default for doing so, you can change it to any other key combination as well by going to keyboard preferences>layouts>options)
more help here http://indlinux.org/wiki/index.php/BolNagri -- ubuntu-in mailing list ubuntu-in@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-in
