Muti-series Column 2D + Line Dual Y Axis broken for showName

Try this

        if (($i%$spacing) == 0) {
          $info->attributes['showName'][$row['name']] = 1;
        }
        else {
          $info->attributes['showName'][$row['name']] = 0;
        }

It works for regular graphs but does not for Multi-series.

The solution is to modify fusioncharts.module line 724
Before

    foreach ($categories as $this_category) {
      $str_xml .= "<category name='". fusioncharts_entities(trim($this_category)) ."' ".$showname."/>\n";
    }

After

    foreach ($categories as $this_category) {
       if (isset($attributes['showName'][$this_category])) {
         $showname = "showName='{$attributes['showName'][$this_category]}'";
       }
      $str_xml .= "<category name='". fusioncharts_entities(trim($this_category)) ."' ".$showname."/>\n";
    }