Anyone managed to install ImageMagick with Linux, PHP Version 5.5.9-1ubuntu4.7

The following works fine:

PHP Code:

 $thumbnail = new Imagick($pix);
  $wid = 128;
  $thumbnail->thumbnailImage( $wid, 0 );
  $thumbnail->enhanceImage();

  $thumbnail->sharpenimage(1,1,Imagick::CHANNEL_ALL); //$radius, $sigma, $channel);
  $ok = $thumbnail->writeImage( 'thumbs/'.$thb ); 


Problem - cannot use CodeIgniter  Image Library: 
The $config['library_path'] is incorrect.



Tried the following without success:

PHP Code:

// PHP Version 5.5.9-1ubuntu4.7
$paths = array 
(
  '/opt/local/bin',
  '/opt/local/bin/',
  '/usr/bin/mogrify',
  '/usr/bin/mogrify/',
  '/usr/bin/convert',
  '/etc/php5/apache2/conf.d/',               // 20-imagick.ini
  '/etc/php5/apache2/conf.d/20-imagick.ini', // extension=imagick.so
  '/etc/ImageMagick',
  '/etc/ImageMagick/',
  '/usr/include/php5/ext/imagick',
  '/var/lib/dpkg/info/php5-imagick.prerm',
);
$path = $paths[0..10]); // tried all 10 options :-(
echo '$path --> ' .$path .'<br />';

$this->load->library('image_lib');

$config['image_library'] = 'ImageMagick'; // $config['image_library']     = 'imagick';
$config['library_path']    = $path;
...
...
if ( ! $this->image_lib->resize())
{
   echo '<h1 style="color:red">' .$this->image_lib->display_errors() .'</h1>';
}
// Output
   Image processing failed. 
   Please verify that your server supports the chosen protocol 
   and that the path to your image library is correct.