Install in this order when you set up Libretto L1/L2 drivers. 

 1. video driver 
 2. audio driver 
 3. modem driver 
* 4. TOSHIBA COMMON MODULE 
* 5. TOSHIBA DISPLAY POWER SAVER 
* 6. TOSHIBA POWER SAVER 
* 7. TOSHIBA UTILITY 

--> Please install Toshiba Common Module before Display Power saver and Toshiba Utility.