Switchable graphics for the ATI-based Acer Timeline laptops

A very interesting post in ubuntuforums to be able to switch off the ATI graphics card on ATI-based Acer Timeline laptops:
http://ubuntuforums.org/showpost.php?p=7933876&postcount=11

Updated counts for the different groups:

• Sony Vaio Z-series and Linux -- 136 active memberships
• Acer Aspire Timeline 3810T/4810T and Linux -- 62 active memberships
  
• Dell Latitude E4200/E4300 and Linux -- 46 active memberships
• Lenovo ThinkPad X301 and Linux -- 40 active memberships
• Toshiba Portege R500-R600 and Linux -- 13 active memberships
• Samsung X360 and Linux -- 13 active memberships
  
• Dell Adamo and Linux -- 3 active memberships
• HP Pavilion dm3 and Linux -- soon