I just did it but nothing changed..still shows me 128 mb.
This message was posted on behalf of Intel Corporation
The minimum and maximum amount of share memory for graphics is customized by the laptop manufacturers. If BIOS option is not available and registry option does not work, it will be necessary to get in contact with your laptop manufacturer and confirm the maximum amount of share memory.
In some laptops if you add more RAM memory, the system allows to share more memory to the graphics. (only pc manufacturer) can confirm this.