One of the biggest problems that ROM cooks are finding in Android 4.0 (Ice Cream Sandwich) It is to add the graphics acceleration hardware. Available for Gingerbread graphics drivers should be changed completely, and this is one of the reasons for the delay of CyanogenMod 9.
A few days ago CyanogenMod published a scheme to find out the possibility that our device receives CyanogenMod 9. In this scheme, we see that if our device has a GPU that has no device updated officially to Ice Cream Sandwich possibilities of having the latest version of Android are reduced to 5%.
But this will change for many devices, as Qualcomm, at the request of the chefs of ROMS, It has released drivers for Ice Cream Sandwich of their Adreno GPU 2XX, thus making it possible for more Android devices they can enjoy Ice Cream Sandwich with your graphics hardware acceleration to 100%.
Now for example terminals such as the Nexus One, HTC Desire or any device with Adreno 200 or higher have much greater potential for CyanogenMod 9 or enjoy any ROM based on Android 4.0 with a good graphics acceleration. It has been a great detail from Qualcomm to publish their drivers adapted to Ice Cream Sandwich to facilitate working cooks.