I have a feeling that the xorg in Felicia (7.4) may not be compatible with the 2.6.24 kernel
Husse, is right. I have seen these same problems posted on the Ubuntu forum. I have seen where people are using an earlier version of the kernel to solve this problem and the main problem is with the restricted modules. The restricted modules are supposed to be updated to address these problems but who knows when we will see the updated package. A possible but risky solution might be to enable the proposed repo and see what is available there. Before taking any risks, look in Launchpad to see how this issue is progressing. Launchpad would be the best bet because someone has most likely come up with a solution but it has not made it into the main repos yet.