[ltp] Xorg doesn't work since Debian Wheezy --> Jessie update

[alfon]

Hi,
I recently updated Debian on my ThinkPad X31. After update, Xorg
system doesn't work, it seems than no recognize the device driver.

With Kernel Mode Settings (KMS), the Radeon RV100 card works again (I
did that putting radeon.modeset = 1 on kernel options)

With KMS Xorg is extremely slow, and I don't know why.

Is there a way to make Xorg works faster with KMS?

Is there a way to make Xorg works without KMS like before update?

Thanks in advance.