Description of problem:
On RHEL5-B2(kernel-2.6.18-1.2767.el5),X fails to come up with the ati driver.
X fails to come up even during the installation and after the installation.

After installation when we try to start X we get the following error message :

(EE) No devices detected.

Fatal server error:
no screens found
XIO:  fatal IO error 104 (Connection reset by peer) on X server ":0.0"
      after 0 requests (0 known processed) with 0 events remaining.


Version-Release number of selected component (if applicable):
RHEL5-B2(kernel-2.6.18-1.2767.el5)
xorg-x11-drv-ati-6.6.3-2.el5

How reproducible:


Steps to Reproduce:
1.Install RHEL5-B2(kernel-2.6.18-1.2767.el5) on PE700 or PE2650.
2.Try to start X
3.
  
Actual results:
X fails to come up.

Expected results:
X should start without any errors.

Additional info:
Attached the Xorg.log,xorg.conf and output of lspci