Public bug reported:

After upgrading from Ubuntu 8.04 to Ubuntu 9.04 RC, enabling the
Xinerama server option with the fglrx driver crashes X.  This is simliar
to bug #355841, but since that was for i386 I wanted to file another bug
for amd64.  From what I can tell, on bootup the fglrx driver will finish
initializing and then crash the X server while trying to configure the
CRTCs.  When X tries to start again, the fglrx driver causes a kernel
lockup during the DDC probe.  The fglrx built-in Xinerama extension
appears to work fine, but since maximized windows using this extension
span multiple displays this is not a valid workaround.

ProblemType: Bug
Architecture: amd64
DistroRelease: Ubuntu 9.04
LsHal:
 
NonfreeKernelModules: fglrx
Package: xorg-driver-fglrx 2:8.600-0ubuntu2
ProcEnviron:
 PATH=(custom, no user)
 SHELL=/bin/bash
ProcVersion: Linux version 2.6.28-11-generic (bui...@crested) (gcc version 
4.3.3 (Ubuntu 4.3.3-5ubuntu4) ) #42-Ubuntu SMP Fri Apr 17 01:58:03 UTC 2009
SourcePackage: fglrx-installer
Uname: Linux 2.6.28-11-generic x86_64

** Affects: fglrx-installer (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: 9.04 amd64 apport-bug fglrx jaunty xinerama

-- 
Jaunty + fglrx + Xinerama crashes X (Ubuntu 9.04 AMD64)
https://bugs.launchpad.net/bugs/364497
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