Dan, setuid was not set. I have set that and X is working now. bash-3.2$ ls -l /usr/bin/Xorg -rwsrwxrwx 1 root root 1563180 Feb 19 15:31 /usr/bin/Xorg bash-3.2$ Thanks for the solution :-) -- --------------------- With regards, Unnikrishnan.A "A candle loses nothing by lighting another candle" <div class="gmail_quote">On Fri, Feb 27, 2009 at 4:43 AM, Dan Nicholson <<a href="mailto:dbn.lists@gmail.com">dbn.lists@gmail.com</a>> wrote: <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div class="Ih2E3d">On Thu, Feb 26, 2009 at 2:51 PM, unni krishnan <<a href="mailto:unnikrishnan.a@gmail.com">unnikrishnan.a@gmail.com</a>> wrote: > Hi > > I am getting following error when starting X as normal user : > > Build Operating System: Linux 2.6.27.10 i686 > Current Operating System: Linux <a href="http://host.webofunni.com" target="_blank">host.webofunni.com</a> 2.6.27.10 #1 SMP PREEMPT > Wed Dec 24 21:37:14 CET 2008 i686 > (WW) xf86ReadBIOS: Failed to open /dev/mem (Operation not permitted) > (WW) xf86OpenConsole: chown /dev/tty7 failed: Operation not permitted > (WW) xf86OpenConsole: chown /dev/tty0 failed: Operation not permitted > xf86EnableIOPorts: failed to set IOPL for I/O (Operation not permitted) > > I am able to start X as root and using xfce as desktop interface. Please > help. </div>Is Xorg setuid to root? sudo chown root $prefix/Xorg sudo chmod u+s $prefix/Xorg -- Dan </blockquote></div>