I installed Centos 6.2/i386 on a machine last night with a 1920x1080 monitor. The installer ran in graphical mode and looked fine. After the install was finished I rebooted and ran through the "firstboot" stuff (set up user, etc) with no problem and, again, it looked good.
After that, when I should have seen the gdm login screen, all I got was the blue background but not the box with the usernames in it, so there is no way to log in.
"telinit 3", login to the text console, no problem. Type "startx", back to the same empty blue screen that gdm shows me.
[root@ws194 log]# cat /etc/hosts 127.0.0.1 localhost localhost.localdomain ws194 ws194.ltsp ::1 localhost localhost.localdomain ws194 ws194.ltsp [root@ws194 log]# uname -a Linux ws194.ltsp 2.6.32-220.2.1.el6.i686 #1 SMP Thu Dec 22 18:50:52 GMT 2011 i686 i686 i386 GNU/Linux [root@ws194 log]#
I rsynced /etc/skel to /home/myusername before running startx but that made no difference. Still got the blank blue screen.
I tried disabling the Composite extension as directed here: http://www.linuxquestions.org/questions/slackware-14/unable-to-startx-after-...
Nothing changed.
I don't see anything in /var/log/Xorg.0.log that looks too interesting; it appears that X figures it's running fine.
This was working fine with a smaller monitor on Centos 5.7. Plus the Centos 6 installer looked fine, and the blue screen also looks nice and crisp,