The updated xorg drivers that were released as a part of upstream's 6.3 
release have been posted to

ftp://ftp.scientificlinux.org/linux/scientific/6rolling/testing/i386/
ftp://ftp.scientificlinux.org/linux/scientific/6rolling/testing/x86_64/

These packages may address some of the xorg issues encountered with the 
last security update.


yum --enablerepo=sl-testing update <package you wish to test>


As a reminder, this update was posted for testing on June 29th.  There 
were no reports of X related problems during this 12 day window.

All problem reports provided during that window were corrected.

http://listserv.fnal.gov/scripts/wa.exe?A2=ind1206&L=scientific-linux-users&X=766B912E1DB10315B7&P=24553


i386:
     xorg-x11-drv-ati-6.14.2-9.el6.i686.rpm
     xorg-x11-drv-ati-firmware-6.14.2-9.el6.noarch.rpm
     xorg-x11-drv-intel-2.16.0-4.el6.i686.rpm
     xorg-x11-drv-intel-devel-2.16.0-4.el6.i686.rpm
     xorg-x11-drv-mga-1.4.13-7.el6.i686.rpm
     xorg-x11-drv-wacom-0.13.0-6.el6.i686.rpm
     xorg-x11-drv-wacom-devel-0.13.0-6.el6.i686.rpm

x86_64:
     xorg-x11-drv-ati-6.14.2-9.el6.x86_64.rpm
     xorg-x11-drv-ati-firmware-6.14.2-9.el6.noarch.rpm
     xorg-x11-drv-intel-2.16.0-4.el6.i686.rpm
     xorg-x11-drv-intel-2.16.0-4.el6.x86_64.rpm
     xorg-x11-drv-intel-devel-2.16.0-4.el6.i686.rpm
     xorg-x11-drv-intel-devel-2.16.0-4.el6.x86_64.rpm
     xorg-x11-drv-mga-1.4.13-7.el6.x86_64.rpm
     xorg-x11-drv-wacom-0.13.0-6.el6.x86_64.rpm
     xorg-x11-drv-wacom-devel-0.13.0-6.el6.i686.rpm
     xorg-x11-drv-wacom-devel-0.13.0-6.el6.x86_64.rpm