On Sat, Mar 9, 2013 at 5:05 PM, Yves Bellefeuille <yan at storm.ca> wrote: > The release notes for CentOS 6.4 state as follows: > >> With this release the ABI for the X.org video drivers changes, >> possibly resulting in a failing X-Session. If you are running 3rd >> party drivers - i.e. vBox addons, nVidia, ATI or ELRepo - you need to >> ensure a compatible driver is loaded. > > I use flgrx from ELRepo. Does this mean that fglrx is now incompatible > with CentOS? Depend on how "new" your card is. :) The CentOS 6.4 release notes also has this description in the 'Known Issues' section: "The proprietary drivers for older AMD ( former ATI ) video cards, namely the 3xxx, 4xxx and 5xxx series ( both integrated in motherboards or standalone cards) are not compatible with the new version of the X server introduced in CentOS 6.4. " More details are in this ELRepo bug report: http://elrepo.org/bugs/view.php?id=355 Akemi