When launching startx, I first have an error message:
_X11TransSocketUNIXconnect : can't connect - errno 111
and then, the Xserver (XF86_SVGA) is correctly started.
If I replace xinit (from rpm XFree86-184.108.40.206-52), by xinit
from the official distribution of XFree86-220.127.116.11, then, the
"bug" is fixed.
My video card is a Matrox Millenium MGA (2MB or ram).
This issue has been forwarded to a developer for further action.
this will be fixed in a forthcoming errata release of X.