I downloaded the previous xorg rpm's, version 6.8.1-12.FC3.21, from the Fedora web page. I forced rpm to load the previous packages, then I erased the newer xorg packages (6.8.2-1.FC3.13.) I should probably have done that in the opposite order. But, I'm now running with 2 processors enabled, no hyperthreading, in a gnome-terminal under X11.
So something about the newer xorg packages disagreed with my dual processor system.
BTW, I tried enabling hyperthreading again with the second processor disabled. Inexplicably, this time, the system locked up once I brought up X. I could have sworn that that worked correctly with the 6.8.2-1.FC3.13 packages.
Thank you for downgrading and verifying the issue. I would advise reporting at bugzilla.redhat.com and search upstream for any existing similar report. If nothing similar exists then also report upstream. Note in both reports the equivalent RH/upstream report URL.
Warren Togami wtogami@xxxxxxxxxx