I installed linux RedHat version 7.0 on a dell poweredge 8450 with 4 cpu and 4 Gb of memory. When I boot the system in "init 5", it takes about 5 minutes to login, and it is very slow to respond. I ran top it after a couple of minutes the application started and showed all the cpu's are about 50 or mor utilized mostly by the system. The top itself was using about 45% of the cpus. When I run the system in "init 3", every thing runs normally.
If you boot to run level 3 then start X11 does it stay fast ?
Yes, even after I start with init 3 and run startx, the system slows down drastilcaly.
Are you using kdm, gdm or xdm?
Can you try out the latest rawhide XFree86 packages? XFree86-4.0.3-5 and Mesa-3.4-13. Do they change the situation for you at all?
Please reopen bug if problem persists after upgrading to red Hat Linux 7.2 and applying all updates that have been released.