well the system boots into runlevel 3
so i am not going in GUI runlevel(5) at all..if i #init 5 everything works well..
the flickering is in runlevel 3.
Sigh. It would have been helpful if you had provided this information when you asked for help.
Sounds like you are using a framebuffer.
What is the value of the TERM environmental variable?
What video card are you using?
What version of Redhat?
Are you running on a hypervisor or virtualized?