See the report on the upstream bugzilla system :

https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=236195

As stated, this will be (probably) solved in el5.1 ...

After having read the bug report: would it be safe enough to try the kernels here?

http://people.redhat.com/dzickus/el5/19.el5/i686/

or:

http://people.redhat.com/dzickus/el5/28.el5/i686/

They all have CONFIG_FB_VESA=y

R-C

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