[Intel-gfx] Difference in dot clock between xserver 1.5.2 and 1.9.4 (intel driver)

[SD]

Dear All

I have ONE laptop with ONE hdd and 2 OS - opensuse and fedora on it.
When I boot opensuse LCD picture is perfect but is not on fedora.
I spent many times to find a differences and want to show to you all this one:

X.Org X Server 1.5.2
Release Date: 10 October 2008
X Protocol Version 11, Revision 0
Build Operating System: openSUSE SUSE LINUX
Current Operating System: Linux linux-xmc2 2.6.27.45-0.1-pae #1 SMP 2010-02-22 16:49:47 +0100 i686
...
(II) intel(0): using SSC reference clock of 96 MHz
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X.Org X Server 1.9.4
Release Date: 2011-02-04
[    22.536] X Protocol Version 11, Revision 0
[    22.536] Build Operating System: x86-06 2.6.32-71.14.1.el6.x86_64 
[    22.536] Current Operating System: Linux f14.fedora14 2.6.35.11-83.fc14.i686.PAE #1 SMP Mon Feb 7 06:57:55 UTC 2011 i686
...
[   135.556] (II) intel(0): Supported detailed timing:
[   135.556] (II) intel(0): clock: 65.0 MHz   Image Size:  304 x 228 mm

**************************************************************


On OpenSuse, where I can use clock is 96 MHZ, on Fedora it is 65 MHz.
Why?

And in MHz can be only dot clock, but if I use 1024x768x60Hz = ~ 47.2 MHz and we need to multiply on 3 (subpixels), it will be ~140 MHz
I know that 96 in xserver 1.5.2 is not 140 but it is much closer to it, then 65.

Can some one explain why in xserver 1.5.2 intel driver shows 96 MHz but in 1.9.4 it does only 65 MHz. And can it be the reason why my LCD shows picture like it use less then 50Hz vsync - it is quite unusable.

Thank you.