No 1080p for HDTV in PrefPane

Hi,
I try to setup my HDTV (Samsung LE-40M86BDX) on my MacMini and I can't set the native resolution to 1920x1080 progressive.
The TV is connected trough an DVI to HDMI cable on a specific HDMI/DVI port on the TV. The LE-40M is a FullHD 1080p which supports 480p, 720p, 1080i and 1080p on this port.
In PrefPane on MacMini Intel and my Powerbook G4 10.4.10, the TV is seen as a Samsung TV with some resolution as 1280x720p. But the maximal resolution I can choose is 1920x1080 interleaved... It's not possible to choose 1920x1080p which doesn't appear.
Using DisplayConfigX, I can set a 1080p resolution which works... but the program is awful to use, and after choosing this resolution the cursor vanish on the screen (in fact the cursor becam a lot of small point as signal noise).
If I use other operating system as Windows I have no problem using 1080p through the DVI to HDMI cable...
1080i look bad on FullHD TV...

In fact GMA950 support 2048x1536 at 75 Hz maximum resolution... the bandwith is the maximum a single DVI link could support (~160MHz).
Well, sort of. The subsystem's bandwidth is dependent on the memory bus speed of the system it is attached to, & to a lesser extent by the CPU's performance & the characteristics of the display signal. In the Mac Mini, the maximum supported resolution is 1920 by 1200 pixels, & up to either 135 Mhz or 154 MHz, depending on the 'coherency' (huh?) of the display. (reference: Mac mini (Late 2006) - Technical Specifications)
Plus, from what I can tell from Intel's documentation, 1080p is/isn't supported, apparently depending on the performance of the overall architecture, although this is discussed in a Windows context so I have no idea how it applies to OS X.

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No 1080p for HDTV in PrefPane

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