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I'm running current release of Lucid Lynx desktop version and trying to use 1080p with this TV.
This report includes description of the released official (non-RC) 10.04 LTS desktop version.
BIOS is now the latest 0028 version.

Two tests:
1. Connect HDMI from motherboard to Onkyo amplifier and from Onkyo amplifier to TV:
" Onkyo 7" " text shown in display settings.
2. Connect HDMI from motherboard directly to TV:
" Samsung 7 " text shown in display settings.

The first setup is the one I'm planning to use. What happens is that in
both tests 1 and 2 couple of centimeters (1 inch) is missing at least
from top and bottom of the screen (probably also from left and right). I
can't see any menus but they are there if I scroll the mouse "outside"
the visible area and click there. A workaround to this problem is to use
"Screen Fit" option in the TV, not "16:9". The "Screen Fit" option has
to be used with both 1920 x 1080 (16:9) and 1280 x 720 (16:9)
resolutions. The resolutions seem to be correct however: if I take a
screenshot then it is exactly 1280 x 720.

In summary, there are three problems with this TV:
1) "Screen Fit" option has to be selected.
2) "Searching for Signals" problem in 1920 x 1080: it starts when scrolling in Firefox or moving windows.
3) Flickering problem in 1920 x 1080: the picture "tears", this may include problem 2.
4) No HDMI audio. There is only a faint "click" sound when trying to play audio.

Scrolling in Firefox usually causes symptom 2 but the "Searching for Signals" text may disappear and the picture comes back if scrolling back.
Flickering in problem 3 may disappear if moving the window back, but it starts again especially if window is on the border of the screen.

Problems 2 and 3 do not occur with resolution 1280 x 720 so it is full
HD specific.

I also tried to install the latest PPA kernel (2.6.34-999). With this
kernel problem 4 vanishes and the HDMI audio is played correctly. Also
problem 3 is much less severe with the kernel update. Anyway even with
the kernel update problems 1 and 2 remain.

** Affects: xorg (Ubuntu)
     Importance: Undecided
         Status: Incomplete

-- 
Samsung LE-46B530 TV does not work with Intel DH55HC motherboard
https://bugs.launchpad.net/bugs/572139
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