Well, if you want me to try to help you with what's wrong in the 1680x1050 case, I need a corresponding log
a 1680x1050 monitor should not have the black lines problem (it seems to be specific with some 1080p monitors), and it should also work with PatchVBios=Yes and correct resolution in refit.conf.
I tested with the 1920x1080 display unplugged.
Please find attached a zipped file, which contains two folders, each of which contains preboot.log and a boot bmp under 1680x1050 & 1280x1024 in refit.conf.
My config.plist is also included to show you the Graphic flags under which I tested.
Thank you very much in advance.
Pene, I think I got why.
Regarding 1680 display, I changed its DVI connector to No. 1 of the GTX460 card.
Then, it displayed a full 1680x1050 screen like a charm.
When the display was connected to No. 2 DVI port again, it downgraded to 800x600 display.
Therefore, it's not a Clover issue, but the different output capacity of vga card ports, I guess.
With 1920x1080, a screenshot of the Clover boot has a dimension of 1920x1080 when I saw it in OS X.
I guess that means the screen is contracted in the booting stage.
One thing I'd like to mention is that this 1920x1080 display is connected via a DVI-HDMI adapter (via-DVI, lcd-HDMI).
Do you think this adapter can make any difference?[EDITED AGAIN !!!] - SOLVED
Pene, you really made me rock'n roll
Actually, months ago, I was trying to flash nvidia rom using NVFLASH, but fruitless.
That's because I didn't know what I should touch. So, then I gave up and forgot it.
What I learned from those countless trials? How to flash video rom.
I became very daring in doing it.
In the beginning, when I decided to flash the card, you know, I was trembling actually.
today, your comment on "Non-Native Display Panel" option in NiBiTor changed the whole thing!
After my video ROM was modified in NiBiTor and flashed in NVFlash,
the whole black edges are gone!!! in 1920x1080 resolution.
I'd fought this resolution headache for almost two years until now!
At first, with 1680x1050, and then with 1920x1080 as I got this 27" display.
Now, with GTX460 and Clover, I can enjoy a full booting screen in any display, 1680x1050 or 1920x1080.
Thank you, Thank Slice, Thank Mrengles, Thank the whole Team!!!
God Bless Clover!!!
P.S. As a bonus, I got a small and cute boot screen of the mobo's native instead of the extended one.
And I changed the attachment to new successful ones - preboot.log in 1920x1080 + screenshot.
P.S-2: Please look at the cursor position. There's no spare space.