Problem of fading of Linux logo in portrait mode

Hallo,

I have a SA1110 based board with linux-2.5.6-rmk1 running on it. On this board I am trying to make an ALPS monochrome LCD work, whose resolution is 240X320 and has 4Bpp.

The problem:
If I configure the LCD for 320X240 mode, I get two screens, the first one being of length 240 pixels and the next one being 120 pixels and two logos along with 2 cursors blinking, with a good contrast.
Since the LCD is portrait type i.e 240X320, so when I make the changes to drivers/video/sa1100fb.c for this resolution, the penguin logo comes alongwith the cursor but within 5-10 seconds the logo fades away and the cursor becomes invisible.


I have struggled a lot to find the reason behind it and am stuck up on this for a number of weeks on this. I get the timing calculations for 320X240 only @ 70Hz but not for 240X320 @ 70Hz. 

Can somebody please give me pointers as to what I should look into.

Thanks and Regards....Aradhana


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