[chips] ct65540 : no sync on an 640x480 TFT

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Hi all !

I'm trying to make X 4.3.0 running on my Toshiba T2100CT (486-DX2 50MHz) video : c&t 65540 1Mb

Everything works fine with svga or framebuffer (easily, no modelines at all), but I can't make it work with de accelerated C&T driver.

I tried a thousand of different modelines settings (found on many web sites) but I no one succeeded in syncing with de LDC.

I also tried the different options UseModeline and FixPanelSize

I always have a wavy screen (like when we see computers screens on TV broadcast) and X freezes : I have to switch off the computer.

The screen is black, with some color dots (say 10), and when I switch CRT/LCD 4 times to come back to the LCD screen, it becames blue (wich is the desktop color), but the bad timings are the same )-:

I really don't know what to do, after a few weeks of searching how to make it work (fb is reeeeeeally slow on this machine) )))-:

If you have any idea, any suggestion...

Thank you for helping me investigating !

gUI
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