LVDS for MATRIX

Evgen

Hello!
I am trying to connect a Toshiba matrix ltm08ts 43p 800x600.
I have a ready-made working display, based on this matrix and the hdmi to lvds converter, I want to remove the converter and connect the matrix to gk 3288 directly. I installed the ubuntu with lvds on the firefly and connected the matrix to the lvds connector, set the xrandr mode to 800 on 600, there is an image, but the color rendition is wrong. Please help, in more detail, how to set up the work of lvds with such a matrix? Where and how to change settings in ubuntu? Or do you need to rebuild the whole image of ubuntu? If you need to rebuild the image, then how to find these parameters in the source? Please give instructions as simple as possible, I'm new to this business. Thank you

Sincerely, Evgeny Eliseev