I'v found my problem, may be it's a solution for you too Richie. I use my monitor with the dvi port of my graphic card. Or vesa informations are carrying by the standard vga port, nor the dvi port in my case.
Changin the ports result in successfully detection of my screen parameters. -- Installer fails to detect monitor correctly https://launchpad.net/bugs/76054 -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
