Thanks Darrin, I have modified xorg.conf for 1400x900_75 and works great.

Now for the list (maybe someone will have the same or related problem):

# gtf 1440 900 75
Modeline "1440x900_75.00"  136.49  1440 1536 1688 1936  900 901 904
940  -HSync +Vsync

Added the above line to "Monitor" section.

On the screen section :

SubSection "Display"
                Viewport   0 0
                Depth     24
                Modes       "1440x900_75.00"
        EndSubSection

Thanks again,
Marius

On 9/18/07, Darrin Chandler <dwchandler@stilyagin.com> wrote:
quoted text
> On Tue, Sep 18, 2007 at 09:44:14PM +0300, Marius ROMAN wrote:
> > (II) ATI(0): Not using mode "1440x900" (no mode of this name)
> >
> > Using gtf (gtf 1440 900 60) I have added :
> > Modeline "1440x900_60.00"  106.47  1440 1520 1672 1904  900 901 904
> > 932  -HSync +Vsync
> > to the "Monitor" section on xorg.conf.
>
> Try matching the name in the Modeline and the one you use in Modes. IOW,
> use "1440x900_60.00" in both places. Or use "1400x900" in both places.
>
> --
> Darrin Chandler            |  Phoenix BSD User Group  |  MetaBUG
> dwchandler@stilyagin.com   |  http://phxbug.org/      |  http://metabug.org/
> http://www.stilyagin.com/  |  Daemons in the Desert   |  Global BUG Federation