How to configure a desired screen resolution

[=?UTF-8?Q?Jos=C3=A9_P=C3=A9rez_Arauz?=o]

Hi,
I had exactly the same issue and solved modifying xorg.conf with this:
1) add
        Option       "PreferredMode" "1600x900"
to your "Monitor" section
2) make sure you have
        SubSection "Display"
                Viewport   0 0
                Depth     24
                Modes     "1600x900"
        EndSubSection
in your "Screen" section.



Cheers,




On Wed, 15 Oct 2014 16:11:40 -0700, Jin Guojun wrote
> The latest xorg 1.7.7 seems too smart to configure. It always uses 
> what it thinks and ignores what xorg.conf file tells to do.
> 
> I am using Vesa driver on 8.4-R / 10.1-RC amd kernel on the same 
> hardware (ASUS A88XM-A motherboard) and experienced this difficulty.
> 
> Two monitors: one has 1600x900 resolution and the other has 
> 1920x1080 res. When attaching 1600x900 monitor to the system, xorg-
> 1.7.7 X server configures the screen as 1600x900, which is nice and 
> it is what I wanted. When connecting 1920x1080 monitor to the system,
>  X server configures screen as 1920x1080, which is correct, but is 
> will not give 1600x900 resolution regardless if the Modes "1600x900" 
> is in Screen section in xorg.conf file.
> 
> If attaching both monitors to the system, then both monitors will be 
> configured as 1600x900, thus both monitors are capable to work in 
> 1600x900 resolution.
> 
> Now, how to tell (force) X server to use 1600x900 resolution for the 
> 1920x1080 monitor?
> 
> -Jin 
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--
José Pérez Arauzo