Re: [gentoo-user] New HD monitor stretches everything. How to teach Xorg?

[Paul Hartman <paul.hartman+gentoo@gmail.com>]

On Tue, Aug 24, 2010 at 5:37 PM, Dale <rdalek1967@gmail.com> wrote:
> Paul Hartman wrote:
>>
>> On Tue, Aug 24, 2010 at 5:07 PM, Kevin O'Gorman<kogorman@gmail.com>
>>  wrote:
>>
>>>
>>> Yah, I might have some luck with that.  Since I'm years out of practice
>>> fooling with this stuff (last seen in 2002) can someone point me at the
>>> tools for
>>> 1) Computing a modeline (I understand the quality varies a lot)
>>> 2) Configuring an xorg.conf
>>>
>>
>> Check out x11-apps/amlc -- it has an interactive modeline generator
>> where you tell it the aspect ratio&  size of your screen and it spits
>> out modelines for you.  You'll still need to fill in the
>> HSync/VSync/Clock speed stuff.
>>
>>
>>
>
> Does this help any?
>
> Section "Screen"
>    Identifier     "Screen0"
>    Device         "Card0"
>    Monitor        "Monitor0"
>    Option         "DPMS" "TRUE"
>    SubSection     "Display"
>        Viewport    0 0
>        Depth       24
>        Modes      "1280x1024" "1024x768" "800x600"
>    EndSubSection
>    SubSection     "Display"
>        Viewport    0 0
>        Modes      "1280x1024" "1024x768" "800x600"
>    EndSubSection
>    SubSection     "Display"
>        Viewport    0 0
>        Depth       4
>        Modes      "1280x1024" "1024x768" "800x600"
>    EndSubSection
>    SubSection     "Display"
>        Viewport    0 0
>        Depth       8
>        Modes      "1280x1024" "1024x768" "800x600"
>    EndSubSection
>
> That's just a part of my xorg.conf.  I don't use hal and don't like udev
> doing mine so I still got my full xorg.conf file.  If you need more, just
> let me know.  Heck, I'll post the whole thing if it will help you any.
>
> Also, have you tried running "X -configure" yet?  I used it on another
> machine and it worked pretty well.
>
> Dale

After creating a basic xorg.conf the modeline should go in the
"Monitor" section. I don't use a modeline now but the only example I
have from my xorg.conf archives are these:

Section "Monitor"
  # 2048x1152 @ 50.00 Hz (GTF) hsync: 59.30 kHz; pclk: 162.24 MHz
  Modeline "2048x1152_50.00"  162.24  2048 2176 2392 2736  1152 1153
1156 1186  -HSync +Vsync
  # 2048x1152 @ 60.00 Hz (GTF) hsync: 71.52 kHz; pclk: 197.97 MHz
  Modeline "2048x1152_60.00"  197.97  2048 2184 2408 2768  1152 1153
1156 1192  -HSync +Vsync
EndSection

And then in the Screen section like Dale posted you'd use for example
"2048x1152_60.00" as your modeline (or whatever you decided to entitle
your modes).

At least that's how it used to work. With modern video cards & modern
Xorg/Gnome/KDE it does a pretty good job of autodetecting that kind of
thing so I haven't had to worry about it in a long time. :)