[ltp] xorg.conf for t42p + Dell 2407wfp monitor

[Alex Deucher]

On 12/26/06, Marius Gedminas <mgedmin@b4net.lt> wrote:
> On Mon, Dec 25, 2006 at 03:37:02PM -0800, Yury wrote:
> > On Monday 25 December 2006 05:48, Marius Gedminas wrote:
> > > The log file should also mention why it considers 1920x1200 unsupported,
> > > a few tens of lines above this bit.
> >
> > I have posted my xorg.conf and the log to
> >
> > http://www.blin.com/web/xorg.conf
> > http://www.blin.com/web/Xorg.1.0.log
> >
> > I think the monitor reports 1920x1200 as "Supported additional Video Mode"
> > however it doesn't get listed under CRTC2 modes found for MergeFB.
>
> Yes.  It looks like the X server doesn't know anything about a 1920x1200
> mode (it discards a couple of 1920x1440 modes for various reasons, but
> doesn't even mention 1920x1200, other than saying it's not supported).
>
> If I'm right, then all you need to do is specify a ModeLine.  This:
>
> (II) RADEON(0): Supported additional Video Mode:
> (II) RADEON(0): clock: 154.0 MHz   Image Size:  519 x 324 mm
> (II) RADEON(0): h_active: 1920  h_sync: 1968  h_sync_end 2000 h_blank_end 2080 h_border: 0
> (II) RADEON(0): v_active: 1200  v_sync: 1203  v_sync_end 1209 v_blanking: 1235 v_border: 0
>
> translates into
>
>   ModeLine "1920x1200"  154  1920 1968 2000 2080  1200 1203 1209 1235
>
> and the X server could easily do it automatically.  I've no idea why it
> doesn't.  *sigh*  Perhaps the new randr will fix that?
>
> The only problem is that I've no idea where to put the Modeline.
> According to man xorg.conf, Modelines are supposed to be placed in the
> Monitor section.  But when you use MergedFB, you don't actually have a
> Monitor section for the external display.  Will it work if you place the
> mode in the Monitor section for the internal display?  I guess the only
> way to find out is to try it.
>

Put it in the monitor section.  Any modes specified there will end up
in a global mode pool that is used for both heads when using mergedfb.

Alex


> Good luck,
> Marius Gedminas
> --
> There are a lotta computer languages out there doing drugs.
>                 -- Larry Wall
>
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