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

[Garf1eld]

Hi Yury
I just got myself the same LCD and suffer from that stretched 1600x1200 res.
Can you provide me your xorg.conf?  I've tried to do as others have
mentioned but no luck.

Thanks.

Garfield


Yury-3 wrote:
> 
> On Tuesday 26 December 2006 09:03, Alex Deucher wrote:
>> 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
> 
> I did put the Modeline into the Monitor section. 
> After that the problem has changed to:
> (II) RADEON(0): Not using mode "1920x1200" (width too large for virtual
> size)
> 
> After googling that one for a while, found a tip to decrease the upper
> limit 
> for the horizontal frequency (from 80kHz to 74kHz as needed for 1920
> mode).
> After changing "CRT2HSync" option to "31-74" the setup is now functional!
> 
> Thanks to everybody who provided suggestions!
> 
> The next step would be to get the same setup with the DVI connection ;-)
> 
> Yury
> 
> 
> -- 
> The linux-thinkpad mailing list home page is at:
> http://mailman.linux-thinkpad.org/mailman/listinfo/linux-thinkpad
> 
> 

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