[ltp] External monitor

[linux-thinkpad@linux-thinkpad.org]

Hi, 

thank you all for your assistance. Unfortunatley my problem is still not solved. I tried the various modifcations in the xorg.conf file, I tried the xorg.conf file from marius with the exact same symptoms. There is a signal however the monitor - as the beamer - stays black. I use a recent kernel (latest from debian unstable 2.6.18.x) which has this framebuffer stuff activated, linux console during boot has resulution of 800x600 or even bigger. Could this be related to my problem ? Anyone running such a system without my problem ?

I will try a boot CD in the next days.

Cheers,


Marcel



-------- Original-Nachricht --------
Datum: Wed, 29 Nov 2006 16:51:17 +0200
Von: Marius Gedminas <mgedmin@b4net.lt>
An: linux-thinkpad@linux-thinkpad.org
Betreff: Re: [ltp] External monitor

> On Wed, Nov 29, 2006 at 11:07:48AM +0100, credito@gmx.de wrote:
> > I have a T42 with Debian unstable installed. A while ago I
> > successfully configured my thinkpad to use an external monitor/beamer.
> > I haven't used it for a while and after some debian unstable upgrades
> > (My guess is the step from xorg 7.0 to 7.1) this feature is broken. 
> > 
> > If I boot the thinkpad with external display attached it works fine.
> > But I cannot get the display working once X is running and I attach
> > the external display. Fn-F7 doesn't do the trick. However I noticed
> > that the monitor receives some kind of signal but does not display
> > anything. 
> > 
> > Xorg.conf snippet:  
> > 
> > Section "Device"
> > 	Identifier	"ATI Technologies, Inc. Radeon Mobility M7 LW [Radeon
> Mobility 7500]"
> > 	Driver		"ati"
> > 	BusID		"PCI:1:0:0"
> > 	VideoRam	32000
> > 	Option		"UseFBDev"		"false"
> > 	Option      "SWcursor" "true"
> >         Option      "DRIReinit" "true"
> >         Option      "AGPMode" "4"
> >         Option      "BIOSHotkeys" "true" 
> 
> Add
> 
> >         Option      "MergedFB" "true" 
> 
> It that still doesn't help, add
> 
>         Option          "CRT2HSync"     "30-80"
>         Option          "CRT2VRefresh"  "59-75"
> 
> To get the real hsync/vrefresh ranges, restart X so that it can detect
> the external monitor, then look them up from the EDID info in the
> Xorg.0.log.
> 
> If you're interested, my xorg.conf is here: http://mg.pov.lt/xorg.conf.
> I have the same laptop with the same Radeon 7500 video card.  I also
> often use a dual-head desktop.  I can switch between 1024x768 clone mode
> and full dual-head 1024x768+1280x1024 at runtime with
> 
>   xrandr -s 0
>   xrandr -s 1024x768
> 
> HTH,
> Marius Gedminas
> -- 
> "Linux: the operating system with a CLUE... Command Line User
> Environment".
> (seen in a posting in comp.software.testing)

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