On 21/07/11 13:07, Marcelo Luiz de Laia wrote:
Hi Alan,
I have found your message at user list and I would like to ask you
about your gdm.conf and about your xorg.conf. Is ti possible to share
it? I have a trouble in setup a multihead here. Please, could you
found my previous message at
http://lists.debian.org/debian-user/2011/07/msg01712.html
I want to do that in one single card.
Thank you very much!
Marcelo
Firstly, when I first started I had a blank canvas to play with. I was
building a new computer from scratch and could choose almost any
hardware I wanted. In the end I bought an extra graphics card (Gigabit
Geforce 8400GS that turned out to be totally superflous to requirements.
On the other hand I did have to go out and buy a DVI to VGA cable.
1) I chose Intel for the simple reason that the i5 2500 had a very good
price/performance value and apart from the debacle over the GMA500 in an
Dell atom laptop have generally got good performance open source
drivers. However their were murmurings on the internet that non Intel
motherboards had proven unstable. All these were were based around the
time Sandybridge first came out, but I didn't find anything that later
said it was alright. So I chose to go with an Intel Motherboard, the
DH67DL with integrated graphics.
2) I spent a while exploring Xinerama before I realised it was not right
3) Although I specify some things in xorg.conf, Gnome through the
System/Preferences/Monitor dialog seems to modify things as I log in. I
suspect it is using xrandr to do this. However what I put in xorg.conf
certainly effects the scope of what this dialog presents. In particular
it was limiting my secondary monitors resolution to 1024x768 until I got
the correct xorg.conf working. Then it added 1280x1024 as a mode.
4) I originally altered /etc/gdm3/Init/Default to include xrandr
commands to achieve what I eventually achieved through xorg.conf. It
didn't work well for me - but also is not the recommended approach, so I
restored that file to its original setting and started working on
/etc/X11/xorg.conf
5) Some of my xorg.conf is Intel Specific you will have to figure out
the Nvidia or Nouveau equivalents
My xorg.conf
Section "Device"
Identifier "H67 Integrated Graphics"
Driver "intel"
Option "Monitor-HDMI2" "Iiyama 24in"
Option "Monitor-VGA1" "Iiyama 17in"
EndSection
Section "Monitor"
Identifier "Iiyama 24in"
Option "DPMS"
Option "Primary"
Option "PreferredMode" "1920x1080"
Option "Position" "0 0"
EndSection
Section "Monitor"
Identifier "Iiyama 17in"
Option "DPMS"
Option "PreferredMode" "1280x1024"
HorizSync 24.0-80.0
VertRefresh 55-75
Modeline "1280x1024" 106.08 1280 1320 1392 1640 1024 1026 1029 1078 #
106 MHz, 64.7 kHz, 60.0 Hz
Option "Position" "1920 0"
EndSection
Section "Screen"
Identifier "Default Screen"
Device "H67 Integrated Graphics"
Monitor "Iiyama 24in"
DefaultDepth 24
Subsection "Display"
Depth 24
Modes "1920x1080" "1024x768" "640x480"
EndSubSection
EndSection
The only strange one is the modeline. As my previous post said, I used
videogen for that.
--
Alan Chandler
http://www.chandlerfamily.org.uk
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