Am Dienstag 11 November 2008 schrieb Andreas Pakulat:
> Hi,
Hi Andreas,
> hab hier ein Setup mit 2 Monitoren und haette es ganz gerne, dass ich
> ohne einen nachtraeglichen xrandr Aufruf die korrekten Aufloesungen
> bekomme.
>
> Im Moment werden beide mit 1440x1050 gestartet, was das hoechste ist
> das der kleinere Monitor hinbekommt. Der grosse jedoch soll mit
> 1920x1200 betrieben werden.
>
> Die xorg.conf schaut im Moment so aus:
Einfach bei Google How to randr suchen ;-) und unten stehenden Wikitext
finden. Das Ausschalten des VGA-Ausgangs via Ignore-Option hat auf meinem
ThinkPad T42 mit Radeon-Treiber nicht funktioniert - vielleicht klappt es
mittlerweile. Ich habe einen xrandr-Befehl dazu im KDE-Autostart.
Neben gtf gibts auch noch cvt für Flachbildschirme.
Ich denke, PreferredMode brauchst Du nur, wenn Du mit einem der
automatisch erkannten und gewählten Modi nicht zufrieden bist.
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III. xorg.conf based configuration
Running xrandr is convenient for dynamic configuration, but it may be
boring if you have to run it after every startup of your X server.
Section III.6 summarizes all this by showing an example of modern
configuration.
III.1. Per Output Config
Before configuring an output, you need to know how to specify it in the
config file. To do so, you may add a Monitor-FOO option to the Device
section to identify the monitor section for output FOO. For instance:
Section "Device"
Identifier "My Graphic Board"
...
Option "Monitor-LVDS" "Internal Panel"
Option "Monitor-VGA" "External VGA Monitor"
EndSection
Section "Monitor"
Identifier "Internal Panel"
...
EndSection
Section "Monitor"
Identifier "External VGA Monitor"
...
EndSection
Then, all output-specific options should go in the corresponding Monitor
section.
III.2. Placing outputs
Add the following line to place one monitor on the right of another one as
xrandr --output FOO --right-of BAR would do:
Section "Monitor"
Identifier "FOO"
EndSection
Section "Monitor"
Identifier "BAR"
Option "RightOf" "FOO"
EndSection
III.3. Changing DPI and DisplaySize
If your monitor size isn't detected correctly and thus generates a wrong
DPI, you need to add a DisplaySize option to the corresponding monitor
section. For output FOO, use:
Section "Monitor"
Identifier "MyMonitor"
DisplaySize 304 228
EndSection
Section "Device"
...
Option "Monitor-FOO" "MyMonitor"
EndSection
III.4. Forcing outputs off or on
If for some reason one output of your graphic board is enabled while it
should not, you might want to disable it (for instance because the number
of CRTCs available is limited). To do so, add:
Option "Ignore" "true"
If for some reason one output is disabled by the driver (for instance
VGA-0 on Radeon Xpress 200 because load detection is not reliable in the
driver yet), you might want to enable it by force. To do so, add:
Option "Enable" "true"
Then, you might need to add modes since such an output may not query modes
correctly. See "Forcing a preferred mode" to do so.
III.5. Forcing a preferred mode
This is one of rare cases where the ModeLine open is still useful these
days. If the preferred mode reported by your monitor isn't the one you
want by default, or if there is no preferred mode and the driver does not
choose the right one, you might want to force another mode on an output.
Assuming you want to force 1280x1024 at 75Hz at startup, add something
like the following to the Monitor section:
Modeline "1280x1024_75.00" 138.54 1280 1368 1504 1728 1024 1025
1028 1069 -HSync +Vsync
Option "PreferredMode" "1280x1024_75.00"
The ModeLine line may be obtained by looking at your current Xorg.0.log if
the mode is already detected (when it appears in the output of xrandr).
Or you may generate a new one using:
$ gtf 1280 1024 75
Modeline "1280x1024_75.00" 138.54 1280 1368 1504 1728 1024 1025 1028
1069 -HSync +Vsync
III.6. Example of modern configuration
Here's an example of xorg.conf for a ATI board with DVI-0 (with
DisplaySize and preferred mode forced), LVDS (placed on the right of
DVI-0) and VGA-0 (disabled) outputs.
Section "InputDevice"
Identifier "Generic Keyboard"
Driver "keyboard"
Option "CoreKeyboard"
Option "XkbRules" "xorg"
Option "XkbModel" "pc101"
Option "XkbLayout" "us"
EndSection
Section "InputDevice"
Identifier "Configured Mouse"
Driver "mouse"
Option "CorePointer"
Option "Device" "/dev/input/mice"
Option "Protocol" "ImPS/2"
Option "Emulate3Buttons" "true"
Option "ZAxisMapping" "4 5"
EndSection
# external DVI with DisplaySize and preferred mode overriden
Section "Monitor"
Identifier "External DVI"
DisplaySize 304 228
Modeline "1280x1024_60.00" 108.88 1280 1360 1496 1712 1024 1025
1028 1060 -HSync +Vsync
Option "PreferredMode" "1280x1024_60.00"
EndSection
# internal laptop panel to place on the right of DVI-0
Section "Monitor"
Identifier "Integrated LCD"
Option "RightOf" "External DVI"
EndSection
# disable VGA by default
Section "Monitor"
Identifier "VGA-0"
Option "Ignore" "true"
EndSection
Section "Device"
Identifier "ATI Technologies, Inc. M22 [Radeon Mobility M300]"
Driver "ati"
BusID "PCI:1:0:0"
Option "AccelMethod" "EXA"
Option "Monitor-DVI-0" "External DVI"
Option "Monitor-LVDS" "Integrated LCD"
# no need to specific Monitor-VGA-0, it uses the "VGA-0" identifier
automatically
EndSection
Section "Screen"
Identifier "Default Screen"
Device "ATI Technologies, Inc. M22 [Radeon Mobility M300]"
DefaultDepth 24
SubSection "Display"
Depth 24
# big virtual screen to place
Virtual 3072 1200
EndSubSection
EndSection
Section "ServerLayout"
Identifier "Default Layout"
Screen "Default Screen"
InputDevice "Generic Keyboard"
InputDevice "Configured Mouse"
EndSection
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http://wiki.debian.org/XStrikeForce/HowToRandR12
Ciao,
--
Martin 'Helios' Steigerwald - http://www.Lichtvoll.de
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