Xinerama vs KDE Config Monitor resolution

Acer Aspire 1410 with LCD 1366 x 768
openSUSE 11.2
KDE 4.3.5 “release 0”

Using Applications->System->Configuration->Configure X11 System (which brings up SaX2), I configured a 2nd monitor to have a resolution of LCD 1280 x 768 (WXGA) @ 60 Hz. The second monitor was also configured to be an extended desktop, not a clone.

Applications->Configure Desktop->Display does not allow the selection of this resolution, only offering 1024 x 768, 1280 x 1024, and 1280 x 960 as resolutions that are closest to the one I want.

How do I get Display to allow my preferred setting of 1280 x 768?

Thanks!

Relevant sections of /etc/X11/xorg.conf:

Section “Monitor”
DisplaySize 340 270
HorizSync 29-66
Identifier “Monitor[0]”
ModelName “AUO LCD MONITOR”
Option “DPMS”
Option “PreferredMode” “1366x768”
VendorName “AUO”
VertRefresh 43-60
UseModes “Modes[0]”
EndSection

Section “Modes”
Identifier “Modes[0]”
EndSection

Section “Screen”
DefaultDepth 24
SubSection “Display”
Depth 15
Modes “1366x768” “1360x768” “1280x768” “1280x720” “1024x768” “1280x600” “1024x600” “800x600” “768x576” “640x480”
Virtual 3840 1200
EndSubSection
SubSection “Display”
Depth 16
Modes “1366x768” “1360x768” “1280x768” “1280x720” “1024x768” “1280x600” “1024x600” “800x600” “768x576” “640x480”
Virtual 3840 1200
EndSubSection
SubSection “Display”
Depth 24
Modes “1366x768” “1360x768” “1280x768” “1280x720” “1024x768” “1280x600” “1024x600” “800x600” “768x576” “640x480”
Virtual 3840 1200
EndSubSection
SubSection “Display”
Depth 8
Modes “1366x768” “1360x768” “1280x768” “1280x720” “1024x768” “1280x600” “1024x600” “800x600” “768x576” “640x480”
Virtual 3840 1200
EndSubSection
Device “Device[0]”
Identifier “Screen[0]”
Monitor “Monitor[0]”
EndSection

Section “Device”
BoardName “Mobile Intel GM45 Express Chipset”
Driver “intel”
Identifier “Device[0]”
Option “EXANoComposite”
Option “SaXDualHead”
Option “monitor-VGA” “Monitor[0]”
Option “SaXDualMonitorVendor” “–> LCD”
Option “SaXDualOrientation” “RightOf”
Option “SaXDualResolution” “1280x768”
Option “SaXDualMode” “Xinerama”
Option “SaXDualHSync” “30-50”
Option “SaXDualMonitorModel” “1280X768@60HZ”
Option “SaXDualVSync” “50-61”
Option “SaXExternal” “Identifier&EXT+DisplaySize&+VendorName&–> LCD+RightOf&Monitor[0]+PreferredMode&1280x768+HorizSync&30-50+ModelName&1280X768@60HZ+VertRefresh&50-61”
Option “monitor-LVDS” “EXT”
Screen 0
VendorName “Intel”
EndSection

Section “Monitor”
HorizSync 30-50
Identifier “EXT”
ModelName “1280X768@60HZ”
Option “RightOf” “Monitor[0]”
Option “PreferredMode” “1280x768”
VendorName “–> LCD”
VertRefresh 50-61
EndSection

Section “DRI”
Group “video”
Mode 0660
EndSection

Section “Extensions”
Option “Composite” “on”
EndSection

Configuring graphics cards/Dual Head Mode - openSUSE

This link may help you out;)

Thanks for the tip TuxAttack80!

From the page, I started researching “xrandr”. Here’s what ended up working, though I wasn’t able to make the new mode permanent:

> gtf 1280 768 60

1280x768 @ 60.00 Hz (GTF) hsync: 47.70 kHz; pclk: 80.14 MHz

Modeline “1280x768_60.00” 80.14 1280 1344 1480 1680 768 769 772 795 -HSync +Vsync

> xrandr --newmode “1280x768_60.00” 80.14 1280 1344 1480 1680 768 769 772 795 -HSync +Vsync
> xrandr --addmode VGA “1280x768_60.00”

1280x768 with 60 Hz refresh is what I wanted. The gtf command outputs the proper Modeline setting, which is fed into xrandr’s newmode. Finally the new mode is added to the display device VGA, which is my 2nd monitor.

It probably did, but it has moved…