Created attachment 20872 [details] Output "xrandr -q --verbose" At first, used components: Distribution: Gentoo - xorg-xserver-1.5.2 - xrandr-1.2.3 - xf86-video-ati from git (Dec, 5th 2008) Hardware: - ATI/AMD x1600 [M56]/r500 - Internal LVDS of HP nx9420 Notebook @ 1680x1050 - External LCD "Sony SDM-S73" @ 1280x1024 It is not possible connecting the 2nd display to the external VGA connector as 'RightOf' or 'LeftOf' display. The result when running xrandr --output VGA-0 --right-of LVDS --mode 1280x1024 is xrandr: screen cannot be larger than 1680x1600 (desired size 2960x1050) The output of 'xrandr -q' (--verbose can be found in attachment): ########### Screen 0: minimum 320 x 200, current 1680 x 1050, maximum 1680 x 1600 VGA-0 connected 1280x1024+0+0 (normal left inverted right x axis y axis) 359mm x 287mm 1280x1024 60.0*+ 60.0 60.0* 1280x960 60.0 60.0 1024x768 75.1 75.0 70.1 60.0 832x624 74.6 800x600 72.2 75.0 60.3 640x480 75.0 72.8 72.8 75.0 60.0 59.9 720x400 70.1 LVDS connected 1680x1050+0+0 (normal left inverted right x axis y axis) 365mm x 228mm 1680x1050 58.8*+ DVI-0 disconnected (normal left inverted right x axis y axis) ########### I can only get cropped clone mode working which isn't really of use to me when I'd like to use the 2nd display to extend my workspace.
(In reply to comment #0) > Screen 0: minimum 320 x 200, current 1680 x 1050, maximum 1680 x 1600 ^^^^^^^^^^^^^^^^^ your desktop isn't big enough to handle both screens side by side. You'll need to add a Virtual line to the display subsection of the screen section of your config in order to pre-allocate a big enough desktop for dualhead. This will be dynamic once we get the drm memory management work is done. Section "Screen" ... SubSection "Display" Depth 24 Virtual 2960 1050 EndSubSection EndSection See this page form more info: http://wiki.debian.org/XStrikeForce/HowToRandR12
Thanks a lot, got it finally working now this way. It introduced some other minor bugs which I'll report soon separately.
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