<div class="gmail_quote">On Tue, Oct 13, 2009 at 3:27 PM, Adam Jackson <<a href="mailto:ajax@redhat.com" target="_blank">ajax@redhat.com</a>> wrote: <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> <div>On Sat, 2009-10-10 at 11:55 +0100, Ivo Anjo wrote: > Hello. > > Recently I tried to connect my laptop to some projectors that use > rather long VGA cables. > Running "xrandr" shows the VGA output to be disconnected, so I cannot > turn on the VGA output, and cannot use the projector. I have no > problems using the VGA output to connect to monitors and some other > projectors. </div>$ gtf 1024 768 60 | grep -i modeline Modeline "1024x768_60.00" 64.11 1024 1080 1184 1344 768 769 772 795 -HSync +Vsync $ xrandr --newmode 1024x768 64.11 1024 1080 1184 1344 768 769 772 795 -HSync +Vsync $ xrandr --addmode VGA1 1024x768 $ xrandr --output VGA1 --mode 1024x768 - ajax </blockquote></div> Thanks for your answer. The problem with that approach is that the output still shows up for me as disconnected: $ xrandr Screen 0: minimum 320 x 200, current 2048 x 768, maximum 2048 x 2048 VGA1 disconnected 1024x768+1024+0 (normal left inverted right x axis y axis) 0mm x 0mm 1024x768_60 60.0* LVDS1 connected 1024x600+0+0 (normal left inverted right x axis y axis) 195mm x 113mm 1024x600 60.0*+ 800x600 85.1 72.2 75.0 60.3 56.2 640x480 85.0 72.8 75.0 59.9 720x400 85.0 640x400 85.1 640x350 85.1 which has the unfortunate side effect of the output still being ignored by the kde screen management daemon, kephal: $ qdbus org.kde.Kephal /modules/kephal/Outputs isActivated VGA1 false $ qdbus org.kde.Kephal /modules/kephal/Outputs isConnected VGA1 false which causes the output to be ignored by kwin (acts as if the output wasn't there) and plasma (doesn't extend my desktop or wallpaper to that output). I don't think the KDE daemon is really wrong on this one, after all it *is* marked as disconnected... but I don't know the solution here either -- should the driver lie? or should the daemon be able to ignore what the driver says? Ivo Anjo