Mailinglist Archive: opensuse (2008 mails)

[Greg Freemyer <greg.freemyer@xxxxxxxxx>]

On Thu, Apr 16, 2009 at 10:24 AM, Will Stephenson <wstephenson@xxxxxxx> wrote:
> On Wednesday 15 April 2009 19:55:56 Greg Freemyer wrote:
> > When I connect up to the projector, X / KDE is not auto-detecting the
> > extra screen until I logout.
> >
> > Thus I would like to have a way to force X and/or KDE to detect the
> > projector and reconfig itself.
> >
> > Is this possible:
> >
> > from KDM login screen?
> >
> > after being logged into KDE 4.2.2?
> >
> > As I said, currently it only autodetects on logout from KDE. So if
> > I'm sitting at the KDM, I have to connect up the projector, login,
> > then logout, and login a second time. At which point I have a dual
> > screen capability.
>
> Yes, it's definitely possible (even with 4.1.3 on 11.1). A KDED module
> (kephal) watches for XRANDR events indicating that a monitor or projector
> was hotplugged and pops up a dialog shortly after the cable was connected
> asking if your desktop should be extended onto the new screen.
>
> The catch is that driver support for XRANDR events is patchy at best. nvidia
> binary is probably the worst since it only supports xrandr 1.1. I know it
> works nicely on intel 945GM on 11.1 because I presented in exactly this way
> with 11.1 at FOSDEM in February (satisfyingly, a GNOME colleague uttered a
> surprised "KDE can do /that/?!).

I have a Intel 965GM, so hopefully we can make it work.

> Does 'xrandr' show the projector after hotplug (but before logout)?

Yes

Running xrandr with the projector Disconnected

Screen 0: minimum 320 x 200, current 1024 x 768, maximum 3840 x 1200
VGA disconnected (normal left inverted right x axis y axis)
LVDS connected 1024x768+0+0 (normal left inverted right x axis y axis)
331mm x 207mm
   1024x768       60.0*+
   1280x800       60.0 +
   800x600        60.3     56.2
   640x480        59.9
TMDS-1 disconnected (normal left inverted right x axis y axis)
TV disconnected (normal left inverted right x axis y axis)


Running xrandr with the projector Connected

Screen 0: minimum 320 x 200, current 1024 x 768, maximum 3840 x 1200
VGA connected (normal left inverted right x axis y axis)
   1280x800       60.0 +   58.9
   1280x960       60.0
   1280x768       60.0     58.9
   1280x720       60.0     58.8
   1024x768       60.0     60.0     58.8
   1280x600       60.0     58.9
   1024x600       60.0     58.7
   800x600        60.3     60.0     56.2     58.7
   768x576        60.0     58.6
   640x480        59.9
LVDS connected 1024x768+0+0 (normal left inverted right x axis y axis)
331mm x 207mm
   1024x768       60.0*+
   1280x800       60.0 +
   800x600        60.3     56.2
   640x480        59.9
TMDS-1 disconnected (normal left inverted right x axis y axis)
TV disconnected (normal left inverted right x axis y axis)

> Does 'qdbus org.kde.kded /modules/kephal/Screens
> org.kde.Kephal.Screens.numScreens' reflect the number of connected displays?
As root from a console I tried:

qdbus org.kde.kded /modules/kephal/Screens org.kde.Kephal.Screens.numScreens


It never came back.  dmesg | tail did not show anything interesting.

cntrl-C did kill it.

> HTH
>
> Will

Greg
-- 
Greg Freemyer
Head of EDD Tape Extraction and Processing team
Litigation Triage Solutions Specialist
http://www.linkedin.com/in/gregfreemyer
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