[Wlug] Xinerama issues with Fedora Core 8...

[Tim Keller]

So... if I'm reading this right... I'm stuck then... since I have monitors
on separate video cards.

I know it's cool that xrandr can do all this funky stuff, but I'd just be
happy to keep existing functionality.

What are my options now... downgrade my X server?

On Nov 19, 2007 1:34 PM, Chuck Anderson <cra at wpi.edu> wrote:

> On Mon, Nov 19, 2007 at 01:07:54PM -0500, Tim Keller wrote:
> > As far as I can tell... Xinerama support is totally borked in Fedora
> Core
> > 8.  Has anybody come across any solutions?
>
> Xinerama is no longer supported in Xorg.  But not to fear!  It has
> been replaced by a new, dynamic method of doing dual-head with the
> XRandR extension.  Unfortunately, neither the Release Notes nor the
> system-config-display tool have taken these changes into account.
> Also, this won't work with multiple separate video cards, only single
> video cards with multiple output on them.  The fact that the X server
> segfaults when configured with Xinerama is a bug.
>
> You can turn on/off and configure multiple displays all dynamically
> using the xrandr command.  Try this to display the available outputs
> while the X server is running:
>
> xrandr
>
> To configure a specific output, try these commands:
>
> xrandr --output DVI-1 --auto
>
> Or:
>
> xrandr --output DVI-1 --mode 1024x768
>
> To configure dual-head (NOTE: You have to pre-configure the maximum
> combined virtual resolution you want to use in xorg.conf first, as
> specified below):
>
> xrandr --output DVI-1 --right-of DVI-0
>
> This is nice because it means you can dynamically set up dual-head for
> an external VGA port on a laptop going to an LCD projector, for
> example.  The internal LCD and external VGA could run at different
> resolutions too.
>
> For more fun, you can play with rotating screen images.
>
> You can also configure this in xorg.conf.  The key differences from
> traditional multi-head and Xinerama are that you only use a single
> Screen in your ServerLayout section:
>
> Section "ServerLayout"
>        Identifier     "new dual-head configuration"
>        Screen      0  "Screen0" 0 0
>        InputDevice    "Keyboard0" "CoreKeyboard"
> EndSection
>
> Then refer to multiple monitors in the Device section.  Here the
> format is Option "Monitor-<actual-monitor-id-from-xrandr>"
> "<monitor-identifier>"
>
> Section "Device"
>        Identifier  "Videocard0"
>        Driver      "radeon"
>        Option      "Monitor-DVI-0" "first"
>        Option      "Monitor-DVI-1" "second"
> EndSection
>
> Then specify the multiple Monitor sections themselves, using the
> monitor-identifiers specified above, with the placement options
> RightOf or LeftOf:
>
> Section "Monitor"
>        Identifier  "first"
> EndSection
>
> Section "Monitor"
>        Identifier  "second"
>        Option      "RightOf" "first"
> EndSection
>
> And then of course the single screen section.  Note that you MUST
> specify the Virtual resolution as the sum of the resolutions of the
> multiple monitors you want to use (either horizontally or vertically,
> depending on your preferred monitor orientation).  So below I have
> specified Virtual 3200 1200 so that I can place two 1600x1200 monitors
> side-by-side.  The Monitor "first" is there just to satisfy the
> requirement for a Monitor to be specified--you don't put both monitors
> here.
>
> Section "Screen"
>        Identifier "Screen0"
>        Device     "Videocard0"
>        Monitor    "first"
>        DefaultDepth     24
>        SubSection "Display"
>                Viewport   0 0
>                Virtual 3200 1200
>                Depth     24
>                Modes    "1600x1200" "1600x1024" "1440x900" "1400x1050"
> "1360x768" "1280x1024" "1280x960" "1280x800" "1280x720" "1152x864"
> "1024x768" "800x600" "640x480"
>        EndSubSection
> EndSection
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