[xmonad] Problem with Multi-head setup

[Eric Thomas]

Thanks for your followup.

What would be the correct way to set up the .xsession file?
I am trying the following:

exec /home/eric/bin/xmonad
setenv DISPLAY=beryllium:0.1 exec /home/eric/bin/xmonad

but the second display isn't loading xmonad correctly.

Eric Thomas


On Mon, Aug 24, 2009 at 3:41 PM, <wagnerdm at seas.upenn.edu> wrote:

> Here is the way I understand it.  Likely some of the following statements
> will be subtly wrong, and I apologize in advance for spreading my
> misconceptions about X.
>
> There are two distinct pieces of X called Xinerama.  One of the pieces is a
> set of library calls used for communicating the size and locations of
> physical screens in logical space within a single DISPLAY.  xmonad uses
> these library calls to break your physical screens into separate logical
> workspaces.  As such, the library called xinerama is required for multi-head
> support.
>
> However, I understand that there are other ways of controlling multiple
> monitors, in particular running several different DISPLAYs under X, one for
> each screen.  You may of course do this; then you must start a separate
> xmonad instance for each DISPLAY.  There is currently no integration for
> this; i.e. no way to send windows from one DISPLAY to another (though I hear
> rumors that some window managers do have such capabilities).
>
> Other than those two options, I am not familiar with any other way of
> driving multiple monitors.
>
> Cheers,
> ~d
>
> Quoting Eric Thomas <eric.l.m.thomas at gmail.com>:
>
>  Sorry for the noob question, but why is xinerama required for xmonad to
>> work?
>> As I understand it, xinerama just makes your multi head setup appear as
>> though there is one long screen.
>> However, I like it when my screens are treated as two different desktops.
>> Does xmonad not support this?
>>
>> Eric Thomas
>>
>>
>>
>> On Sat, Aug 22, 2009 at 4:55 PM, <wagnerdm at seas.upenn.edu> wrote:
>>
>>  Hi Eric,
>>>
>>> It sounds like you haven't got the Xinerama extension running; getting
>>> that
>>> set up is not xmonad-specific.  There are many excellent tutorials on
>>> setting up Xinerama on the web; Google should help here.  (For example,
>>> try
>>> "setting up Xinerama", which pointed me to <
>>> http://www.ibiblio.org/pub/Linux/docs/HOWTO/Xinerama-HOWTO>.)  It also
>>> depends slightly on what graphics card you are using.  If you've got an
>>> nvidia card with the proprietary nvidia drivers, check out the man pages
>>> for
>>> nvidia-xconfig; other people here may have other suggestions for other
>>> cards.
>>>
>>> Cheers,
>>> ~d
>>>
>>>
>>> Quoting Eric Thomas <eric.l.m.thomas at gmail.com>:
>>>
>>>  Hello,
>>>
>>>>
>>>> When attempting to setup xmonad on a dual setup, I cannot use the
>>>> keyboard
>>>> on the second monitor.
>>>>
>>>> The following command:
>>>> ghc -e "Graphics.X11.openDisplay [] >>=
>>>> Graphics.X11.Xinerama.getScreenInfo"
>>>>
>>>> generates this output:
>>>> Xlib:  extension "XINERAMA" missing on display ":0.1".
>>>> [Rectangle {rect_x = 0, rect_y = 0, rect_width = 1280, rect_height =
>>>> 1024}]
>>>>
>>>> In the FAQ, its says to check my Xserver configuration, but I don't know
>>>> what I need to check.
>>>>
>>>> Any help would be appreciated.
>>>>
>>>> Thanks,
>>>>
>>>> Eric
>>>>
>>>>
>>>>
>>>
>>>
>>
>
>
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