Re: [gentoo-user] Very OT - Displaylink adapter and setting up X

[Michael Mol <mikemol@gmail.com>]

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On 07/06/2013 01:31 PM, Michael Mol wrote:
> On 03/14/2012 08:11 AM, Robert David wrote:
>> V Mon, 12 Mar 2012 17:24:47 -0500
>> Michael Sullivan <msulli1355@gmail.com> napsáno:
>>
>>> I feel really stupid asking this, but I want to use an HDMI component
>>> to output one of my PCs to the TV set.  I've followed all of the wiki
>>> entry at http://wiki.gentoo.org/wiki/DisplayLink, but there's
>>> something else I need to know.  I get the green screen on the TV that
>>> it mentions when the kernel module is being loaded correctly.  The
>>> problem is that I use gdm in /etc/conf.d/xdm DISPLAYMANAGER variable
>>> to start X, and I don't know where the actual gdm configuration lives
>>> so I can tell it to use ~/.xinitrc2 from the wiki.  My google
>>> searching hasn't been going well. Can anybody give me any hints as to
>>> how to make progress on this problem?
>>>
>> Hi Michael,
>>
>> it depends on how you would like to use the external card. Please
>> specify your scenario. 
> So my laptop has a built-in display and a VGA output. While working, I
> use both. In fact, here's the content of the script I run when logging
> in to arrange things the way I like them:
>
> #!/bin/sh
> xrandr --output LVDS1 --auto
> xrandr --output VGA1 --off # Force a full reset of VGA1
> xrandr --output VGA1 --left-of LVDS1 --auto
>
>
> Let's say I were able to set up the DisplayLink adapter using "xrandr
> --output FBUSB1 --auto". The effect I'm looking for could then be
> achieved via:
>
> #!/bin/sh
> xrandr --output LVDS1 --auto
> xrandr --output VGA1 --off
> xrandr --output VGA1 --left-of LVDS1 --auto
> xrandr --output FBUSB1 --off
> xrandr --output FBUSB1 --left-of VGA1 --auto
>
> In effect, I want all three displays arranged as part of the same
> extended desktop with xinerama. (xinerama is pretty explicitly part of
> my workflow, as one thing I often do is have 3-4 remote desktops active
> *per local display*, and I drag them around as necessary.
>
>> Anyway, try to look in /etc/gdm, /etc/init.d/xdm, /etc/X11 (there can
>> be specified which server start in file xdm/Xservers)
>>
>> I have DL adapter connected to my docking station and a simple script
>> to activate the second xserver on docking and deactivate that when
>> undocking. I simply run here second desktop using x2x. I just use that
>> primary for web browser, so I dont need xinerama.
>>
>> You can also use DL with your primary card and xinerama. But it needs
>> specific xorg.conf and needs to be connected when xserver starting. So
>> nothing suitable for notebook and hotplug.
> This latter scenario is what I'd be interested in. I'd have no
> complaints if I needed it plugged in when X started; that's fine, if a
> bit weird. (though it couldn't be done via xrandr? Seriously?)
>
> I don't do anything with hotplug, really. I don't use PulseAudio, I
> don't use GNOME, KDE or udev automount. About the only automagic thing I
> use is NetworkManager (and even that fails to notice when the laptop's
> moved five miles away from the AP it was connected to.).
>
>

Whups. That was the wrong thread. :)



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