Separate X servers on separate monitors

[Adrian Allen]

Hey, thanks!

I was trying the ZaphodHeads option yesterday but must have been doing
something wrong with the syntax.

I'm much, much closer to where I want to be - however, I am having a hard
time defining which screen the keyboard and mouse should be attached to.

I've stopped and started my graphical applications a few times in the same
order with the same arguments, and the mouse has so far been stuck on the
secondary screen (I need it on the primary VGA monitor, not the secondary
HDMI), while the keyboard seems to randomly attach to one or the other.  I
can't seem to control this.

Here's the xorg.config I'm now using:


Section "ServerLayout"
Identifier     "default"
Screen      0  "Screen0" 0 0
Screen    1  "Screen1" 0 0
InputDevice    "Mouse0" "CorePointer"
InputDevice    "Keyboard0" "CoreKeyboard"
EndSection

Section "Monitor"
Identifier   "VGA1"
Option     "PreferredMode" "1280x1024"
Option     "Position" "0 0"
EndSection

Section "Monitor"
Identifier   "HDMI1"
Option     "PreferredMode" "1280x1024"
Option     "Position" "1280 0"
EndSection

Section "Device"
Identifier  "Card0"
Driver      "intel"
BusID       "PCI:0:2:0"
Screen    0
Option    "Monitor-VGA1" "VGA1"
Option    "ZaphodHeads" "VGA1"
EndSection

Section "Device"
Identifier  "Card1"
Driver      "intel"
BusID       "PCI:0:2:0"
Screen    1
Option    "Monitor-HDMI1" "HDMI1"
Option    "ZaphodHeads" "HDMI1"
EndSection

Section "Screen"
Identifier "Screen0"
Device     "Card0"
Monitor   "VGA1"
EndSection

Section "Screen"
Identifier "Screen1"
Device     "Card1"
Monitor    "HDMI1"
EndSection



On Thu, Dec 17, 2015 at 1:29 PM Jason Kim <jason at userful.com> wrote:

> Only one Xorg can be started on each PCI entity. You can not start two
> Xorg servers on your intel HD 4400.
>
> Use Xephyr/Xnest to start on each head.. You can get more info with
> googling "Multiseat Linux".
>
> If you want independent screens, not the independent displays, use zaphod
> mode, so that you can get :0.0 and :0.1.
> You need to add once more Screen in the serverlayout section;
>
> Section "ServerLayout"
>         Identifier     "default"
>         Screen      0  "Screen0" 0 0
>         Screen      1  "Screen1" 0 0
>         InputDevice    "Mouse0" "CorePointer"
>         InputDevice    "Keyboard0" "CoreKeyboard"
> EndSection
>
>
> On 15-12-17 01:08 PM, Adrian Allen wrote:
>
> Greetings -
>
> For the past few days I've been trying to configure what used to be the
> default behavior (a separate X server for each connected physical
> monitor).  It would be even better if the mouse were constrained to one of
> those displays (don't really care which).
>
> I'm working on this configuration in a Scientific Linux 6.5 system on an
> Intel i3-4170 CPU with integrated Intel HD Graphics 4400 (device 041e in
> lspci).
>
> The issue is that, apparently no matter how I configure things, I cannot
> get any given X screen to not slurp up both attached monitors.
>
> The current (mess of) xorg.conf I'm trying is (leaving out the input
> device definitions etc):
>
> Section "ServerLayout"
>         Identifier     "default"
>         Screen      0  "Screen0" 0 0
>         InputDevice    "Mouse0" "CorePointer"
>         InputDevice    "Keyboard0" "CoreKeyboard"
> EndSection
>
> Section "ServerLayout"
>         Identifier     "secondary"
>         Screen      1  "Screen1" 1280 0
> EndSection
>
> Section "Monitor"
>         Identifier   "VGA1"
>         Option       "PreferredMode"    "1280x1024"
>         Option       "Position"         "0 0"
> EndSection
>
> Section "Monitor"
>         Identifier   "HDMI1"
>         Option       "PreferredMode"    "1280x1024"
>         Option       "Position"         "1280 0"
> EndSection
>
> Section "Device"
>         Identifier  "Card0"
>         Driver      "intel"
>         BusID       "PCI:0:2:0"
>         Screen      0
>         Option      "Monitor-HDMI1"     "HDMI1"
> EndSection
>
> Section "Device"
>         Identifier  "Card1"
>         Driver      "intel"
>         BusID       "PCI:0:2:0"
>         Screen      1
>         Option      "Monitor-VGA1"      "VGA1"
> EndSection
>
> Section "Screen"
>         Identifier "Screen0"
>         Device     "Card0"
>         Monitor    "HDMI1"
> EndSection
>
> Section "Screen"
>         Identifier "Screen1"
>         Device     "Card1"
>         Monitor    "VGA1"
> EndSection
>
>
> I've tried many other permutations of an xorg.conf and I just can't get it
> to not attach both screens to :0.
>
> I want one Xserver running on :0 and another on :1, with one monitor
> attached to each screen.
>
> Can anyone point me in the right direction and/or tell me what I'm doing
> wrong with the above config?
> --
>
> Adrian Allen
>
> Systems Engineer
>
> Envysion, Inc.
>
> 100 Superior Plaza Way, Suite 260
>
> Superior, CO 80027
>
> D: 303.590.2381
>
> www.envysion.com | Visit our blog
>
>
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-- 

Adrian Allen

Systems Engineer

Envysion, Inc.

100 Superior Plaza Way, Suite 260

Superior, CO 80027

D: 303.590.2381

www.envysion.com | Visit our blog
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