FreeSource - AltLinux/Dokumentacija/Multistation

2007-12-14 22:22:47

�� /Alt Linux / Dokumentacija / Multistation �� 2007-12-14 22:22:47 � 2008-07-10 16:30:42

��:

�� altlinux.org. �� freesource.info ��.

%% Dual-seat X on a dual-head graphics card using Xgl
1. Introduction
This document describes how you can use a dual-head graphics card to create
a dual-seat X configuration. The approach is very general and can easily be
extended to more seats, creating a multi-seat X configuration.
The dual-seat configuration is created by starting a 'master' X server which
initializes the two monitors connected to the video card. On each screen,
an Xgl server is then started and using a separate program, events from
keyboards and mice are redirected to the appropriate Xgl servers.
2. Disclaimer
This document is distributed in the hope that it will be useful, but without
any warranty. The information in this document is correct to the best of my
knowledge, but there's a always a chance I've made some mistakes, so don't
follow everything too blindly, especially if it seems wrong. Nothing here
should have a detrimental effect on your computer, but just in case I take
no responsibility for any damages incurred from the use of the information
contained herein.
3. Configuring the 'master' X server
Here are some sections from my own xorg.conf file, illustrating how two
monitors can be controlled by the main X server. Adjust where needed.
I've defined two monitor sections:

Section “Monitor”
Identifier «My Monitor 0?"
Horiz Sync? 31.5 – 64.3
Vert Refresh? 40–65
End Section?
Section “Monitor”
Identifier «My Monitor 1?"
Horiz Sync? 31.5 – 64.3
Vert Refresh? 40–65
End Section?

Two devices, corresponding to the two outputs of my video card:

Section “Device”
Identifier “nvidia0”
Driver “nvidia”
Bus ID? "PCI:01:00:0"
Screen 0
Option "Use Display Device?" “CRT-1”
Option "Render Accel?" “true”
End Section?
Section “Device”
Identifier “nvidia1”
Driver “nvidia”
Bus ID? "PCI:01:00:0"
Screen 1
Option "Use Display Device?" “CRT-0”
Option "Render Accel?" “true”
End Section?

Two screens, each one connecting a device to a monitor:

Section “Screen”
Identifier "Screen 0?"
Device “nvidia0”
Monitor «My Monitor 0?"
Default Depth? 24
Subsection “Display”

Depth 24
Modes “1280x1024”
View Port? 0 0

End Subsection?
End Section?
Section “Screen”
Identifier "Screen 1?"
Device “nvidia1”
Monitor «My Monitor 1?"
Default Depth? 24
Subsection “Display”

Depth 24
Modes “1280x1024”
View Port? 0 0

End Subsection?
End Section?

Finally, the server layout tells the X server to actually use both
screens.

Section "Server Layout?"
Identifier "Layout 1?"
Screen 0 "Screen 0?"
Screen 1 "Screen 1?" rightOf "Screen 0?"
Input Device? "Keyboard 1?" "Core Keyboard?"
Input Device? "Mouse 1?" "Core Pointer?"
End Section?

4. Helper programs
4.1 Xgl Script?.sh
You may have to adjust some settings in the script to reflect your own
configuration. Note that if you don't copy the Xgl Script?.sh file in
/usr/local/sbin, you'll have to adjust the 'command' lines in the gdm.conf
settings below.
4.2 Xevdev Script?.sh
Here too, you may have to adjust some settings at the top of the script.
The gdm.conf settings below assume that this script is installed in the
directory /usr/local/sbin.
4.3 The 'startsched' program
This allows you to start a program with a higher priority. Something
like the 'nice' program, but with real-time priorities. I've found
it helpful to start 'xevdevserver' with a real-time priority, to make
sure that input events are handled right away. The Xgl Script?.sh and
Xevdev Script?.sh files look in /usr/local/sbin/ for this program,
unless you modify the scripts.
To compile the program, simply type:
gcc -o startsched startsched.c
4.4 Xevdev Server?
This program can capture a keyboard and mouse, and redirect the events
to a specified X display.
Compile xevdevserver and copy the executable to any location you like. I've
installed mine in /usr/local/sbin and this is the default location in
the Xgl Script?.sh and Xevdev Script?.sh files. You'll need xevdevserver-1.3.0
for the scripts to work.
5. GDM configuration
5.1 First approach
In this approach, the main X server is started first. Then, when each Xgl
server is started, an xevdevserver instance is started at the same time.
In the [daemon] section, set:

Always Restart Server?=true

For the servers you'll have to do something like this:

[servers]
0=Main Server?
1=Xgl 1?
2=Xgl 2?
[server-Main Server?]
name=Main Server?
command=/usr/X11R6/bin/Xorg
handled=false
flexible=false
[server-Xgl 1?]
name=Xgl 1?
command=/usr/local/sbin/XglScript.sh -display :0.1 -keyboard /dev/input/event4 -mouse /dev/input/event1 -dpi 86 -fullscreen -ac -accel glx:pbuffer -accel xv:pbuffer -xkbmap be -softcursor
handled=true
flexible=false
[server-Xgl 2?]
name=Xgl 2?
command=/usr/local/sbin/XglScript.sh -display :0.0 -keyboard /dev/input/event2 -mouse /dev/input/event0 -dpi 86 -fullscreen -ac -accel glx:pbuffer -accel xv:pbuffer -xkbmap be
handled=true
flexible=false

5.2 Second approach
In this second approach, all the required xevdevserver instances are started
even before the actual main X server is started. These xevdevserver instances
keep trying to connect to their Xgl servers, so shortly after an Xgl server
has been started, it will receive the input from the corresponding
xevdevserver.
In the [daemon] section, set:

Always Restart Server?=true

For the servers you'll have to do something like this:

[servers]
0=Main Server?
1=Xgl 1?
2=Xgl 2?
[server-Main Server?]
name=Main Server?
command=/usr/local/sbin/XevdevScript.sh -xevdev «:1,/dev/input/event4,/dev/input/event1» -xevdev «:2,/dev/input/event2,/dev/input/event0»
handled=false
flexible=false
[server-Xgl 1?]
name=Xgl 1?
command=/usr/local/sbin/XglScript.sh -display :0.1 -dpi 86 -fullscreen -ac -accel glx:pbuffer -accel xv:pbuffer -xkbmap be -softcursor
handled=true
flexible=false
[server-Xgl 2?]
name=Xgl 2?
command=/usr/local/sbin/XglScript.sh -display :0.0 -dpi 86 -fullscreen -ac -accel glx:pbuffer -accel xv:pbuffer -xkbmap be
handled=true
flexible=false

The script Xevdev Script?.sh accepts parameters like

xevdev «:1,/dev/input/event4,/dev/input/event1»

This means that an xevdevserver will be started, redirecting input events
from the keyboard device /dev/input/event4 and mouse device
/dev/input/event1 to the Xgl display :1
5.3 General remarks
Make sure you adjust the input devices and your keyboard map. Instead
of using identifiers like /dev/input/event0, you can also use other
identifiers listed in /proc/bus/input/devices. For example, for an
entry like

I: Bus=0003 Vendor=045e Product=0040 Version=0300
N: Name="Microsoft Microsoft 3-Button Mouse with Intelli Eye?™"
P: Phys=usb-0000:00:03.0–1/input0
S: Sysfs=/class/input/input0
H: Handlers=mouse0 event0
B: EV=7
B: KEY=70000 0 0 0 0 0 0 0 0
B: REL=103

you can use

mouse usb-0000:00:03.0–1/input0

or even

mouse «Microsoft Microsoft 3-Button Mouse with Intelli Eye?™"

and something similar for '-xevdev' arguments.
The script Xgl Script?.sh will translate such identifiers to an appropriate
device name like /dev/input/event0. Be careful when using the 'Name'
identifier as this might not be unique.
Unfortunately only one of the monitors connected to a single card can use
the hardware cursor, which is why the software cursor has been enabled in
one of the Xgl instances. I'm not sure which 'accel' options are best, you
can always take a look at http://www.freedesktop.org/wiki/Software_2fXgl
for some other settings.

2007-10-18 14:10:38

�� /Alt Linux / Dokumentacija / Multistation �� 2007-10-18 14:10:38 � 2007-12-14 22:22:47

��:

��

1. �� Xgl �� Xephyr
http://research.edm.uhasselt.be/~jori/page/index.php?n=Misc.DualSeatX

2007-10-15 17:00:01

�� /Alt Linux / Dokumentacija / Multistation �� 2007-10-15 17:00:01 � 2007-10-18 14:10:38

��:

�� display manager � /etc/sysconfig/desktop : �� gdm — GNOME, �� kdm — KDE.

2007-10-11 12:25:07

�� /Alt Linux / Dokumentacija / Multistation �� 2007-10-11 12:25:07 � 2007-10-15 17:00:01

��:

�� , �� – �� . Multiseat, multistation, multiterminal – �� , �� , �� (�� multihead workstation). ��, �� , �� . ��, �� , �� (��) � USB �� PS/2 �� .

��:

�� , �� – �� . Multiseat, multistation, multiterminal – �� , �� , �� . ��, �� , �� . ��, �� , �� (��) � USB �� PS/2 �� .

2007-10-11 11:55:35

�� /Alt Linux / Dokumentacija / Multistation �� 2007-10-11 11:55:35 � 2007-10-11 12:25:07

��:

�� device id �� , �� event id � �� .
�� -�� Sisyphus:
apt-get install multistation-scripts
%%

��:

�� device id �� -�� , �� event id � �� .
�� kdm �� . ��
cat /proc/bus/input/devices

2007-10-11 11:49:52

�� /Alt Linux / Dokumentacija / Multistation �� 2007-10-11 11:49:52 � 2007-10-11 11:55:35

��:

&&
&&

2007-10-10 17:04:53

�� /Alt Linux / Dokumentacija / Multistation �� 2007-10-10 17:04:53 � 2007-10-11 11:49:52

��:

�� X � �� :
�� X-�� xorg.conf
�� , �� . ��, � �� , �� .
��, �� :
&&
# cat /proc/bus/input/devices
I: Bus=0011 Vendor=0001 Product=0001 Version=ab41
N: Name="AT Translated Set 2 keyboard"
P: Phys=isa0060/serio0/input0
S: Sysfs=/class/input/input0
H: Handlers=kbd event0
B: EV=120013
B: KEY=4 2000000 3802078 f840d001 f2ffffdf ffefffff ffffffff fffffffe
B: MSC=10
B: LED=7
I: Bus=0011 Vendor=0002 Product=0005 Version=0000
N: Name="Im PS / 2? Generic Wheel Mouse"
P: Phys=isa0060/serio1/input0
S: Sysfs=/class/input/input1
H: Handlers=mouse0 event1 ts0
B: EV=7
B: KEY=70000 0 0 0 0 0 0 0 0
B: REL=103
I: Bus=0010 Vendor=001f Product=0001 Version=0100
N: Name="PC Speaker"
P: Phys=isa0061/input0
S: Sysfs=/class/input/input2
H: Handlers=kbd event2
B: EV=40001
B: SND=6
I: Bus=0003 Vendor=0d62 Product=001c Version=0202
N: Name="Darfon USB Combo Keyboard"
P: Phys=usb-0000:00:1d.1–1/input0
S: Sysfs=/class/input/input5
H: Handlers=kbd event4
B: EV=120003
B: KEY=10000 7 ff87207a c14057ff febeffdf ffefffff ffffffff fffffffe
B: LED=7
I: Bus=0003 Vendor=0d62 Product=001c Version=0202
N: Name="Darfon USB Combo Keyboard"
P: Phys=usb-0000:00:1d.1–1/input1
S: Sysfs=/class/input/input6
H: Handlers=kbd event5
B: EV=3
B: KEY=3078 d801d101 1e0000 0 0 0
I: Bus=0003 Vendor=046d Product=c03f Version=2000
N: Name="Logitech USB-PS/2 Optical Mouse"
P: Phys=usb-0000:00:1d.1–2/input0
S: Sysfs=/class/input/input8
H: Handlers=mouse1 event3 ts1
B: EV=7
B: KEY=f0000 0 0 0 0 0 0 0 0
B: REL=103
&&
�� , �� , �� , �� event id. �� /usr/sbin/Xephyr.sh �� -�� xephyr:
#!/bin/bash
# 20060905 – josean – added get_event() function to obtain eventNN from a physical address
# Original version:
# http://en.wikibooks.org/wiki/Multiterminal_with_Xephyr
# http://www.c3sl.ufpr.br/multiterminal/howtos/Xephyr.sh
trap "" usr1
XEPHYR=/usr/local/bin/Xephyr
get_event()
{

evento=`grep -A2 $1 /proc/bus/input/devices | grep 'H: Handlers=' | grep --only-matching -e 'event[0–9]*'`

}
args=()
while [ ! -z "$1" ]; do
if [[ "$1" == “-xauthority” ]]; then

shift
if [ ! -z "$1" ]; then

export XAUTHORITY="$1"

elif [[ "$1" == “-display” ]]; then

shift
if [ ! -z "$1" ]; then

export DISPLAY="$1"

elif [[ "$1" == “-kbdphys” ]]; then

shift
if [ ! -z "$1" ]; then

get_event $1
args=("${args[@]}" “-keyboard”)
args=("${args[@]}" «/dev/input/$evento»)

elif [[ "$1" == “-mousephys” ]]; then

shift
if [ ! -z "$1" ]; then

get_event $1
args=("${args[@]}" “-mouse”)
args=("${args[@]}" «/dev/input/$evento,5»)

else

if ! expr match $1 'vt[0–9][0–9]*' >/dev/null; then

args=("${args[@]}" "$1")

fi
shift
done
# echo $XEPHYR "${args[@]}" >> /tmp/logXephyr
exec $XEPHYR "${args[@]}"
�� device id �� -�� , �� event id � �� .
�� xephyr c evdev � �� kdm (�� gdm, �� )

��:

�� X � �� . �� X-�� xorg.conf:
�� , �� . �� xephyr c evdev � �� kdm (�� gdm, �� )

2007-09-28 14:59:36

�� /Alt Linux / Dokumentacija / Multistation �� 2007-09-28 14:59:36 � 2007-10-10 17:04:53

��:

�� , �� . �� xephyr c evdev � �� kdm (�� gdm, �� )

��:

�� , �� . �� xephyr � �� kdm (�� gdm, �� )

2007-09-28 13:51:33

�� /Alt Linux / Dokumentacija / Multistation �� 2007-09-28 13:51:33 � 2007-09-28 14:59:36

��:

��: �� legacy-�� : �� , ��
�� . �� Sony �� . � �� – LG:

Display Size? 330 240

��:

��: �� lagacy-�� : ��
�� . �� xorg.conf

FreeSource - AltLinux/Dokumentacija/Multistation

2007-12-14 22:22:47

2007-10-18 14:10:38

������

2007-10-15 17:00:01

2007-10-11 12:25:07

2007-10-11 11:55:35

2007-10-11 11:49:52

2007-10-10 17:04:53

2007-09-28 14:59:36

2007-09-28 13:51:33

��