This is a step-by-step guide to enable Multiseat[http://en.wikipedia.org/wiki/Multiseat_configuration] on '''single video card''' with Xfce[http://en.wikipedia.org/wiki/Xfce] desktop environment, based on Xephyr[http://en.wikipedia.org/wiki/Xephyr] and XRandR[http://en.wikipedia.org/wiki/RandR].

== Setup ==
NOTE 1: Xfce desktop environment is enabled, Mutter based desktop environment doesn't work per testing.

NOTE 2: A lot of integration work needs to be done with uxlaunch/ConsoleKit/etc.

NOTE 3: All below commands are assumed to run with "root", you'd better "ssh" to the netbook to copy/paste some of those commands.

* 1) Install MeeGo 1.2.0 for Netbook, image is here [http://repo.meego.com/MeeGo/releases/1.2.0/images/meego-netbook-ia32/meego-netbook-ia32-1.2.0.img].

* 2) Edit /etc/inittab, change default runlevel from 5 to 3, then reboot

* 3) Setup Proxy
export http_proxy=http://<proxy_server>:<proxy_port>
export no_proxy=.intel.com,10.0.0.0/8

* 4) Setup Repo
wget http://download.meego.com/live/MeeGo:/1.2.0:/oss:/Update:/Testing/MeeGo_1.2.0/MeeGo:1.2.0:oss:Update:Testing.repo
wget http://download.meego.com/live/home:/yyin2:/branches:/MeeGo:/1.2.0:/oss:/Update:/Testing/MeeGo_1.2.0/home:yyin2:branches:MeeGo:1.2.0:oss:Update:Testing.repo
wget http://download.meego.com/live/home:/yyin2:/branches:/MeeGo:/1.2.0:/oss/standard/home:yyin2:branches:MeeGo:1.2.0:oss.repo
zypper refresh

* 5) install modified xorg-xephyr, xfce4-panel from "yyin2" repo
zypper install xorg-x11-server-Xephyr
zypper install xfce4-panel

* 6) compile & install mdm
git-clone http://git.c3sl.ufpr.br/pub/scm/multiseat/mdm.git
zypper install gcc make libX11-devel cairo-devel gettext-devel
cd mdm/mdm; make;
cp tree/usr/sbin/seat-parent-window /usr/sbin/

* 7) setup kebyoard/mouse
mkdir -p /etc/mdm/devices
ln -sf /dev/input/by-id/xxxx keyboard1
ln -sf /dev/input/by-id/xxxx keyboard2
ln -sf /dev/input/by-id/xxxx mouse1
ln -sf /dev/input/by-id/xxxx mouse2

* 8) setup X
xrandr -q # there should be at least two monitors listed out, e.g. "LVDS1", "VGA1", or else STOP here.
Xorg -configure
cp /root/xorg.conf.new /etc/mdm/xorg.conf.mdm
<add lines "Virtual 2048 2048" to /etc/mdm/xorg.conf.mdm Display section, this is the key "magic" of this guide, a big Virtual Screen will be assembled by LVDS1+VGA1, the width (or the height) should be bigger than the sum of width (or height) of LVDS1+VGA1>
nohup /usr/bin/X -config /etc/mdm/xorg.conf.mdm vt08 -logfile /etc/mdm/xorg.mdm.log -dpms -s 0 :0 >/dev/null 2>/dev/null &

* 9) run Xephyr
xrandr --output LVDS1 --mode 1024x600
xrandr --output VGA1 --mode 1024x768
xrandr --output VGA1 --right-of LVDS1

export DISPLAY=:0
seat-parent-window 1024x600+0+0 seat-parent-window0-LVDS1 &
seat-parent-window 1024x768+1024+0 seat-parent-window0-VGA1 &

xwininfo -name seat-parent-window0-LVDS1 (get the window id, e.g. 0x200001)
xwininfo -name seat-parent-window0-VGA1 (get the window id, e.g. 0x400001)

export DISPLAY=:0; Xephyr :1 -dpms -s 0 -br :1 -parent 0x200001 -mouse evdev,,device=/etc/mdm/devices/mouse1 -keybd evdev,,device=/etc/mdm/devices/keyboard1,xkbmodel=evdev,xkblayout=us -nolisten tcp vt9 &
export DISPLAY=:1; xterm & #test the keyboard/mouse of 1st seat in the terminal

export DISPLAY=:0; Xephyr :2 -dpms -s 0 -br :2 -parent 0x400001 -mouse evdev,,device=/etc/mdm/devices/mouse2 -keybd evdev,,device=/etc/mdm/devices/keyboard2,xkbmodel=evdev,xkblayout=us -nolisten tcp vt9 &
export DISPLAY=:2; xterm & #test the keyboard/mouse of 2nd seat in the terminal

* 10) run xfwm4, xfce4-panel, xfce4-session
zypper install xfce4-settings xfce4-taskmanager xfce4-mixer xfce4-battery-plugin xfce-utils xfce4-appfinder Thunar thunar-vfs thunar-volman
export DISPLAY=:1; xfwm4; xfce4-session
export DISPLAY=:2; xfwm4; xfce4-session

* 11) now you should have two seats setup, each one has its own keyboard/mouse/monitor, and you can play different videos in two seats concurrently.

== Performance ==
* Xehpyr for MeeGo has been enhanced for GL acceleration, you can simply compare the 3D performance by run the "glxgears" in native X, one Xephyr instance, two Xephyr instances. In my testing, the data are 70 FPS, 70 FPS, 50(x2) FPS respectively, no dramatic performance drop.
* Xvideo extension works in both Xephyr instances, in my testing to playing 2x480p ogv video (no hardware decoding) in two seats concurrently, it will cost about 85% CPU utilization.

== Limitation ==
* The audio output are now mixed when playing two videos/audio streams concurrently, if you have another bluetooth headset, you can run "pacmd" and move one audio stream to the bluetooth sink, so that two audio streams are separated.
* The Chromium browser will always open a new "Tab" in the 1st seat if you launch it in the 2nd seat, probably some setting in Chromium says "Always start a new '''Tab''' instead of a new '''Window'''".

Enable Multiseat support in MeeGo

2011-12-02T07:56:29Z

Yyin2: Created page with "This is a step-by-step guide to enable Multiseat[http://en.wikipedia.org/wiki/Multiseat_configuration] on '''single video card''' with Xfce[http://en.wikipedia.org/wiki/Xfce] des..."

This is a step-by-step guide to enable Multiseat[http://en.wikipedia.org/wiki/Multiseat_configuration] on '''single video card''' with Xfce[http://en.wikipedia.org/wiki/Xfce] desktop environment, based on Xephyr[http://en.wikipedia.org/wiki/Xephyr] and XRandR[http://en.wikipedia.org/wiki/RandR].

== Setup ==
NOTE 1: Xfce desktop environment is enabled, Mutter based desktop environment doesn't work per testing.
NOTE 2: A lot of integration work needs to be done with uxlaunch/ConsoleKit/etc.
NOTE 3: All below commands are assumed to run with "root", you'd better "ssh" to the netbook to copy/paste some of those commands.

* 1) Install MeeGo 1.2.0 for Netbook, image is here [http://repo.meego.com/MeeGo/releases/1.2.0/images/meego-netbook-ia32/meego-netbook-ia32-1.2.0.img].

* 2) Edit /etc/inittab, change default runlevel from 5 to 3, then reboot

* 3) Setup Proxy
export http_proxy=http://<proxy_server>:<proxy_port>
export no_proxy=.intel.com,10.0.0.0/8

* 4) Setup Repo
wget http://download.meego.com/live/MeeGo:/1.2.0:/oss:/Update:/Testing/MeeGo_1.2.0/MeeGo:1.2.0:oss:Update:Testing.repo
wget http://download.meego.com/live/home:/yyin2:/branches:/MeeGo:/1.2.0:/oss:/Update:/Testing/MeeGo_1.2.0/home:yyin2:branches:MeeGo:1.2.0:oss:Update:Testing.repo
wget http://download.meego.com/live/home:/yyin2:/branches:/MeeGo:/1.2.0:/oss/standard/home:yyin2:branches:MeeGo:1.2.0:oss.repo
zypper refresh

* 5) install modified xorg-xephyr, xfce4-panel from "yyin2" repo
zypper install xorg-x11-server-Xephyr
zypper install xfce4-panel

* 6) compile & install mdm
git-clone http://git.c3sl.ufpr.br/pub/scm/multiseat/mdm.git
zypper install gcc make libX11-devel cairo-devel gettext-devel
cd mdm/mdm; make;
cp tree/usr/sbin/seat-parent-window /usr/sbin/

* 7) setup kebyoard/mouse
mkdir -p /etc/mdm/devices
ln -sf /dev/input/by-id/xxxx keyboard1
ln -sf /dev/input/by-id/xxxx keyboard2
ln -sf /dev/input/by-id/xxxx mouse1
ln -sf /dev/input/by-id/xxxx mouse2

* 8) setup X
xrandr -q # there should be at least two monitors listed out, e.g. "LVDS1", "VGA1", or else STOP here.
Xorg -configure
cp /root/xorg.conf.new /etc/mdm/xorg.conf.mdm
<add lines "Virtual 2048 2048" to /etc/mdm/xorg.conf.mdm Display section, this is the key "magic" of this guide, a big Virtual Screen will be assembled by LVDS1+VGA1, the width (or the height) should be bigger than the sum of width (or height) of LVDS1+VGA1>
nohup /usr/bin/X -config /etc/mdm/xorg.conf.mdm vt08 -logfile /etc/mdm/xorg.mdm.log -dpms -s 0 :0 >/dev/null 2>/dev/null &

* 9) run Xephyr
xrandr --output LVDS1 --mode 1024x600
xrandr --output VGA1 --mode 1024x768
xrandr --output VGA1 --right-of LVDS1

export DISPLAY=:0
seat-parent-window 1024x600+0+0 seat-parent-window0-LVDS1 &
seat-parent-window 1024x768+1024+0 seat-parent-window0-VGA1 &

xwininfo -name seat-parent-window0-LVDS1 (get the window id, e.g. 0x200001)
xwininfo -name seat-parent-window0-VGA1 (get the window id, e.g. 0x400001)

export DISPLAY=:0; Xephyr :1 -dpms -s 0 -br :1 -parent 0x200001 -mouse evdev,,device=/etc/mdm/devices/mouse1 -keybd evdev,,device=/etc/mdm/devices/keyboard1,xkbmodel=evdev,xkblayout=us -nolisten tcp vt9 &
export DISPLAY=:1; xterm & #test the keyboard/mouse of 1st seat in the terminal

export DISPLAY=:0; Xephyr :2 -dpms -s 0 -br :2 -parent 0x400001 -mouse evdev,,device=/etc/mdm/devices/mouse2 -keybd evdev,,device=/etc/mdm/devices/keyboard2,xkbmodel=evdev,xkblayout=us -nolisten tcp vt9 &
export DISPLAY=:2; xterm & #test the keyboard/mouse of 2nd seat in the terminal

* 10) run xfwm4, xfce4-panel, xfce4-session
zypper install xfce4-settings xfce4-taskmanager xfce4-mixer xfce4-battery-plugin xfce-utils xfce4-appfinder Thunar thunar-vfs thunar-volman
export DISPLAY=:1; xfwm4; xfce4-session
export DISPLAY=:2; xfwm4; xfce4-session

* 11) now you should have two seats setup, each one has its own keyboard/mouse/monitor, and you can play different videos in two seats concurrently.

== Performance ==
* Xehpyr for MeeGo has been enhanced for GL acceleration, you can simply compare the 3D performance by run the "glxgears" in native X, one Xephyr instance, two Xephyr instances. In my testing, the data are 70 FPS, 70 FPS, 50(x2) FPS respectively, no dramatic performance drop.
* Xvideo extension works in both Xephyr instances, in my testing to playing 2x480p ogv video (no hardware decoding) in two seats concurrently, it will cost about 85% CPU utilization.

== Limitation ==
* The audio output are now mixed when playing two videos/audio streams concurrently, if you have another bluetooth headset, you can run "pacmd" and move one audio stream to the bluetooth sink, so that two audio streams are separated.
* The Chromium browser will always open a new "Tab" in the 1st seat if you launch it in the 2nd seat, probably some setting in Chromium says "Always start a new '''Tab''' instead of a new '''Window'''".

2011-07-05T07:52:18Z

Yyin2: /* Building your package using build */

This page is for people who want to avoid any connection with any OBS backend - ie "as raw as possible".

If you simply want to do a local build then you probably want "osc build" which does almost everything for you.
see [[Build_Infrastructure/Packagers_Developers]]

== Building your package using build ==

A more convenient package build way is to use 'build' which is a project from OpenSUSE, MeeGo build infrastructure used it.

You can get build binary package from http://repo.meego.com/MeeGo/tools/repos/ per your Linux distribution, if your Linux distribution isn't there, you can get build source package from http://www.gitorious.org/opensuse/build to build it yourself manually.

After you install it ( I suppose you know how to install a package on your Linux), you can run “build –help” to get help info.

You must run build as root. If your network needs proxy, please export proxy environment variables, for example:

<pre>
export http_proxy=http://proxy.yourcompany.com:8080/
export no_proxy=localhost,127.0.0.0/8,.yourcompany.com, 172.16.0.0/16
</pre>

If you used to run “sudo build …” and your network needs proxy, please ensure sudo to inherit proxy environment variables, you can do this by adding the below line to /etc/sudoers

<pre>
Defaults env_keep += "http_proxy no_proxy HTTP_PROXY NO_PROXY"
</pre>

You may also need to set correct default distro target, or use the "build --dist=/usr/lib/build/configs/meego-1.1.conf" option:
<pre>
cd /usr/lib/build/configs
sudo ln -sf meego-1.2.conf default.conf
</pre>

build also will check rpm package signature, so you must import public key of repository you're using, for example:

For http://repo.meego.com/MeeGo/releases/1.2.0/repos/oss/ia32/packages

You can get its public key for http://repo.meego.com/MeeGo/releases/1.2.0/repos/oss/ia32/packages/noarch/meego-release-1.2.0-2.1.noarch.rpm

<pre>
$ wget http://repo.meego.com/MeeGo/releases/1.2.0/repos/oss/ia32/packages/noarch/meego-release-1.2.0-2.1.noarch.rpm
$ rpm2cpio meego-release-1.2.0-2.1.noarch.rpm | cpio -idmv
$ rpm --import ./etc/pki/rpm-gpg/RPM-GPG-KEY-meego02
</pre>

This command will build a cpio binary package for MeeGo.

<pre>
build --repository http://repo.meego.com/MeeGo/releases/1.2.0/repos/oss/ia32/packages/ --arch i686 cpio-2.11-2.6.src.rpm
</pre>

Optionally, you also can use spec file to build it, for this case, build will find your source tar ball and patches under current work dir.

<pre>
build --repository http://repo.meego.com/MeeGo/releases/1.2.0/repos/oss/ia32/packages/ --arch i686 cpio.spec
</pre>

build will base your repo URL to cache your repo, so please use the same URL string for the same repo every time (URL with / at the end of it and the same URL without / at the end of it will result in different cache dirs), you can use multiple --repository options to specify multiple repos, for example:

<pre>
build --repository http://repo.meego.com/MeeGo/builds/trunk/preview/core/repos/ia32/packages/ \
--repository http://repo.meego.com/MeeGo/builds/trunk/preview/netbook/repos/ia32/packages/ \
--arch i686 cpio-2.11-2.meego.src.rpm
</pre>

The default cache dir is /var/cache/build, you can use option –cachedir to set to other dir.

The default BUILDROOT dir is /var/tmp/build-root, you can use --root option to specify one more dir, once build is done, you can get your binary package in BUILDROOT, for example:

<pre>
...
Wrote: /home/abuild/rpmbuild/SRPMS/cpio-2.11-2.meego.src.rpm
Wrote: /home/abuild/rpmbuild/RPMS/i586/cpio-2.11-2.meego.i586.rpm
Wrote: /home/abuild/rpmbuild/RPMS/i586/cpio-debuginfo-2.11-2.meego.i586.rpm
...
</pre>

Your cpio binary package is /var/tmp/build-root/home/abuild/rpmbuild/RPMS/i586/2.11-2.meego.i586.rpm

== Development your package using build ==

If you want to modify packages, such as add/modify/remove patches, you need unpack src.rpm first. Then development can be based on source code.

This command would unpack src.rpm to current directory, and your work can be in this directory.

rpm2cpio XXX.src.rpm | cpio -idmv

#If you want to add a patch, you just need copy the patch to current directory and add this patch in spec file.
#If you wan to remove patches, you just need to remove them in spec file.
#If you want to modify exist patch, you can modify the special patch and spec file need not to modify.

Once you development work is done, you can use ‘build’ command to generate new RPM based on you changes. Command as follows:

build --repository http://YYY/repos/oss/ia32/packages/ --arch i686 XXX.spec

binary RPM package can be found in /var/tmp/build-root/home/abuild/rpmbuild/RPMS/.

== Troubleshooting (ARM) ==

=== Exec format error ===
Meet this problem :

on fedora13 when using 'build' to create a armv7l rpm package.
one of reasons: maybe 'qemu-arm' is not right set.
Try command:'file /usr/bin/qemu-arm' ,and if its output show 'dynamically linked',and the problem maye is here,and it should be 'statically linked'.you can use commands 'rpm -i http://download.opensuse.org/repositories/home:/dl9pf:/qemu/Fedora_12/i386/qemu-devel-0.13git2010.06.24.1826-8.1.i386.rpm' (the package maybe changes,so you can go the web address to get it ,then install it )to reinstall this part, and maybe you will meet some problem because of its dependencies ,and you can uninstall all of them first.

on ubuntu10.04,you should install 'qemu-arm-static',use command:apt-get install qemu-arm-static

On Debian, you should install 'qemu-user-static' from Squeeze (Debian 6.0) and later.

=== rpm error ===
This problem on ubuntu 10.04 when using 'build' to create a i686 rpm package.
''Error:rpm: error while loading shared libraries: liblua-5.1.so: cannot open shared object file: No such file or directory''
Please modify the '''/usr/lib/build/configs/default.conf''' in preinstall section add liblua.--[[User:Kismeter|Kismeter]] 15:02, 2 December 2010 (UTC)

=== Nothing Provides ===
This problem on Ubuntu 10.04 when using 'build' to create a i586 package. Please Use ''build --repository http://repo.meego.com/MeeGo/builds/xxx/core/repos/ia32/packages/ --arch i686 xxxx.src.rpm''
The arch must be '''i686'''.

===chroot: cannot run command `rpm'===

when build a armv7l rpm,modify /usr/lib/build/build and /usr/lib/build/configs/meego-1.0.conf ,change armv7el to armv7l in these files,maybe /usr/lib/build/Build.pm also need change.
If problem persist, see [https://bugs.meego.com/show_bug.cgi?id=18905 bug 18905]

== Another language version of this page ==

* [[不需要obs的本地build-_简体中文]]