Posts tagged with ubuntu

Compaq mini 700

This is a recent netbook release, which is a clone of the HP mini note 1000, but seems to be available overseas only. Compared to the Eeepc and Acer, it wins great points in terms of style. If an iphone and a macbook had a baby, this is what it would look like. With a full sized, comfortable keyboard, and nicely responsive mouse, the look and feel make it the nicest netbook I've had the pleasure of using. I've heard some people complain that the casing may not be as sturdy as the Acer and Asus, but I have not seen any issues yet. Perhaps a few years on, there might indeed be issues with the thinness at some places on the case, but I'll give up a little sturdiness for the pleasure of looking at this beauty and day of the week.


Though like other netbooks, the mouse buttons are on the sides, this seems to work allright with this model, and I'm not sure why, though maybe its because they are plenty big. The speakers are in a grill that fits along the bottom, where the keyboard and screen meet. The speakers won't win any awards, but not only do they look good, they sound is great too.


 


compaq mini 700

 


In terms of performance, it is quite similar to other Atom powered netbooks, with 1 gigabyte of ram, being more than sufficient to run Ubuntu or Windows XP. Ubuntu Intrepid ran out of the box, and hummed along nicely, with about 4 hours of battery life. The webcam worked out of the box too, which was a nice surprise as this wasn't the case with the Acer or Eee PC. This model seems to be about 100 € cheaper than the HP which will release next month here in Europe and the UK, but it seems it will just be a matter of branding, as the specs seem to be identical. Perhaps the main difference will be the size of the hard drive, which at 60 gigabytes is a little on the small side, but keeping discipline by putting video and music files on external drives seems to be a good idea anyway, so I don't see that as much of a problem. The HP mini note will probably have a 180 gigabyte drive, and 3 usb connections as opposed to 2 (one is disabled on the compaq mini.)


Going quickly back to running on ubuntu there were no problems with sound drivers, wifi drivers, or keypad and touchpad. It just all seemed to work out of the box. The screen at 10.2 inches is nicely widescreen and the perfect size for both work and play (watching movies, listening to music)


I'd definitely recommend this for anyone looking to use a netbook with Linux.


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Wacom Cintiq on Intrepid and Jaunty

Wacom tablets have become the staple food product of any half decent designer or design house. For illustration they are second to non, and work well with both vector based and bitmap based software. For years, the wacom tablet was considered the tool of the Mac designer, and then started becoming more widely available on the PC market. Finally, in recent years it has become both installable and quite usable in the Linux world, with programs like Gimp and Inkscape.


Something happened though, in between Hardy and Intrepid, which made the whole process much easier, but also more prone to not working properly This guide should attempt to make it easy to install the tablet without trying anything fancy. It still requires manual steps and playing with the command line, but most people will have realized that that's just the way of the world with Linux sometimes. Finally I am also going to attempt to connect it to a olpc XO laptop, which should not be much more complicated than connecting to a regular laptop, though I'll leave that excercise for another day. I am talking about the Wacom Cintiq tablets here by the way, you know, the kind that has a LCD screen that you draw on, perfect for illustrating cartoons of faces and the like. And to be specific the instructions here are for the 12 " model with usb connectors to the computer.


If you are using Ubuntu Intrepid 8.10, there is a bug that will cause freezes in the tablet, so download these community packages, instead of the ones from the repos, by putting their addresses in your browser:


http://help.ubuntu.com/community/Wacom?action=AttachFile&do=get&target=xserver-xorg-input-wacom_0.8.1.6-1ubuntu2_i386.deb


http://help.ubuntu.com/community/Wacom?action=AttachFile&do=get&target=wacom-tools_0.8.1.6-1ubuntu2_i386.deb


To make sure Hal doesn't automatically pick up your wacom cintiq tablet, remove the non working (at least for cintiqs) policy file:


sudo rm /usr/share/hal/fdi/policy/20thirdparty/10-wacom.fdi

Next we put in the relevant details in our xorg.conf including disabling hal hot-plugging (which does more harm than good for the cintiq while its being used.):


Section "ServerFlags"
Option "AutoAddDevices" "False"
EndSection

Section "InputDevice"
Driver "wacom"
Identifier "stylus"
Option "Device" "/dev/input/wacom" # USB ONLY?
Option "Type" "stylus"
Option "USB" "on" # USB ONLY
EndSection

Section "InputDevice"
Driver "wacom"
Identifier "eraser"
Option "Device" "/dev/input/wacom" # USB ONLY?
Option "Type" "eraser"
Option "USB" "on" # USB ONLY
EndSection

Section "InputDevice"
Driver "wacom"
Identifier "pad"
Option "Device" "/dev/input/wacom" # USB ONLY
Option "Type" "pad"
Option "USB" "on" # USB ONLY
EndSection

Section "ServerLayout"
Identifier "Default Layout"
Screen "Default Screen"
InputDevice "stylus" "SendCoreEvents"
InputDevice "eraser" "SendCoreEvents"
InputDevice "pad" # For Intuos3/CintiqV5/Graphire4/Bamboo tablets
EndSection

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Graz - sugar and XO deployment feedback


On Monday 19th January, the olpc.at group  was scheduled to meet 6 educators in various fields for a combined workshop, and mutual feedback session.  The meeting was off to a rocky start with neither collaboration via the local AP working, nor many of the apps on the Ubuntu sugar stick running well. On previous days I had tested many of the apps and found them to be non-functional or wrongly sized for the resolution, or lacking network neighbourhood views.

This turned out to be  an advantage in a way, as it brought up a discussion on what the educators present would like to see happen in terms of customised activities and collaborative possibilities. I'll try and list them in some organised fashion, based on activity.

  •  Flipsticks activtiy

The first activity that was questioned was flipsticks, which was seen as a great tool for younger kids, but lacking collaborative abilities. An idea which was brought up was splitting the flipsticks work into user groups, and have the groups then combine their animations to create a bigger final animation. The reasoning behind this was that often there is not much time in a class, and to have every student to their little bit, and then combine it all is much more efficient, and a lesson in collaboration at the same time.


  •  Geoquiz and other visual quiz activities

Another suggestion that came after showing Geoquiz was the development of some sort of authoring tool for this kind of activity, which generally involves showing images and asking questions. This could then be applied for many localised activities. In the case of Austria, for example, children of a younger age learn about Austria itself, in a geographical sense, but not too much about the rest of the planet until they are older. The Geoquiz activity as it stands was criticised for not telling a user when an answer is correct or wrong, for not having good controls, and for having unchangable content. The other option that would be a requirement for these kind of activities is a score card or report that the teacher could somehow store and print, based on children collaborating on quiz type activities. It is good to know that there are currently Sugar developers that are working on implementing some of these features, and really make a generic quiz generator that could be used for any subject.


  •  Other Quiz type examples that were brought up

Examples of quiz type activities that were brought up were types of flowers, the environment, nature, animals, the house, etc.


  •  Main subject matter requested as simple activities with lesson plans

The main subjects that were requested were German (first language) and Mathematics, which seems to coincide with the requirements of other deployments like the Nepali deployment. In terms of mathematics, these activites should be as simple as possible, for example, the multiplication/division/adding/subtraction tables done in such a way that the teacher could choose which numbers were to be selected and practiced on any given day and by any given student. It should also, then, be possible to pair up students collaboratively to answer these, and once again, at the end of the session, collect the answers in a score card or report, that could be saved or printed by the teacher.


 


  • Typing tutor or spelling activities

In a similar vein, some kind of activity for practicing spelling should be implemented and monitored in the same way as a maths apps... A general request for all activities was the ability to have an admin view/session that the teacher could use to follow scores, assignment of individual objects of a particular activity and their layout, and the users themselves. This would be something like a monitoring tool.


  •  Simple UI and Simple app rules

It was emphasised that the simplicity of applications is extremely important for younger children, and that many ported apps are just too cluttered to be useful in any way. They were very happy with the simplicty and usability of sugar itself, but were disappointed with many of the apps, which either ignored design conventions or were simply ports of already complex and badly layed out activities.


  •  Collaborative typing tool with speed recognition

Another example of an application they wanted to see was a simple typing activity which would involve the teacher typing an example text, and then the kids trying to type the same phrase as quickly as possible with the times to completion and error/rate being calculated for each child, and then reported to a score card or report followed by saving of this or printing out.


  • Gcompris is a hit, but needs the admin tool

While we focused on presenting gcompris as a great tool for younger children with hundreds of mini apps, it was asked if one could seperate these mini apps into layouts for particular groups of students, or individual students, and again have a central admin part to keep track of what children are working on and even suggest a progression plan (activities to be worked through and scores for those activities to be achieved.) G compris already has an admin part and this should be included within sugar, as it seems to be a vital component to get it to be anything more than a fun experimental game. 



  • The simplest app wins (speak)

The app they found most to their liking due to its simplicity and the fun surrounding it was the speak application. The criticism was that speak should really be having the letters sound like they do in words. For example, 'M' should be pronounced mmmm and not emmm. This would require the fixing of only the sound bytes of single characters.


  • Meshed collaboration extremely shaky, especially with more than 6 users.

There was some skepticism as to how well collaboration would work as we seemed unable to get it to work well due to multiple wireless signals. A server was suggested by us to overcome this and other issues (storing of lesson plans for the activities in moodle, backups to prevent local storage problems, ejabberd for collaboration between xos and non-xos.)


  •  Sugar on a stick, sugar on Ubuntu not Ready

Finally, it was concluded by us after presenting sugar on a stick with the very latest binaries and packages, that, at least on ubuntu, sugar is not ready for even experimental use, as more than 50% of the apps do not work, and networking seems to be broken too.


Present at the deployment were me and Christoph Derndorfer, as well as the education specialists themselves.



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LTSP and collaborated netbooks (not just xos)

We recently held a olpc / LTSP presentation in Vienna, which had the enormous turnout of 11 people. Though the turnout was pretty bad, it did give us the opportunity to be experimental and check the wonderful world of using sugar on various platforms via LTSP.

We hooked up 2 acers, a thin can (artec), a laptop acting as LTSP and ejabberd server, along with 2 traditional xos. Before going into the details of the experiment some explanation is due. LTSP stands for Linux Terminal Server Project, and refers to the use of a mainframe like infrastructure, where minimal systems without hardrives and little cpu and ram can be used as diskless terminals. The idea is that everything runs from the server, with the client netbooting the environment and using the little ram and cpu it has to load the kernel and connect its display session to the server.

Usually older computers (pentium 200hz+ with 64 MB ram) are re-used in this way, though there are various dedicated thin terminals that are mobile phone sized and are highly energy efficient. LTSP terminals usually have no moving parts, making them hard to break. Whereas the XO, and rightly so, has been marketed as the guerrilla
educational device for the 3rd world, it is a little tied in with a specific company and a specific set of hardware. Sugar on the other hand is not, and in my view the more hardware can run sugar natively and flawlessly, the closer we get to a solution that can really feed the masses. As the politics of OLPC grow and change, such as dropping
sugar support, or moving to windows (these are just speculations), Sugar's growth and deployment should not be affected. If anything gives sugar and Sugar Labs a firm grounding its its ability to run on multiple systems and scenarios. I am aware that Sugar Labs is in communication with various vendors and distributors, and it is only a matter of time before some interesting deals are struck.

In our presentation case, for a mobile server, we used a dual core 1.8ghz with 2 gigs of RAM. Setting up the server on the laptop was pretty straight forward, and involved installing LTSP on top of a base Ubuntu system, and then
adding ejabberd as well as Sugar sessions for all newly created users. One can choose other sessions of course, but our interest was to test collaboration on all the machines, in which case Sugar was our environment of choice, and the login session for all our users. Installing ejabberd on the ltsp server was the only requirement for sharing across all machines. I followed the instructions as layed out on the laptop.org wikipedia and nubae.com site. There are still some issues installing ejabberd, such as permissions of the /etc directory, but it has generally become much simpler to install for anyone. Without ejabberd the machines did see each other via xmpp-local, including seeing shared activities, but they tended to fall of the network neighborhood. With ejabberd the machines were visible continuously and were very responsive to connections.

For testing purposes we tried sharing chat across all the machines, which worked flawlessly. The applications in general seemed to load much faster than with the xo hardware, both on the thin can and the acer ones. It was nice to see that a dual core laptop with 2 gigs of ram was more than happy to serve 6 thin terminals at once. This makes
the perfect mobile school, with all the machinery fitting into one backpack!

The laptop server was set up to get wireless internet, and then hand out LTSP through the wired interface, using a gigabit switch as a connector. One of the things that still requires a lot of work, and perhaps this
is due to using Ubuntu, is getting all the activities to work. I tested various activities like puzzle slider and jigsaw puzzle, which just left the activity icon cursor flashing on the screen and eventually fell back to the main screen. Another problem was that turning off or restarting the session was nonreactive. Also many, of the items in the control panel either crashed sugar out completely (date/time) or didn't work. These problems have recently been turned into bug reports, so we hope by the next release of Ubuntu, the environment works as it should.

LTSP and sugar are a great combination and much wished for in schools in the developing and developed world. We will talk a little more about the advantages of LTSP, Sugar and scaling, as well as wireless LTSP and Fat clients in another article.

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