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System & Utilities

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The black planet

System & Utilities

When discussing about which format we should use for vector tiles we had a look to another GSoC project which is being done in OpenStreetMap to create a data tile server.

This project is being developed by Michael Daines and with Darafei Praliaskouski assigned as his mentor. I got in touch with them to ask what the data tile server and its format would look like to see if we could make some first tests with it. They are going to create a JSON tile server with similar tiles as the ones exported from Xappy.js. This JSON tiles, have a schema very similar to the OSM XML tiles, separating data into nodes, ways and relations.


\"version\": 0.6,
\"generator\": \"xappy.js\",
\"xapi\": {
\"planetDate\": 201106161601,
\"copyright\": \"XXX\"
\"elements\": [


\"type\": \"node\",
\"id\": 3596186,
\"lat\": 53.4633699598014,
\"lon\": -2.22667910006381,
\"timestamp\": \"2007-06-21T17:10:58+01:00\",
\"version\": 2,
\"changeset\": 2213,
\"tags\": [ more...

Подробнее | Разместил: Planet KDE | Дата: 07.06.2012 | Прочитано: 732 | Комментарии

An ARMs race, with a core i7 in there too for relativity

System & Utilities

After doing some power benchmarking recently (1.2ghz kirkwood with gb net up = 5watts) I decided to work out how fast these arms can do useful work^TM. In the running is a Synology ds212j, DreamPlug running the Freedombox, Nokia n9 mobile phone, and an Intel 2600k just for working out where those relative numbers sit when compared to a desktop machine.

The above image shows the cipher performance of "openssl speed" across many machines. The 2600k is only single threaded, so could be many times faster in real world use by taking advantage of the cores. One interesting point right off the bat is that the 1.2Ghz kirkwood in the synology NAS is bested by the 1.0ghz CPU of the Nokia n9. Arms is not arms.

Removing the overload from more...

Подробнее | Разместил: Planet KDE | Дата: 07.06.2012 | Прочитано: 634 | Комментарии

Broken Power Supply Unit

System & Utilities

My laptop is now almost four years old and the list of broken components is long:

  • battery
  • microphone
  • CD/DVD drive
  • external VGA
  • Bluetooth
  • display backlight dimming
  • LAN connector (slack joint)

But so far, no grave failure occurred, means, nothing I could not circumvent. Until today. When I woke up, I was not able to power up my laptop.
In short: it was the power supply and it is fixed. But I want to explain how I fixed it because it seems to be a common problem with laptop power supply units. This is not meant to be a tutorial though, only a story of success. :D

The Symptoms

So, the laptop does not power-up. No LED blink, no fan sound, nothing. So I take a closer look at the power supply unit. But what’s that? There is a vague beeping sound coming from it. Not a mechanical one like one can sometimes hear from old television sets but an electronically generated one. I recorded it using a sensitive microphone.

Download: power_adapter_beep.ogg more...

Подробнее | Разместил: Planet KDE | Дата: 07.06.2012 | Прочитано: 649 | Комментарии

Testing KDE 4.9 Beta1 (version 4.8.80)

System & Utilities

As you may know, we recently set up a Quality and Testing team within KDE. We prepared some wiki pages ( and now that the Beta 1 is out, several people already joined this Testing phase.

How can you get involved?
Install the Beta 1 from your distribution, most known distributions provide packages for it.
After that, you can choose two ways of testing:
- either use the release as you would normally and look for regressions, bugs, crashes,... Please report them to (try to search if the bug was already reported, for a quicker result you can ask on IRC, freenode, in #kde-bugs), do not forget to set up the version in your bug report as well as the precise stps to reproduce the bug. If it is a regression, explain how it was before.
- or choose a specific component to test in a more thorough way. We focus in priority on new additions to this release, on changed components and on new features. You can therefore test applets ( more...

Подробнее | Разместил: Planet KDE | Дата: 07.06.2012 | Прочитано: 621 | Комментарии

Last week in Qt development (week 22 2012)

System & Utilities

This post is part of an ongoing series about developments and discussions in Qt.

Some parts of this report are still under discussion, and don’t necessarily reflect the final state of Qt 5. The target audience is people involved in Qt development itself, but without the time to follow everything that happens, and others with a strong interest in Qt, Qt 5, and the community.

This week we cover a rewrite of QVector for code sharing with QString and QByteArray, improvements in the printing system, efforts to make Qt build with some features removed.

QVector implemented with QArrayData interface

QArrayData is a new interface in Qt 5 to represent C++ classes which are sufficiently similar to C arrays, but which have features common to Qt value types such as implicit sharing, shared empty/null objects, raw data access, iterating over the data, and an expectation that the data is laid out in a contiguous block in (virtual) memory, which is relevant to allocating memory for the container. The QArrayData code simplifies maintenance for more...

Подробнее | Разместил: Planet KDE | Дата: 06.06.2012 | Прочитано: 735 | Комментарии

KDE Announces 4.9 Beta1 and Testing Initiative

System & Utilities

KDE has released the first beta for its renewed Workspaces, Applications, and Development Platform.

Подробнее | Разместил: KDE News | Дата: 05.06.2012 | Прочитано: 634 | Комментарии

KDE Connect: becoming an official KDE eV program for organizations

System & Utilities
During the last 3-4 weeks we have been testing if KDE Connect attract attention from different organizations. To do so, we have done the following:
  • Make a presentation during  Akademy-es in Saragossa
  • Talk to different organization representatives and KDE people at LinuxTag about the project to get feedback.
Both experience has been positive so we think we are now prepare for the following step, getting the ok from KDE eV to the Action Plan.

Back in February, I presented the project general design to KDE eV and we agree on keep pushing it,  creating a team and developing an Action Plan. After some work, it is time to discuss it. So within the Board of Directors first and then within the eV, we will discuss the proposal made by KDE Connect team to make sure KDE networking program for organizations is a success.

To reinforce the project, along with Akademy team, we have decided to organize a networking session during Akademy 2012, more...

Подробнее | Разместил: Planet KDE | Дата: 31.05.2012 | Прочитано: 674 | Комментарии

Beta testers – we need you for Amarok 2.6

System & Utilities

We just published Amarok 2.6 beta 1 and need testers:

You can get the tarball from the link on our homepage or ask your friendly distribution packagers to package it for you. Some might already have done that anyway :)

To build from the tarball, you can follow the instructions from our wiki.

Please focus mainly on the new features listed in the article and in the ChangeLog as well as the features you use most, but please also have a look at the (still incomplete) list of tests. Feel free of course to add tests to that list, too.

We would be very glad if you could report the bugs you find right away by using this link: Enter Bug: amarok. Feel free to ping me (Mamarok) in #amarok on if you need more information.

Happy testing! more...

Подробнее | Разместил: Planet KDE | Дата: 31.05.2012 | Прочитано: 517 | Комментарии

Plasma and KDE Applications 4.8.3 Updates

System & Utilities

Packages for the May updates of the KDE Platform, Workspaces and Applications 4.8.3 are available for Kubuntu 12.04 in the official repositories. As long as the precise-updates pocket is enabled (this is the default) you should receive this release as part of your normal system updates.

Many thanks go to Jonathan, Philip and Rohan for working on the packages!

Update: Now available in the standard updates repository. Adding a PPA is no longer necessary.

Подробнее | Разместил: Planet KDE | Дата: 31.05.2012 | Прочитано: 500 | Комментарии

Kdenlive 0.9.2 released

System & Utilities

The 0.9.2 version of Kdenlive has been released, the source package is now available from the KDE servers.
This new release fixes the most important regressions found in the 0.9 version as well as a few other issues.

The crashes in the stop motion widget and composite transition are fixed, slideshows and firewire capture work again. For a full changelog, check our Kdenlive 0.9.2 info page.

All users are encouraged to upgrade and report problems, we will prepare another bugfix release in a few weeks.

Подробнее | Разместил: Planet KDE | Дата: 31.05.2012 | Прочитано: 635 | Комментарии


System & Utilities

This is just a short note mostly for packagers and other developers using LibKGoogle (if there are any). Due to possible violation of Google trademark, the LibKGoogle library has been renamed to LibKGAPI. Thanks to Clifford Hansen for inventing such a nice name Smilie: :)

Also the license has been changed and the project is now under GPLv2+ instead of GPLv3+.

The entire API is now encapsulated in KGAPI namespace instead of KGoogle and headers were moved to %prefix%/include/libkgapi.

All these changes are now reflected in LibKGAPI 0.4.0 release, which does not contain any other improvements or fixes. I decided to go directly to 0.4 instead of continuing the 0.3 series, as I consider this a big and important change.

The Akonadi resources for Google services in kdepim-runtime will depend on LibKGAPI 0.4.0, the patch has been already submitted for review.

The git repository is still called libkgoogle, it will be renamed when it’s moved to KDE extragear (or somewhere else). Stable branch is LibKGAPI/0.4.

Tarball release: libkgapi-0.4.0.tar.bz2 (will be available on more...

Подробнее | Разместил: Planet KDE | Дата: 31.05.2012 | Прочитано: 536 | Комментарии

Calligra 2.5 Alpha Released

System & Utilities

The Calligra team is proud and pleased to announce the alpha release of version 2.5 of the Calligra Suite. Since the first release of Calligra the team has worked using a new development model where new features are only introduced into the main sources (known as “master”) after a feature or bugfix is “finished” in some sense. The actual development is done in a branch which is kept separate from the main sources while the code is still immature.

This allows us to use shorter development cycles and shorter alpha and beta periods since the master branch should in principle be releasable at any time. However, all software contains bugs and in 3 weeks we will announce the 2.5beta version. This also marks the hard feature freeze for version 2.5. After this there will only be bugfixes on the release branch until the final release in July.

Подробнее | Разместил: Planet KDE | Дата: 31.05.2012 | Прочитано: 663 | Комментарии

Calligra 2.4.2 Released

System & Utilities

The Calligra team has released version 2.4.2, the second bugfix release of the Calligra Suite, Calligra Mobile and Calligra Active. This release contains a number of important bug fixes to 2.4.1 and we recommend everybody to update as soon as possible.

Bugfixes in This Release

Here is an overview of the most important fixes are in 2.4.2. There are several others that are not mentioned here:


  • Speed improvement on layouting large documents (BUG: 298216)
  • Fix image effects ‘grayscale’ and ‘mono’ (BUG: 260434)
  • Fix saving of patterns
  • Fix painting artefacts after snapping has been used (BUG: 260418)
  • Fix adding word to dictionary (BUG: 298794)
  • Fix crashes when using the color set popup (BUG:298412)
  • Fix compilation with CLANG compiler


  • Use masterpage background correctly (BUG: 299639)


  • Fix crashes when saving query design


  • Do not fill layers that cannot be edited (BUG: 300082)
  • Fix loading of layer name from Gimp files having bad encoding (BUG: 298994) more...

Подробнее | Разместил: Planet KDE | Дата: 30.05.2012 | Прочитано: 629 | Комментарии


System & Utilities

GNOME 3 is a perfect example, but it is not the only one. I could cite many examples from the K Desktop Environment too.

Подробнее | Разместил: KDE News | Дата: 30.05.2012 | Прочитано: 496 | Комментарии

open-slx Weekly News 19 published

System & Utilities

We are pleased to announce the new  open-slx Weekly News 19 in the Formats PDF and EPUB.

You can find in this week (abstract):

  • Updates from the Newsteam
  • Maliit & Plasma Active
  • New Font-Repository available
  • Linux Colormanagement Hackfest
  • and more...

The open-slx Weekly News 18 are downloadable there [275,50 kB] (PDF) and there [19,10 kB] (EPUB).

Because Textwriters are needing Coffe just  donate anything.

Original Post:

Technorati Tags:Technology, News, Mobile App, Tablet, Tablets

Download: PDF-Format [275,50 kB] EPUB-Format [19,10 kB]

Flattr this

CCL more...

Подробнее | Разместил: Planet KDE | Дата: 24.05.2012 | Прочитано: 953 | Комментарии

The Magic Continues

System & Utilities

Hot on the heals of the awesome PulseAudio 2.0 release, I am very please to announce Mageia 2! It's been a lot of very hard work and I inadvertently ended up doing a lot more than I had originally intended but I can't complain - while it was a lot of hard work and a massive time sink for the last few months, I certainly learned a great deal and feel I've contributed to a great user experience.So what makes Mageia magic? Well I like to think it's because we've got a great bunch of people involved - not only that, we have clear guidelines about how the whole project can never be owned by a corporate interest - it's a true community distro. If this is important to you, (and it should be!) then I encourage you to get involved and help us make it even more magic.

Not only that, but while we're a young distro we come with a rich history: Mandriva. While the corporate side of Mandriva is still somewhat more...

Подробнее | Разместил: Planet KDE | Дата: 24.05.2012 | Прочитано: 925 | Комментарии

Last week in Qt development (week 20 2012)

System & Utilities

This post is part of an ongoing series about developments and discussions in Qt.

Some parts of this report are still under discussion, and don’t necessarily reflect the final state of Qt 5. The target audience is people involved in Qt development itself, but without the time to follow everything that happens, and others with a strong interest in Qt, Qt 5, and the community.

This week we cover the move of QIcon and consequences that can have, continued work on Qt using UTF-8 by default, more discussions about QPA, and touch events.

QIcon returned to QtGui

With the splitting of the Widgets related classes from QtGui in Qt 5, QIcon had ended up in the widgets module. When a commit arrived which added a new class for multiple-size icons, the rationale was discussed, and the class has now been returned to QtGui. This could conceivably have favorable consequences for using icons in QML 2 code in the future, and possibly a QPA API for loading icons from standard platform-defined more...

Подробнее | Разместил: Planet KDE | Дата: 23.05.2012 | Прочитано: 1055 | Комментарии

Qt 4.8.2

System & Utilities

Qt is a comprehensive, object-oriented development framework that enables development of high-performance, cross-platform rich-client and server-side applications.

Подробнее | Разместил: KDE News | Дата: 22.05.2012 | Прочитано: 819 | Комментарии


System & Utilities

re:publica #rp12

About two weeks ago I went to Re:Publica, a hipster event (can I say that?) in Berlin. It was an interesting event - related to the stuff I usually visit, yet different. I'll go over the differences, then present what I see as the challenge for Free Software events: get those creative, digital and always-online people closer to us!


The main audience of the event could probably be best described as people interested in the 'digital lifestyle'. People who use smartphones, are always on-line. They find their places-to-go on foursquare, talk to their friends on facebook, share their opinions on twitter, Whatsapp with their love - but they don't hang out on IRC or visit forums very often and they probably have a Macbook Air and a high-end android phone. Yes, not that different from us.


The event featured talks on things like the web, new cloud services like on-line more...

Подробнее | Разместил: Planet KDE | Дата: 17.05.2012 | Прочитано: 875 | Комментарии

KDE Telepathy has a shiny new forum!

System & Utilities

As distributions are slowly adopting our instant messaging suite, we get more and more questions from people everyday. And to give a proper support, we need a proper place to do so. So we decided to meet our users half-way and we created a special KDE Telepathy section at - you can find it here, in the Internet & Network section. We're watching that forum and will try to help you, our users, as best as we can. So if you have any questions or want to discuss something, jump over there and ask away.

Big thanks to einar77 and the rest of our KDE sysadmin team for making this happen, as always - you guys rock!

Подробнее | Разместил: Planet KDE | Дата: 17.05.2012 | Прочитано: 973 | Комментарии

and, nor or

System & Utilities

Just read another "forget desktop Linux" piece by a writer trying to cover Free software on a sight ostensibly doing the same. This is exactly the sort of thing I wrote about in a recent blog entry, and it's sad to see it continue.

First off, "world domination" is not the only metric, nor the most useful one in every case. We have tens of millions of users around the world and I'm sure they'd appreciate it if we didn't forget them. I am one of them, and I know I certainly feel that way. You may be as well.

There's another aspect to that article: it suggests concentrating on mobile. Now .. where have I heard that before? Oh, right: everyone saying the desktop is dead, long live the web, we should focus all our efforts there.

Wake up call #1: hundreds of millions of laptop and desktop systems are sold each year. It's a market that isn't going away. Nothing is "killing" it. It is being displaced to some more...

Подробнее | Разместил: Planet KDE | Дата: 17.05.2012 | Прочитано: 939 | Комментарии

MPRIS2 and the Music Player Daemon

System & Utilities

If you tend to want to keep your music running when you log out, or control your music playing on a desktop machine from a laptop, for example, you may well use the Music Player Daemon (MPD).  If you use Ubuntu’s Unity desktop or KDE’s Plasma desktop, you may well wonder how to get the Ubuntu sound menu or Plasma’s Now Playing widget to talk to it.

Both of these use MPRIS2 to communicate with media players.  MPD, however, does not have an MPRIS2 interface.  Even if it did, it would take a bit of work to be able to use it from another computer.  What you need, then, is a “bridge” of some sort to translate.  One such possibility is mpDris2 (which, I hasten to point out, I haven’t tested).

You would run such a bridge on the computer you want to control MPD from, and point it to your MPD instance.  And voilà!  Every MPRIS2 client application that you run can more...

Подробнее | Разместил: Planet KDE | Дата: 17.05.2012 | Прочитано: 914 | Комментарии

openSUSE at LinuxTag Berlin 2012, SUSE Hiring!

System & Utilities


It's almost that time: in one week LinuxTag opens its doors! Courtesy of your friends at Fedora and openSUSE, there will be 'Beefy Miracle' hotdogs and 'Old Toad' beer. And together with the numerous other projects we bring you talks about Linux and new Free/Open Source technologies, interesting people to talk to and lots of fun and party!

Cool stuff in the booth area, BEER AND HOTDOGS!

This year, openSUSE & Fedora gang up to both support you, the visitors, and LinuxTag, our gracious hosts. We'll hand out 'Old Toad' beer and 'Beefy Miracle' hotdogs for a small donation (€1 per item) to the LinuxTag e.V.! So there you have it:

Come, buy and eat hotdogs and drink beer in support of LinuxTag!

(the openSUSE beer is actually free as the catering didn't like us asking for donations to LinuxTag. However, we strongly suggest to give a donation anyway) more...

Подробнее | Разместил: Planet KDE | Дата: 17.05.2012 | Прочитано: 1014 | Комментарии

Maintainer wanted: port the “scheck” style to Qt4/KDE4

System & Utilities

In KDE3 times the “scheck” style from kdesdk/scheck could be used by developers and testers to “highlight accel and style guide conflicts”, like this (from the README):

  • Orange shows accel conflicts.
  • Green proposed accels.
  • Dotted red lines show nested groupboxes (not prohibited, but not favored :-) ).
  • Potential style guide violations are marked with yellow, likely ones with red.
  • Missing colons are drawn with two small red squares.
  • Errors in window titles are marked with “foo|b|ar”.
  • Violet background show untranslated string.

Just, the scheck style has never been completely ported to Qt4/KDE4! Since the begin of the KDE4 era it has stayed in kdesdk but excluded from any build. And now in the preparation of the migration of kdesdk module to git-based repositories any unported submodules will be moved to tags/unmaintained/4, already next sunday, May 20th.

So take a look at the current sources and consider giving it some Qt4/KDE4 love :)

If you are interested, please subscribe to the new more...

Подробнее | Разместил: Planet KDE | Дата: 17.05.2012 | Прочитано: 884 | Комментарии

Musings on the linux audio stack

System & Utilities

I spent some free time today getting caught up on the large backlog of phonon-gstreamer bugs. Towards the end, I started to have delusions of grandeur: Imagine a phonon-gstreamer codebase that doesn’t require supporting a zillion different audio frameworks, and instead belays that task to something that I don’t have to maintain.

My question here, is how many people would throw a fit if phonon-gstreamer dropped support for ALSA and OSS, and forced everyone to use pulseaudio by way of GStreamer’s excellent pulseaudio support?

Hold on, lower your pitchforks for a minute. Let us consider the audio framework landscape in the modern world:

  • Pulseaudio is the One True Way for audio playback in Gnome
  • For 90% of the support questions we handle in #kde-multimedia, the solution is “use pulseaudio”.
  • Pulseaudio can handle using OSS, ALSA, Bluetooth, or whatever your audio output is, through one consistent entry point
  • It is a total headache to figure out any bugs in your audio when music goes from Amarok->Phonon->Phonon-GStreamer->(ALSA, OSS, Pulseaudio, god knows what)->Speakers->Earholes

Additionally, I really don’t feel like testing phonon-gstreamer more...

Подробнее | Разместил: Planet KDE | Дата: 17.05.2012 | Прочитано: 945 | Комментарии

Linux Color Management Hackfest idea

System & Utilities

Sirko brought up the idea to organise a hackfest together with developers of applications for Linux desktops and experts interested in colour management. The idea behind that event was to bring interested developers together, support them in implementing color management in their software and move forward that topic across desktops and distributions.

During the recent LGM we found a chance to involve Richard Hughes and planed together about what we like to do during the hackfest. We spotted three main areas of interest: desktop applications including window managers, web browsers and printing. These topics are already worked on, but in a scattered way.

As example, Gwenview is a really great application for managing pictures. But it has no color management implemented yet. Color management in KWin is worked on during the GSoC this year, but in the opposite color management in the compositing manager mutter on the GNOME side is far away as can be read here. Not many web browsers support color management and more...

Подробнее | Разместил: Planet KDE | Дата: 17.05.2012 | Прочитано: 932 | Комментарии

Zeitgeist improvements with genetic algorithms

System & Utilities

Continuing with my previous post about the Zeitgeist team’s improvements with regards to speed, there’s a nifty tool in the sources I wrote yesterday that uses a genetic algorithm to find the slowest queries you can throw at the engine.

If you’re not familiar with genetic algorithms, here’s a brief review of how they work:

  • Start off with an array of numbers, with each index corresponding to a particular attribute of the problem.
  • Evaluate the fitness of that genome
  • Simulate evolution of the successful genomes by crossing, mutations, etc, just as you would with real DNA chromosomes

In the case of this Zeitgeist tool, the chromosome refers to a query, and each allele (index of the array) refers to an attribute of the query. Here’s a relevant comment from the sources:

# Chromosome to data mapping:
# 0, 1 - Timerange begin and end. If both are zero, we use timerange.always()
# 2 - The search type. Anything over 30 is a dead individual.
# 3-5 - Specify template properties. Anything besides 0 and more...

Подробнее | Разместил: Planet KDE | Дата: 16.05.2012 | Прочитано: 892 | Комментарии

J7Z 1.2.0

System & Utilities

J7Z is an alternative 7-Zip GUI. 7-Zip is a high-compression file archiver designed by Igor Pavlov.

Подробнее | Разместил: KDE News | Дата: 15.05.2012 | Прочитано: 856 | Комментарии

Open source suites go beyond Microsoft Office

System & Utilities

In my blog post last week, as well as showing a cool video of Ubuntu for Android in action , I asserted that open source makes the perfect foundation for innovation.

Подробнее | Разместил: KDE News | Дата: 11.05.2012 | Прочитано: 1024 | Комментарии

The quest towards trusted client applications: a rambling

System & Utilities

Some of you are surely aware of my work with PolicyKit and my efforts on making privilege escalation in KDE/Linux easy and accessible. The final result of my efforts was KAuth, now part of kdelibs. Although, since quite a lot of time I have been wondering on how to improve the whole escalation/trust experience, also covering a part of our middleware which is still not quite there.

One of the main issues in a Linux system at the moment is that we are not capable of identifying and ensuring that a client application *is* actually the application we are expecting. Anyone can fake a DBus service on the session bus, same goes for the process name and much more. This is also one of the big pitfalls of Polkit – as much as the authorization is guaranteed to be unique for each client, there is no way to determine if a specific client is *actually* supposed to execute a specific action or not.

These days I am at UDS, and I have been talking about the subject with Alex (Fiestas) more...

Подробнее | Разместил: Planet KDE | Дата: 11.05.2012 | Прочитано: 1002 | Комментарии
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