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 If you're tracking KDE 4.3 development and using packages from the last week or two, you may be experiencing Plasma crashing where the backtrace contains "Solid::Predicate::~Predicate()".
The cause of this is a small bug in some string parsing code in Solid that was tripped up by hotplug action .desktop files installed with some packages of Kaffeine. The kaffeine_play_videocd.desktop file, found in `kde4-config --prefix`/share/apps/solid/actions/, apparently ended up getting shipped with mismatched []s in it. (I'm not sure how that happened exactly as the files look proper in Kaffeine's svn? Oh well ..)
I fixed the crash in Solid the other day but a lot of people seem to be running into it while the fix percolates out. The solution is to get a version of kdelibs (or even just Solid) from this week and/or fix the incorrect .desktop files (e.g. by adding the missing [s).
It's cool that so many people are using and testing the latest and greatest 4.3, though. Figured I'd blog the answer so people can find it more easily.
Enjoy. |
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| Recently I began using QtCreator to try and do some development on Amarok. During my day job as a Java developer I get to work with tools like Intellij, which is a great IDE when you can put aside the problems of Java GUI apps on Linux. For a long time I’ve been using vim for my KDE development which has been more than sufficient, but lately I’m craving some of that productivity win that a fully fledged IDE can give. Today I’ll show you how you can set up your KDE application in Qt Creator and use it’s interactive debugging to enhance your development speed. I’ll assume that you have an existing KDE project and you’re using Qt Creator 1.1, and I’m not going to do any whining about bugs and that rubbish. Firstly, you’ll need to open a project. It’s as easy as File > Open and then find your CMakeLists.txt file. Your project should be parsed and opened. While we’re at it, let’s make sure that our compilation is optimised to ...read more...
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FINALLY committed the stuff to SVN under /22x22/actions/ and also the source svgz's. The intire set is named kmix-***** maybe the naming need to be reworked into mixing-****. any way the kmix developer can now point to the new icons.
Lately I have been thinking on selling stuff KDE/theming oriented, like for example themed folders icons in star trek style, plasma themes that are in a Dune like atmosfere etc... Do you think its a good idea and if so would you like to read about it on my blog post's.
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| One of the new features proposed for GCC 4.5 is the ability to use plugins. I'm a big fan of plugin architectures, especially in open source software. I think that plugins provide a really nice starting point for potential developers. So you can start with something simple and well defined, and grow into the rest of the system. Personally, the idea of understanding all of GCC is just overwhelming. But perhaps I could do a really basic plugin that can do an additional static check. The idea is based on mygcc which allows extensible checkers to be written for gcc. As an example, consider a (C) API that looks something like
foo_init();
foo_use1();
foo_use2();
foo_cleanup();
where you have to init() before using any of the use() functions, and then cleanup() when you're done. Its an error / bug if you forget to init(), or cleanup(), or if there is any path that results in the sequence being broken. Its an error if you cleanup() twice. An example of this is something like malloc/free or ...read more...
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Once I got frustrated with the “zypper dup” trying to downgrade kde4 packages due to my weird mix of package installs from various repos, I decided to go for running KDE from svn trunk. KDE from svn really flies on my laptop and I don’t find the need to login to vista of late. However KDE svn had a strange problem. Unlock dialog wouldn’t let me unlock complaining of authentication failure. This confused me as I was using appropriate password. With some investigation, I noticed kscreenlocker to be the process behind locking and killing that in another terminal would unlock me  The beauty of open source helped me continue to futher investigate the issue and I discovered “kcheckpass” being used by kscreenlocker. While /opt/kde3/bin/kscreenlocker would authenticate me, the kde4 version failed!! Solution: The README file in kcheckpass source folder gave me a hint regarding ownership and setuid persmissions for kcheckpass to be set. kcheckpass requires owner to be root and needs the setuid bit to be set. Finally after invoking “sudo chown root ...read more...
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| Am I the only one to wish that there existed another aggregation of kde-related blogs, like planetKDE, but with much stricter rules on what is OK to post? Like, only allowing to write on software one has been coding, presenting achievements and plans, and trying to attract more contributors? Looking back on how I have first been reading planetkde as a KDE enthusiast, and then been using planetkde for Eigen, this is what I've always been looking for.
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| Last week in between running usability testing on Amarok and preparing for the Season of Usability I wrote some notes down about the KPackageKit updater. Very informal, but I figured if I posted them, maybe the right people would see them and find something useful. Expert Review of KPackageKit Updater (PDF 922KB), April 20 2009 (Now that the SoU student applications have been opened, I can get back to the Amarok usability test report :)
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| Are you a student of design, usability, human factors, or other HCI-related field? Are you interested in working on an open source project? For 10-15 hours a week between June 1 and August 31, you could work with an experiences usability mentor on a fun and interesting design project! An added bonus is the $1000 USD internship stipend at the end of the project. The OpenUsability Season of Usability is a series of sponsored student projects to encourage students of usability, user-interface design, and interaction design to get involved with Free/Libre/Open-Source Software (FLOSS) projects. Inspired by Google’s Summer of Code™, OpenUsability offers sponsored student projects. Other than the Google projects that address developers, they aim at students of usability, user-interface design, and interaction design. Students experience the interdisciplinary and collaborative development of user interface solutions in international software projects while getting into OSS development. This year we are happy to support student opportunities from these open source projects: - Amarok
- Drupal
- Gallery
- GeneMANIA
- GNOME
- Kadu
- KOrganizer
- OLM
- SemNotes
- Ubuntu
See the Projects page for more information ...read more...
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| Finally moving lekhonee to PyKDE4. Main reason is to add spellcheck support, which looks very easy in KDE land than Qt.
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| Konqueror and KHTML continue to be a bit of a contentious issue. My last post received quite a treatment. There was a lot of good feedback and I appreciate the thoughtful comments people made. There were some really good thoughts and there are a few things I want to cover that I previously didn't. So first things first: Goals Having clear goals and values is important, especially for a project as large as KDE. They provide guidelines for appropriate functionality and development and having good goals is an important part of good software. I build on a couple of values which lead to my thinking and reasoning in this. This all starts with a simple question: How does KDE improve a person's life? And to extend that a bit further: Why should someone choose KDE over something else? KDE is valuable because it's being built to be comfortable. Ease of use, customization and other features as well seem to be focused on this (somewhat amorphous) goal. I think that konqueror needs to fit into this picture as ...read more...
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| The Akademy program is almost done. Speaker notification deadline was yesterday, but we are still busy sorting out some last details and haven't sent notifications yet. Please bear with us and have a bit more patience. We have a lot of great proposals, more than we can fit into the schedule. So it's not easy to decide what we can take, and the co-hosting with GUADEC adds another dimension of complexity to this task. But we are on a good track, and we will have a fantastic program. Stay tuned...
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| UserBase , the KDE user wiki, is really growing nicely but certain areas are still lacking quality content.
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  Since few weeks, an active work have been done with Julien Pontabry and Julien Nardoux to solve this bug report. read more
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| So I have again the pleasure of being selected for Google's Summer of Code for Amarok to scratch some very serious itches concerning media device support in Amarok 2. Itches: - Playlist Support
- More GUI Feedback, more intuitive interface
- UMS(Universal Mass Storage) Support
Playlist: Actually, iPods in Amarok already have their playlists read on connect, but at the time I wrote the code, the code in Amarok for any collection dealing with playlists wasn't at a satisfactory level yet, which I believe it to be now thanks to the work of a few people, in particular I know that Stecchino (Bart) has worked on it. GUI: The media devices applet seemed like a good idea at first, but it's terrible from a usability standpoint, and since the PUD (Popup Dropper) removes any possibility of dragging-and-dropping tracks onto it, for instance, it doesn't make much sense to have it. However, I understand there's plans in the works to redo some of Amarok's GUI, part of which will accomodate the previous functions of this applet, and I'll be taking advantage of that. UMS Support: Yes! I swear it this time. It turned out ...read more...
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Ok I must admit I'm getting tired of this icons :D, but I tried to make them better than last iteration and less confusing... the first one is the "pc-speaker", I have no better idea than this, and honestly I think its pretty good :P, secondly I made the "mic boost" using a red emblem with an arrow up, and finaly made the "record" channel's like a record button with a printed mic emblem....
Hope you guys like it!
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| Hearing that kubuntu jaunty was out, I upgraded two machines today.
My wife's machine, so she can finally use KDE 4.2, and my own desktop machine. On her machine, NVidia card, no problem at all.
On my machine, ATI Radeon X1300, after the upgrade, X would always just show some red dots on the top of the screen, and then the machine would hang (no keyboard, no ssh, nothing except reboot).
I tried every possible driver in xorg.conf, no difference. So this isn't a driver problem, but an Xorg problem.
Other people on #kubuntu (e.g. "chx") reported the same issue. So... I recompiled the xorg packages from intrepid (i.e. X.org 1.5.2) so that they can be used on jaunty. Long and painful, but it solved the problem. Proof that the problem is really X.org 1.6.0. In case anyone is interested: http://www.davidfaure.fr/2009/xorg_debs.tar.bz2 Quick instructions: download, unpack, then
sudo dpkg -r xserver-xorg-video-all xserver-xorg-input-all
sudo dpkg -i *.deb. If you see apt-get -f install removing a bunch of video drivers, that's fine; I didn't recompile them all, ...read more...
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| Sometimes little details gives a way greater feeling of power and customizability, without actually adding much and more importnant without adding tons of new buttons and configuration options. Plasma panel can arrange widgets in an ordered linear layout, one after another, but what about if you have a panel where you want to distinguish between different groups of applets and want to put a space between them to make the look more clear? Since a couple of days in the plasma configuration dialog a new single button appeared: "Add spacer":  Clicking on it it adds that little widget at the end of the panel, it's just a space and you can drag it around as with every other widget or resize it as you wish by dragging the borders of it (that in this screenshot are a little darker) just like any window or resizable stuff in general.  Of course a space is not something that you should see: it's empty right? So you close the panel edit mode and ...read more...
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Facing the end of the second month on my new job, things move slow but forward, as always happens with new projects.
I've been working hard to open communication channels between companies. Interaction is more usual at a technical level than at a manegement level in every free soft. company and we are no exception. We know how to interact in a lower level. We've learned it by collaborating in free software communities, but at higher levels....that's another story.
The good point is that most of the managers and owners of ASOLIF companies come from the technical world. In fact, most of them begun as free software developers. They want to interact as managers as they did as technicians.
So how can we achieve this goal when not all of the information a company handles can be public, can be shared? How does cooperation is possible when you compete everyday?
Big companies can organice themselves in departments with different procedures, so they can interact with different profiles at different levels. Small companies cannot. For ...read more...
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Hello planet KDE! This is my first post on planet kde, so I’ll first introduce myself. My name is George Kiagiadakis (gkiagia on irc) and I am a 20-year-old student from Greece. I was born and live in Iraklio, on the island of Crete and I study computer science at the Computer Science Department of the University of Crete. Some of you may already know me as I have been involved in KDE for a few months now. I first started my involvement from the KDE Bugsquad, doing bug triaging, and then I started fixing some bugs as well. I got an svn account in October and I first fixed some issues with kwrited (a daemon that sits in the background and listens for messages sent with write(1) or wall(1) on the same computer). During the period of the KDE 4.2 pre-releases, I also joined the Debian Qt/KDE Maintainers to help them with packaging, which I still do. Later, I started helping Dar
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Some one asked me to show all of the kmix icons together, and if some one asks I obey :), any way I think it only makes sense, so here its goes the almost complete icon theme from KMix in oxygen style. Currently I think its only missing, default PCM, pc speaker, and surround center.  So in order we have, master, front, surround, LFE, PCM, front mic, front mic boost, line, cd, mic, mic boost, headphone, digital line, record master, and finaly record secundary. |
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|  Fresh from the oven: Qt 4.5.1, Qt Creator 1.1, new SDK.
Details on what has changed can be examined in the changes file. Now that the release is out, the QtWebKit team is busy again fixing bugs and backporting important fixes for the next patch release (4.5.2). Expect to see more extensive changes there. Few QtWebkit-related examples which I have written are also being cleaned-up and imported as new Qt examples, as we speak.
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The Kubuntu Team is proud to announce the release of Kubuntu 9.04, the Jaunty Jackalope!
With this release, the development team brings you the best KDE distro out there. With its world-renowned Ubuntu core and the KDE 4.2 desktop, Kubuntu 9.04 gives users a well-rounded, feature-filled and elegant desktop. On the top, KDE 4.2 brings beauty, innovation and updated software with new & improved features. Underneath, updated kernel and core systems bring stability and speed.
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Following a quite heated discussion on #kde-devel about minimum versions of libraries required to build KDE trunk, I decided to describe how I install up-to-date libraries without messing with my distribution packages. Installing a library by hand can usually be done in three places: - Install in
/usr: this is a sure way to annoy the packaging system of your distribution… - Install in
/usr/local: this is the traditional way to install libraries by hand, but it is a bit difficult to uninstall things because files are scattered in the traditional lib, share, bin… folders. - Install in
/opt/library_name: this makes libraries easy to install and uninstall, but it needs a bit more work to make the library available to the rest of the system. I personally like to use option #3. Installing a library this way requires specifying the prefix at configuration time. For libraries using autotools, this is done with ./configure --prefix=/opt/library_name. For libraries using CMake, use cmake -DCMAKE_INSTALL_PREFIX=/opt/library_name. As I said, when you are done, you need to make the library available to the system. To ...read more...
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| Canonical has announced the final release of Ubuntu 9.04 ; also announced were the releases of Ubuntu 9.04 Server Edition and Ubuntu 9.04 Netbook Remix, but of course also Kubuntu 9.04 , and Xubuntu 9.04 . This new Ubuntu release delivers a host of new features, as well as lots of improvements.
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| As part of Qt 4.5, we added QGraphicsItem::opacity. Which is great! But it doesn’t work as well as it could. We’re receiving a few comments about how this implementation could work better. Trouble is, in Qt 4.5 we only have two ways of rendering: direct, and indirect (”cached”, e.g., ItemCoordinateCache). And in order to apply opacity, you really need full composition support… :-/ Here’s a rundown of the trouble with today’s opacity support: - The current behavior modifies the input opacity of the painter
- …so you can override this opacity on a per-item basis (intentionally or not!)
- …and each primitive (line, rect, pixmap) you draw with QPainter will be composed one at a time inside the item (which is bad!)
- The behavior is slightly different depending on whether you cache an item or not.
- …if you use caching, the offscreen pixmap is rendered with an opacity, whereas the item itself doesn’t have any opacity set on its painter.
- Each item applies opacity locally, and even though opacity propagates to ...read more...
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I’ve been accepted as a Google Summer of Code student too for KDE! Third time lucky. Of the two propossals I sent, the one about getting a brand new bookmarks system for konqueror is the one which got accepted. That’s great, because current Konqueror bookmarks was showing its age. Most of the main browsers today have a more advanced bookmarking system. Currently it’s easier for a user to search his bookmarks with krunner than doing so with Konqueror itself. This will be no more. The bookmarks will now be stored with Nepomuk and Akonadi and will be easily found using an awesome location bar similar to firefox’ one, using krunner, the bookmarks editor or the bookmarks menu itself. As Chani (who has also been accepted as a GSoC student this year) has suggested, I’ll do a GSoC weekly report of my project, so be tunned konqueror users! Now that we are in the community bonding period, I’ve started the project by fixing some konqueror bugs that I should have fixed long time ago, and will continue by testing ...read more...
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| After much hard work from Qt Software developers in Oslo, Berlin and Brisbane, Qt 4.5.1 is now available. Qt 4.5.1 is a patch level release providing a large number of bug fixes and minor improvements over the 4.5.0 release that went out in early March. You can get Qt 4.5.1 here and you can see what’s changed in the changes log. Many thanks are due to those users who provided feedback on the 4.5.0 release. Your feedback has been very valuable in helping us to improve Qt, and we hope that you will continue to send us your constructive criticism, wishlists, likes and dislikes for the 4.5.1 release and beyond.
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| Like I promissed you, the step-by-step of the GSoC project will be all described in this blog. So, for now… As I said in my proposal, the first task of this project, besides studying libs and stuff, would be the appliance of the focus group technique, right?! Ok. But, first, what is this focus group about? Well, it’s something like a meeting with 8 - 12 people with opinions (very important - they gotta have opinions) about certain matter. There is also moderator that is going to lead this 1-2 hour discussion, and he will make sure that all the points and questions to the matter were covered. Here is wikipedia to help you: http://en.wikipedia.org/wiki/Focus_group In this project, the moderator would be me and the matter would be the Widgets Explorer, of course. But how to get it done? Well, the traditional technique says it must be a traditional meeting, with people in the same room. But since this matter involves a international community - and so it would be hard to get together at the same room - how ...read more...
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