Developer Conference 2012 - best talks announcement

Fri, 02 Mar 2012 14:06:33 GMT

Hi everyone, as I mentioned in one of the previous blog posts, there was a competition for the best talks of Developer Conference 2012. And here are the winners! The absolute rock star is Bryn Reeves, both of his talks scored very high.

#1
Bryn Reeves - How To Lose Data and Implicate People
#2
Karel Piwko - Arquillian Drone Helping Ike Get Rid of the Bugs
#3
Geoffrey De Smet - What Are Drools, Guvnor and Planner?
#4
Lukas Czerner - Btrfs: Design, Implementation and the Current
#5
Bryn Reeves - Supporting the Open Source Enterprise
Miloslav Trmac - Concise Overview of Security

Thanks guys for putting a lot of effort in your talks, I hope to see you all next year!

Developer Conference 2012 - slides

Mon, 27 Feb 2012 22:22:08 GMT

I've just updated the conference page at www.devconf.cz with slides. Check it out if you've missed some talk. I've started processing the videos last week but it's damn slow. Hopefully I'll have first few done within couple days.

Developer Conference 2012 - pubs

Mon, 13 Feb 2012 16:30:30 GMT

Talks, labs, events .. well, but one things was still missing for the Developer Conference 2012 - the list of all pubs near the conference place. Big thanks to Juraj Huska! Enjoy the event and the after-parties!

Developer Conference 2012 - labs

Tue, 31 Jan 2012 20:35:29 GMT

The last thing that I haven’t described yet are the hands on labs. Labs were always focused on practical experience with presented technologies. Participants should bring their laptops or rely on free computer in the lab room and try out stuff either in virtual machine or directly on their fresh Fedora. We will have live USB sticks with Fedora for those who will come with different OS on their laptops. The first lab room will be used for GTK+ Hackfest. There are several topics to hack on, including accessibility, clutter, better support for touch screens etc. The second lab will have a series of session called “The framework wars”. The usual pub fight/discussion between developer ended up in three session showing on few simple examples how to use Ruby on Rails, Sinatra and Django. The last workshop on Friday will be focused in SELinux, creating your customer SELinux modules and how to deal with AVC denials.

On Saturday lab #1 belongs to JBoss guys and Java in general. If you want to start developing Java EE application, want to learn how to install a Java server, deploy your code, start and debug your application, than the morning session is ideal for you. Afternoon continues with Portlet Bridge workshop targeted on integrate it within a JBoss Portal. Pavel Tisnovsky, our OpenJDK guru, will guide you thru Eclipse IDE. If you are missing fancy IDE on Linux, want to learn how to use views in Eclipse, debug your application, integrate eclipse with your favourite version control system. Afternoon in lab #2 opens with Stanislav Ochotnicky - the Java SIG guy who also created and maintains the fedora-review tool and who will guide you thru Fedora Package Review by using this tool. And last but not least, Dan Horak is active in various secondary architecture communities, including ARM, Power or s390. Dan will show you some of his toys, how to deploy Fedora on special architectures, what bootstraping means and how to fix architecture specific problems.

As I’ve already mentioned, lab #3 will be used as an open meeting room for random meetings, presentation follow-ups and ad-hoc sessions. Looking forward to see you there.

Developer Conference - what will you learn on day#2

Wed, 18 Jan 2012 22:17:25 GMT

The second day of the Developer Conference will be as packed as the first one. Hopefully the party on Friday night won’t make any harm on the attendance of first sessions. The opening session in track#1 are managed by our tools guys - Marek Poláček, Jan Kratochvíl and Jakub Jelínek will in two slots guide you thru prelink, elf, news in gdb and gcc. Next two session in track#1 start the desktop track. Matthias Clasen and Jonathan Blandford are both developers directly involved in Gnome development. Matthias will start with GTK+ 3 and it’s future, Jonathan will continue with planned features for next Gnome 3.x release and integration of Spice within the desktop.

The track#2 will be open by Jared Smith, Fedora Project Leader. His talk will stress the importance of upstream development and how Fedora has a key role in this ecosystem. Talk is focused on all Fedora maintainers and developers. The rest of the day in track#2 belongs to kernel developers. First on the stage is Lukas Czerner, talking about btrfs. Lukas promised to give a little background on why do we need yet another filesystem. Lukas works mostly on ext4 and will compare btrfs not only with ext4/lvm but also other filesystems. Next on the stage is Jaroslav “perex” Kysela. Some time ago (IIRC it was in 1998) Jaroslav started the ALSA project. His talk will be about HDA - High Definitiona Audio and progress on the kernel driver. Next talk is still open, we have confirmation from the oVirt folks that they will show up and give a talk their virtualization management app, but details are still missing.

Afternoon in track#1 continues with desktop sessions. Hand De Geode is Spice developer, his recent project integrates usb redirection support into Spice. If you haven’t seen Spice in action yet, Hans will hopefully give some nice demos. Tomeu Vizoso is one more GTK developer talking at the conference. His talk will be about application development with Python and GObject Introspection. On the other hand, Shaun McCane, works in the documentation team keeping the GNOME docs updated and live. He will talk about GNOME Help System. The day will continue with Jaroslav Reznik and little bit from others desktops as well, in this case from KDE. Jaroslav works in KDE upstream, is active Fedora Board member and maintains KDE in Fedora. He will introduce Qt5 project and what are the new and planned enhancements in this toolkit. After this talk Jared Smith continues with his second talk, this time about docbook and publican and how to generate documentation into various formats starting from web pages to manual pages. Last talk in track#1 is open for speakers from university. Fedora and Red Hat has couple projects running together with folks at university and some of this projects will be described during the last session of the day.

Track #2 continues with the kernel session. Bryn Reeves will start with his second talk, again inspired by his supporting job. This time about LVM, raid and how to backup, snapshot and restore the data. We will continue with LVM talk from Tom Coughlan. Tom runs the Storage group at Red Hat and will uncover the enterprise strategy for storage. His colleagues Milan Broz, Joe and Zdeněk will continue with two talks, one about thin provisioning and snapshoting with device mapper and the other one about disk encryption, why and how to use it. Another talk about filesystems will be done by Edward who worked already on several filesystems and will give a brief comparission of what we have in Linux and what we should have. Jirka Pirko will end the kernel track with a talk about project libteam, about networking devices in general and bonding.

In track #3 the morning starts with several Cloud related talks. Michal and Francesco are both deltacloud developers who deal with different Cloud provider’s APIs. Their talk will show on practical examples who different cloud providers offer and how deltacloud covers them all. Mladen Turk is apache developer who will introduce apache news for cloud providers and users. Niels De Vos will continue with introduction of GlusterFS from the developer point of view. For those who haven’t heard about Gluster yet, this talk is a must.

The party continues even after last talk. The Free movies session will show couple movies rendered purely with open source tools. During both days there will not only be talks but also lab sessions and a free room which everyone can book for a team meeting, small hacking session or a just grouping interested people for additional chat about projects.

Developer Conference - what will you hear during day#1

Wed, 11 Jan 2012 20:36:55 GMT

As I promissed in my previous blog post, let’s look more closer at the Developer Conference 2012 schedule. I won’t tell you much about the JBoss presentations as I am don’t know much about their talks but I’ll try to point you to some additional source to find out more information about these. Looking at the day one, Friday, it will be hard to decid from the very beginning which track to pick. The track#1 starts with series of talks about identity management, policies and auditing. Jakub Hrozek and Jan Zeleny opens up with current development in the FreeIPA project - an integrated security information management solution. Their focus will be on the command-line administration tools and the backend bones like SSSD and kerberos. Their colleagues, Alexander Bokovoy and Andreas Schneider will continue with development plans for FreeIPA 3.0 and uncover some of the feature that are under heavy development right now, including cross-realm trusts, centralized management of keys or SELinux policies etc. Eduard Beneš and Miroslav Grepl will continue diving into SELinux world. Their talk focuses on new SELinux features introduced in Fedora 16, like faster boot, file name transition and more strict SELinux policies. Dmitri Pal will close the first half of the day in the track#1 with future plans of the FreeIPA project including the related projects like directory server and kerberos.

In the second track, František Řezníček opens the day with a talk about unified messaging. He will focus on technologies used in the Red Hat MRG Messaging product like AMQP and its open source implementation Qpid. He will dive into details about its implementation of clients and brokers, the transaction management, queuing, distribution, security and management. He will be followed by Kamil Dudka and Ondřej Vašík who are deeply involved in projects around static code analysis. Their talk will on examples show the most common C/C++ mistakes and describe how static analysis helps the code quality. Adam Tkáč, bind maintainer and developer, works on enabling DNSSEC features in Fedora. His talk will inform you how important DNSSEC is and how key distribution will get easier with dnssec-conf. On examples you will learn how to setup dnssec validation on your Fedora. The last talk before quick lunch will be done by Marcela Maslanova and Jindrich Novy. You might have read GDK’s blog about ISV problems. Dynamic Software Collections is a project that might solve this issue. The projects shows a way how ISVs can redistribute packages needed for their projects in stacks easily with software collections.

Day will continue with several security related talks in the track#1. Peter Vrabec runs the security R&D team in Brno and will show you the project OpenSCAP and scap-workbench. Using this tool you can ensure that your systems meet security requirements and even create your own policy for your servers and production systems. Mirek Trmac will continue with a more general talk about best security coding practices, how to design programs and protocols with security in mind and on examples will show common programming bugs that lead to security flaws and potential risk on the systems. Security sessions will continue and slowly introduce the next topic of the day, secure logging. Steve Grubb will talk about Security Logging Initiative and auditing tools. Why is security a big concern here and why auditing is required by various certification and large companies. Lennart Poettering and Kay Sievers promised a talk about systemd and “Do's and Don'ts when writing system services”. Their talk will uncover some common problems done by programmers when writing daemons and why and how these problems should be avoided. Next guest is Rainer Gerhards, the autoher of rsyslog will talk about rsyslog future and what rsyslog currently implements and you might not know about it. Harald Hoyer showed me his Fedora filesystem on Linuxcon last year. What was so special about it? It will be shown in his talk about streamlined and fully compatible Linux Filesystem Hierarchy. This talk will close the track#1.

In the track#2, Bryn Reeves from Support Engineering Group Europe will describe and day in his life, how Supporting the Open Source enterprise works. Bryn works on complex customer issues from various areas, including kernel, filesystems and others. In his spare time he contributes to a number of projects, including the kernel, device-mapper and LVM2. Jan Hutař coming up next picked an interesting topic - software robot competitions around the world. He will describe what robot competitions are about, what open source competitions are available worldwide and his own robot competition in which anyone can participate. Stanislav Kozina is another Support Engineer on the stage, works on kernel and networking stack and has experience with other OSes including OpenSolaris and HelenOS. Some of his observations and comparissions will be shown in his talk. Phil Knirsch continues with future of yum and rpm - the core of Red Hat based distributions. RPM is heading towards couple changes like plugable depsolvers and yum will come after. With the approaching evening, Thomas Graf will talk about libnl, network config tools for RHEL and kernel QoS and Jaroslav Škarvada will introduce Power management SIG and the results of recent power management work in Fedora.

Developer Conference 2012 - schedule is out

Thu, 05 Jan 2012 12:10:58 GMT

The Developer Conference 2012 schedule was just published this week and in next few blog posts I’d like to introduce talks I find interesting and if you haven’t decided to come yet, it might change your opinion and plans. It’s been already third year we’re organizing this conference, maybe even longer if you count in the old FUDCon Brno and I’m happy to see that there’s a huge interest from various people not only from Europe to come to the conference and give a talk. We always wanted to have this conference as a developers for developers event, all talks are done by people directly involved in upstream development or work in fields like Quality Assurance or Support Engineers and Consultants - all experts in their areas.

One of the complains that we’ve heard last year was that the talks were not grouped by their functional areas and some talks that were related were split apart in two days. We’ve tried to avoid it this year and created seven main areas of interest - Kernel, CoreOS, Security, JBoss, Cloud, Desktop and Others - eg. everything that doesn’t fit any category. More clearly you can see it on a colorful version of the conference schedule.

So what I plan to do is to introduce some talks and give you some insight on what they will cover. Let me know if you are interested in any certain talk, I can always nag those people and get you details. Stay tuned for next post.

What the hack I've been doing yesterday?

Thu, 24 Nov 2011 08:36:18 GMT

Do you those days as well? You wake up in the morning, start your laptop and try to find the presentation you've started yesterday. Surprisingly OO doesn't show it in recent documents and it's not in your docs folder .. and you can't even think of a name of that slideshow (yeah, believe me, happens). Here's a simple trick that saved me ..


$ find ~/ -name "*.odp" -type f -mtime -1

Adjust brigthness directly thru acpi

Mon, 21 Nov 2011 20:18:48 GMT

Since my F16 upgrade the backlight auto adjust stopped working. Not only that, but I couldn't use Fn+PgUp/PgDwn on my Lenovo laptop to change that manually and also `xbacklight --set 100` doesn't work. Got a hint from my friend that actually solved that partially

First search for your acpi driver


$ ls /sys/class/backlight/*/brightness
/sys/class/backlight/acpi_video0/brightness

Figure our your max value


$ cat /sys/class/backlight/acpi_video0/max_brightness 
7

and as a root pass it on


$ echo 7 > /sys/class/backlight/acpi_video0/brightness

Now I could see enough to file a bug against xorg server :-)

My favourite rhythmbox plugin

Wed, 09 Nov 2011 13:56:27 GMT

Desktop Art - don't know if you heard about it already, it's very simple - it gives you info about current track including the cover art on the desktop. Simple, minimalistic but actually really nice.

Installation on Fedora 15 and CentOS 6 is as easy as ..


mkdir -p $HOME/.gnome2/rhythmbox/plugins/
cd $HOME/.gnome2/rhythmbox/plugins/
git clone git://github.com/wippler/desktop-art.git

After that make sure you've enabled the plugin in rhythmbox and also set proper position of the plugin. Quick tip, make sure you have gnome-python2-rsvg installed on your system.

The www.fedora.cz ressurection

Sat, 05 Nov 2011 21:19:56 GMT

It's live since this Saturday. The fedora.cz website got a new design, new home, new owners and new content. In the past the web page mostly served as a forum and great wiki page where the czech Fedora handbook was created. Thanks to great work of Adam "covex" it was kept up2date and the forum active. Anyway, it was time to push it forward. Jiri Eischmann stepped forward and started discussion with his friends from liberix.cz and few colleagues from Red Hat Czech office and it's here. Thanks to them, the new czech Fedora community page is live.

For my English speaking followers, this will be a portal mainly in czech with few exception. Focus is on Czech and Slovak Fedora users and those looking for more detailed content about Fedora participation etc will be still directed to fedoraproject.org.

The goal is to inform in czech about news in Fedora projects, provide simple howtos for those starting with the distro and also inform about local events where Fedora people participate.

Ideas and suggestions are welcome as well as volunteers for creating the content, join the discussions on fedora.cz!

Developer Conference 2012 - time to start planning

Fri, 21 Oct 2011 21:16:57 GMT

Actually, the planning phase is already running for some time and at this point we have to place confirmed and several good speakers coming to the town - check it out at http://www.devconf.cz

So for those who haven't heard about Developer Conference yet - it's a conference that is organized by Red Hat Czech office, local Fedora comminty, JBoss.org folks and few other people. It's focused on development and new technologies, all talks and labs are always technical and require basic knowledge about the project. People giving out these talks are usually developers, either paid by Red Hat or from the community.

It's not the first time we're running this conference. The upcoming one will be the thrid conference after years 2009 and 2011 (check out the page from this year - http://fedoraproject.org/wiki/DeveloperConference2011 ) . The passed conference took two days with two parallel session of talks (during first day even three) and two parallel lab sessions. The talks had couple interesting speakers, the labs were hands-on labs or hack fest like events where the goal was to learn how to work with new stuff or get some stuff done.

For 2012 we already have dates set - 17, 18. February - eg. Friday and Saturday. We have very few talks already promissed - check the http://devconf.cz (fp.o page) with list of speakers. We have few promisses - Gnome hackfest (Doc team, GTK), interesting speakers from kernel etc. and we are working on getting the posters done and lecture rooms finalized.

If you are interested in attending the conference and giving a talk, feel free to sign up on the wiki. Within next month we plan to gather the talk proposals and figure out how to sponsor aditional guest speakes to bring them in. Also if you have any questions about the conference, ping me, Jiri Eischmann or Marek Mahut to get more information.

Power Management Guide

Tue, 02 Aug 2011 12:10:05 GMT

Jarda just pointed me to an updated Power Management Guide he put together with the Fedora Power Management SIG folks. I found it very interesting, right now I'm testing some tuned profiles on my netbook and also tweaking the disk flush time. Let see if the battery will last longer.

OSSConf in Žilina - Fedora 15 talk

Fri, 08 Jul 2011 09:55:10 GMT

If you find the outside temperature to high for you, you want to listen to some interesting talks about open source and you are near Žilina, Slovakia, come to OSS Conf.

My talk is scheduled for tmrw at 16:00 - topic? Fedora 15, Gnome 3, Systemd, ABRT 2.0 and few more things.

Oracle patching abrt

Fri, 10 Jun 2011 08:39:00 GMT

So after looking at latest Oracle Unbreakable 6.1 Release Notes I was wondering what is Oracle patching in abrt.

Well, you don't really get much support from them with abrt, cos by default reporting is disabled with this patch


 -Kerneloops = RHTSupport, Logger
 -CCpp = RHTSupport, Logger
 -Python = RHTSupport, Logger
 +Kerneloops = Logger
 +CCpp = Logger
 +Python = Logger

so you only get local logs. They ship the bugzilla plugin with modified conf file to


 # Bugzilla URL
-BugzillaURL = https://bugzilla.redhat.com/
+BugzillaURL = https://bugzilla.oracle.com/

so that gets you back to what Fedora does if enabled. Still not the way RHTS plugin with Red Hat Support Portal works where it creates a customer ticket and gets you in touch with the Support guys. There are few more interesting things in the release notes, like added btrfs as a tech preview and others. Check if out if you are interested.

Openmobility conference - Call for papers

Sat, 30 Apr 2011 21:06:17 GMT

Openmobility 2011.1 - the conference about open software/hardware in mobile
devices space is going to be held this year (thanks to Red Hat) at FI MUNI on June 18th, 2011. The organizers are looking for interesting talks from the open source
community. The plan is to cover different technologies related to mobile world and keeping these talks highly technical.

See http://tinyurl.com/openmobility2011cfp for more

PS: the Openmobility portal is still Czech only (sorry) but we are open to non-
Czech talks/visitors!

ABRT tweaks - what abrt plugins and abrt.conf can do for you

Sun, 10 Apr 2011 20:43:19 GMT

Most people know abrt from its desktop side - the annoying siren icon and abrt-gui for reporting bugs into bugzilla. But the abrt projects offers several additional plugins and allows to modify the configuration for various usecase. Let's pick one as an example.

Ok, you have a running daemon and when it crashes, you're really really screwed. You want to get notified by email, you want to add a log file or conf file to the report for further analysis and you want to transfer the file onto your logging server.

At first you need to install missing plugins


yum install abrt-plugin-filetransfer abrt-plugin-mailx

The first plugin (filetransfer) offers to compress and transfer reports wherever you want (supported are all curl methods). The second one is obvious, sends mail with crash info.

Ok, now let's configure abrt to attach our file to report.Modify /etc/abrt/abrt.conf
In section [ Common ] add


ActionsAndReporters = RunApp("test x\"`cat component`\" = x\"vsftpd\" && cp /etc/vsftpd/vsftpd.conf .")

In English - if component is vsfptd copy vsftpd.conf into crash dir

The file (vsftpd.conf) is stored locally, but we want to send it to our ftp server.
In abrt.cont section [ AnalyzerActionsAndReporters ] add following


CCpp:vsftpd = FileTransfer

and also modify plugins/FileTransfer.conf with


URL=ftp://user:password@server.name/directory

Don't forget that after every config change you have to restart abrtd


service abrtd restart

We also want to be notified by email if this happens. No problem. Again modify the configuration files. In abrt.cont section [ Common ] uncomment


ActionsAndReporters = Mailx("[abrt] new crash was detected")

and modify plugins/Mailx.conf - change EmailFrom, EmailTo etc

Again restart abrt daemon.

And how to test these settings? Start the vsftpd server and kill it with


kill -11 $(pidof vsftpd)

How to use abrt-cli

Thu, 24 Mar 2011 22:51:58 GMT

ABRT has fairly decent GUI, it also has an applet icon but what if you prefer to use it from cmd line? There's of course an option and I don't think people are aware of it.

First you have to install the cli subpackage. Honestly I think this package should be installed automatically with abrt daemon but I understand that there's no hard dependency.


$ yum install abrt-cli

At first, how do you get notified about a crash when you don't get the alarm icon on your desktop? Everything is logged, so first option is getting it from the log


$ grep abrt /var/log/messages
Mar 24 23:07:05 samo abrt[10153]: saved core dump of pid 10152 (/bin/sleep) to /var/spool/abrt/ccpp-1301004425-10152.new/coredump (339968 bytes)

Not really intuitive, cos you'd have to regularly scan the logs. A more fancy way is to setup the mailx plugin to report crashes locally


$ grep Mailx ./abrt.conf 
ActionsAndReporters = Mailx("[abrt] new crash was detected")

If you're wondering why the above line doesn't work after you restart abrt daemon, it's because you don't have mailx abrt plugin installed


$ yum install abrt-plugin-mailx

You can now tweak the settings in /etc/abrt/plugins/Mailx.conf. Once this is configured you will receive an emails like


2 user@localhost6.loca  Thu Mar 24 23:27  85/1462  "[abrt] new crash was detected"

about new crashes. Next step is to list all unreported crashes (using -f you also get crashes already submitted to your reporter)


# abrt-cli -l 
0.
	UID        : 0
	UUID       : b126dc5cea99f685192e66e6a21c979252817240
	Package    : PackageKit-0.6.6-2.fc13
	Executable : /usr/libexec/packagekitd
	Crash Time : Fri 24 Sep 2010 12:06:18 AM CEST
	Crash Count: 1
	Hostname   : samo

Every crash has it's UUID which looks damn ugly. It also has an id (in this case 0) that can be used for referencing with @ prefix. Also you don't have to remember the whole number and you can use only first few characters - in my case I've invoked


$ abrt-cli -r b12
>> Starting the debuginfo installation
>> Getting list of build IDs
>> 22 missing debuginfos, getting package list from cache
>> 22 missing debuginfos, getting package list from repositories
>> Downloading 6 packages
>> Download 1/6: eggdbus-debuginfo-0.6-2.fc13.i686
>> Unpacking: eggdbus-debuginfo-0.6-2.fc13.i686.rpm
...

And as I've mentioned


$ abrt-cli -r @0

will do the same thing.

After the analysis is finished you get to the report itself opened in vim (or your favourite editor) and you're asked to fill in additional info (like steps to reproduce if possible, additional data, specific configuration options etc). Next step is to go thru available reporters (in my case Logger and Bugzilla) and pick the one you want to use


Report using Bugzilla? [y/N]: y
Wrong settings were detected for plugin Bugzilla
Enter your login: rvokal@redhat.com
Enter your password: 
>> Logging into bugzilla...

(I've terminated the reporting here cos I didn't want to submit my test bug but you've got the idea what happens next)
Using the Logger plugin everything goes to /var/log/abrt and you can use this report for further review and sending it for example via email to your favourite upstream developer.

You can also delete the crashes with -d option and get additional info with -i. More in the abrt-cli manpage.

Žilinská univerzita - Odpoledne s Red Hatem

Wed, 09 Mar 2011 14:54:52 GMT

Pro všechny studenty, kteří přišli na krátké odpoledne s Red Hatem - děkujeme za účast a dotazy!

Pro ostatní - včera jsme na Technické univerzitě v Žilině prošli dvě témata, prvním bylo
Fedora Project a Fedora Packager a následoval Cloud a Deltacloud od Michala Fojtíka.

Something I was always missing in thunderbird

Mon, 07 Mar 2011 07:55:09 GMT

I'm not a native english speaker but like many of you I tend to get tons of emails in English. Today I found a Thunderbird plugin that I always wanted - Quick Translator. After installation just select the target language in bottom left corner and hit CTRL-ALT-T - the highlighted text gets translated in a small popup window. Simple and beautiful!

Where's Red Hat this weekend and next week

Tue, 01 Mar 2011 07:16:53 GMT

We have a few presentations planned in next few days so let's do some advertisement. This weekend myself, Dan Horak and Nikola Pajkovsky are going to Prague to attend and present at InstallFest. InstallFest used to be an event for newbies, people who didn't know how and where to start. The audience grown up and the topics has changed. The goal is now to use Linux on max .. various new technologies get presented including workshops and handson labs. I'm looking forward to an interesting weekend.

In the following week, we're heading to University of Žilina for an event that is organized by us. An afternoon with Red Hat and Fedora, focus on cloud technologies and what gets done inside of the OS to support cloud.

Strange gthumb - libjpeg behaviour

Sun, 20 Feb 2011 12:04:38 GMT

Hmm, I've never seen this before. I had to pictures taken by my Nokia phone. Both needed to be rotated clockwise. First one went smoothly, but gthumb choked on the second one with the following popup window

I've never seen such error before, though it's described in the man page for libjpeg. Anyway, I've opened the very same picture with shotwell, rotated and I got no warning or error. Strange.

Developer Conference 2011 Slides

Fri, 18 Feb 2011 13:08:19 GMT

I've updated the fpo wiki page with links to all slides. Thanks to all presenters for sharing them.

Developer Conference 2011 wrapup

Wed, 16 Feb 2011 08:59:52 GMT

Thanks to all who attended the conference! The audience was great, we had around 170ppl on Friday and the peak on Saturday was around 120. But the more important thing was that the audience wasn't silent, there were several questions to all topics and huge discussions either during the talks or after the talk in the lobby. Lennart didn't get past slide #2 out of his 12 slide talk due to the huge discussion that he has started :-) ..

We've managed to put together 55 various talks and workshops. During Friday we've used 3 lecture rooms and 2 labs and during Saturday we've reduced the number of lecture rooms to 2. Still some of the session were pretty crowded, like Davidz talk and Modern Desktop Alphabet session which I find the most funny one.

Right now I'm collecting all slides which will get posted out soon and I'm reviewing the videos. Unfortunately the quality of the videos is fairly poor but I'll try to process them anyhow.

Pictures were taken by mihl, thanks a lot.

Developer Conference 2011 in Brno

Wed, 09 Feb 2011 21:51:22 GMT

It's only two days before the start of Developer Conference 2011 in Brno, Czech Republic. Thanks for all the help with organizing this event, we've managed to prepare several interesting talks and invite several interesting guests. We're heading down to university tmrw to get everything set up, including the lab, presentation rooms and the place for evening party. For non-czech speaking people I've prepared a quick handout with talks/labs schedule with flagged english talks. I hope it's going to be fun and I'll keep the blog updated with links to slides and videos.