Looking for a full time job in Open Source
Two years ago I was really close to canceling my studies and looking for a job instead. In the end I continued studying, passed the final exams of my Diplom (the German old-school equivalent to a Master’s degree) with excellent results and started working on my graduate thesis. Today, I am 1 1/2 months away from the submission deadline and it is clear that I will make it.
So, this time I’m serious: I’m looking for a full time employment in Open Source software development, engineering or management starting November this year. Hiring me will get you an experienced and talented hacker with a natural intuition for software architecture and aesthetics as well as a scientific and painstaking approach to software planning and implementation.
Through my work at the university and within the Xfce and Lunar Linux projects, I have gained experience in/with
- many programming languages (including C, C++, Ruby, Python, Vala, Lua, XSLT, TeX, Java, Bash and a couple of others),
- many frameworks (the whole GTK+/GLib stack including D-Bus, a bit of Clutter, XLib and Qt/QML, SWT/JFace, the FOX toolkit as well as web frameworks like Sinatra and Rails; some knowledge about the Linux kernel, its facilities and kernel-userspace communication mechanisms included),
- many developer tools (GNU compilers, Autotools, VIM, NetBeans, Eclipse and others),
- many software versioning systems (Git, Subversion, CVS and Mercurial), and
- various areas of computer science and software engineering (complexity theory, signal processing, graph drawing, micro-controller programming and sensor-based networking, software planning, testing etc.).
I feel equally at home developing for the desktop or for the web. Granted, my main area of expertise is user interface and middleware development on Linux, which my fellow Xfce hackers and I have successfully participated in, but I’ve always found web development with Ruby to be a refreshing change.
There are many other things related to open source that I love doing. Over the past years I’ve enjoyed being able to improve the transparency of the development and release management of Xfce. Streamlining the release process and providing tools for making release management fun was an initiative I am particularly proud of. The same goes for community efforts like the Xfce Foundation, which we’ve launched in early 2011 and which I am currently heading as president.
This post is not just about the past though, it’s also about what lies ahead. Things I am particularly interested in with regards to the future include
- mobile platforms and applications (iOS and Android are not good enough, I think we need open alternatives),
- multi-touch interfaces on Linux (yep, this is on the way, but there still is a lot of potential work to be done, I guess),
- cloud-based applications (I know I can store files and data on the web, but where are the mind-blowing features that go beyond availability of personal data everywhere?), and
- environmental and power saving applications (living responsibly will become important soon enough; how can we generate awareness and support environmental causes with the help of software?).
I am excited and curious what my role will be in all this. Anway, I guess this is enough information about me for now. After all, this is no biography but a job-search post. ;)
If you read this and you happen to be Microsoft or Apple, do not even bother to send a headhunter. I prefer to work in the open and I believe in Open Source for many reasons. This ecosystem that we’ve created over the past two decades provides a great way for people from all around the world to collaborate on projects they care about, in an honest and tolerant way. I think that’s an inspirational model from which our entire society can and hopefully will benefit. Why would we want to have it any other way?
If you are a member or leader of a company dedicated to Open Source software and are interested in hiring me, please let me know. Linked below are my resumé, software projects and email address. I’m looking forward to talking to you!
Download my resumé/CV — A list of references is included. Feel free to contact them; they are aware of being listed and I’m sure they will be happy to answer any of your questions.
My software projects — A list of open source software projects I am or have been working on.
Email address: jannis@xfce.org
Xfce 4.8 with Conky
I have been following a short discussion on the IRC channel #xfce regarding an issue with the use of Conky and transparency. I didn't use Conky for a very long time, but since I knew it was possible to have Conky perfectly running, I gave it a shot again and since I did a fresh reinitialization of Xfce on my workstation, I tweaked the configuration file to my need. Now I have it running in the background and I'll most probably keep it.The configuration I was able to get for a good working Conky window with transparency is bellow. Of course I could tell you which combination doesn't work, with the why, but since there are so many of them I simply put a working one.
own_window yes # create a separate XWindow over the one from Xfdesktop
own_window_type desktop # the window cannot be moved or resized
own_window_hints undecorated,below,sticky,skip_taskbar,skip_pager # make it behave like it belongs to the desktop
own_window_argb_visual yes # true transparency, a compositor has to be active
own_window_argb_value 100 # make the background semi-transparent
double_buffer yes # avoid flickering
Here is a screenshot of the desktop with Conky in the bottom right corner, I made sure there is some I/O activity going on :-)
 |
| Xfce with Conky |
Xfce 4.8 with Conky
I have been following a short discussion on the IRC channel #xfce regarding an issue with the use of Conky and transparency. I didn't use Conky for a very long time, but since I knew it was possible to have Conky perfectly running, I gave it a shot again and since I did a fresh reinitialization of Xfce on my workstation, I tweaked the configuration file to my need. Now I have it running in the background and I'll most probably keep it.The configuration I was able to get for a good working Conky window with transparency is bellow. Of course I could tell you which combination doesn't work, with the why, but since there are so many of them I simply put a working one.
own_window yes # create a separate XWindow over the one from Xfdesktop
own_window_type desktop # the window cannot be moved or resized
own_window_hints undecorated,below,sticky,skip_taskbar,skip_pager # make it behave like it belongs to the desktop
own_window_argb_visual yes # true transparency, a compositor has to be active
own_window_argb_value 100 # make the background semi-transparent
double_buffer yes # avoid flickering
Here is a screenshot of the desktop with Conky in the bottom right corner, I made sure there is some I/O activity going on :-)
|
| Xfce with Conky |
Xfce mailing lists moved
The Xfce mailing lists moved from foo-projects.org and are now all hosted at mail.xfce.org. Mail addresses were not changed so nobody should experience problems with this, if you do please contact us at email hidden; JavaScript is required.
We want to thank the foo-projects.org crew (yes you Auke) for excellent support in the last couple of years!
— The Xfce development team.
Xfce Design SIG launches
As Jérôme Guelfucci wrote in his blog earlier, a special interest group has been started. The Xfce Design Special Interest Group (or SIG) has a clear purpose (quote from the groups wikipage):
The Xfce Design SIG aims at improving the usability and visual appearance of the Xfce desktop environment. Our goal is to bring interested users, designers and hackers together to ensure neither of them is working in a vacuum. By establishing a context in which they can collaborate on smaller and larger design-related projects we try to increase the chance of the proposed changes to be merged into the official Xfce repositories.
I’m looking forward to working with Xfce directly and more closely after working years with Xubuntu. It’s both easier for us and assures that all Xfce users can enjoy the improvements, not just those who use Xubuntu.
Are you interested specially about Xfce Design? Join us!
Changing PolicyKit settings per user
I have been hit twice by a required authentication on my workstation after the Wifi connection got lost and it is clearly irritating, especially when you are not around. The authentication requests are handled by PolicyKit (polkit for short) and can be tweaked.The message by which I was hit was the following: "System policy prevents modification of network settings for all users."
Before you get started, the system wide configuration files that contain the default values reside inside the /usr/share/polkit-1/actions/ directory. In this directory resides the file org.freedesktop.NetworkManager.policy which contains all the default actions. It does also contain the message about the network settings for which the action id is "org.freedesktop.NetworkManager.settings.modify.system." At this point I was still clueless of what I was supposed to do.
After having search the web for information about PolicyKit I have found one interesting article that helped me getting done with my issue and learning more about this authorization framework. This action being very seldom to perform, I'm summing up everything here.
There are two useful commands to perform tests with PolicyKit, pkcheck and pkaction.
The first interesting command to use is pkcheck. It will trigger an authorization request and prompt you to type in a password, simply return true if no authorization is required otherwise false. For example:
pkcheck --action-id org.freedesktop.NetworkManager.settings.modify.system \You have to adapt the process and user parameters of course.
--process `pidof gnome-session` -u `id -u`
Next the command pkaction can be used to print the default system values, for example:
pkaction --action-id org.freedesktop.NetworkManager.settings.modify.system \Now to have a custom setting for your user, what has to be done is to create a PolicyKit Local Authority file inside the directory /var/lib/polkit-1/localauthority/. Here is an example:
--verbose
[Let user mike modify system settings for network]I have saved this file under /var/lib/polkit-1/localauthority/50-local.d/10-network-manager.pkla.
Identity=unix-user:mike
Action=org.freedesktop.NetworkManager.settings.modify.system
ResultAny=no
ResultInactive=no
ResultActive=yes
There are three main values you can pass to ResultActive that are no, auth_admin or yes. Respectively it will deny the authorization, ask for a password, and give access. For further information about the possible values check the polkit manpage, also don't miss the pklocalauthority manpage to read more about the localauthority tree structure.
Changing PolicyKit settings per user
I have been hit twice by a required authentication on my workstation after the Wifi connection got lost and it is clearly irritating, especially when you are not around. The authentication requests are handled by PolicyKit (polkit for short) and can be tweaked.The message by which I was hit was the following: "System policy prevents modification of network settings for all users."
Before you get started, the system wide configuration files that contain the default values reside inside the /usr/share/polkit-1/actions/ directory. In this directory resides the file org.freedesktop.NetworkManager.policy which contains all the default actions. It does also contain the message about the network settings for which the action id is "org.freedesktop.NetworkManager.settings.modify.system." At this point I was still clueless of what I was supposed to do.
After having search the web for information about PolicyKit I have found one interesting article that helped me getting done with my issue and learning more about this authorization framework. This action being very seldom to perform, I'm summing up everything here.
There are two useful commands to perform tests with PolicyKit, pkcheck and pkaction.
The first interesting command to use is pkcheck. It will trigger an authorization request and prompt you to type in a password, simply return true if no authorization is required otherwise false. For example:
pkcheck --action-id org.freedesktop.NetworkManager.settings.modify.system \You have to adapt the process and user parameters of course.
--process `pidof gnome-session` -u `id -u`
Next the command pkaction can be used to print the default system values, for example:
pkaction --action-id org.freedesktop.NetworkManager.settings.modify.system \Now to have a custom setting for your user, what has to be done is to create a PolicyKit Local Authority file inside the directory /var/lib/polkit-1/localauthority/. Here is an example:
--verbose
[Let user mike modify system settings for network]I have saved this file under /var/lib/polkit-1/localauthority/50-local.d/10-network-manager.pkla.
Identity=unix-user:mike
Action=org.freedesktop.NetworkManager.settings.modify.system
ResultAny=no
ResultInactive=no
ResultActive=yes
There are three main values you can pass to ResultActive that are no, auth_admin or yes. Respectively it will deny the authorization, ask for a password, and give access. For further information about the possible values check the polkit manpage, also don't miss the pklocalauthority manpage to read more about the localauthority tree structure.
Changing PolicyKit settings per user
I have been hit twice by a required authentication on my workstation after the Wifi connection got lost and it is clearly irritating, especially when you are not around. The authentication requests are handled by PolicyKit (polkit for short) and can be tweaked.The message by which I was hit was the following: "System policy prevents modification of network settings for all users."
Before you get started, the system wide configuration files that contain the default values reside inside the /usr/share/polkit-1/actions/ directory. In this directory resides the file org.freedesktop.NetworkManager.policy which contains all the default actions. It does also contain the message about the network settings for which the action id is "org.freedesktop.NetworkManager.settings.modify.system." At this point I was still clueless of what I was supposed to do.
After having search the web for information about PolicyKit I have found one interesting article that helped me getting done with my issue and learning more about this authorization framework. This action being very seldom to perform, I'm summing up everything here.
There are two useful commands to perform tests with PolicyKit, pkcheck and pkaction.
The first interesting command to use is pkcheck. It will trigger an authorization request and prompt you to type in a password, simply return true if no authorization is required otherwise false. For example:
pkcheck --action-id org.freedesktop.NetworkManager.settings.modify.systemYou have to adapt the process and user parameters of course.
--process `pidof gnome-session` -u `id -u`
Next the command pkaction can be used to print the default system values, for example:
pkaction --action-id org.freedesktop.NetworkManager.settings.modify.systemNow to have a custom setting for your user, what has to be done is to create a PolicyKit Local Authority file inside the directory /var/lib/polkit-1/localauthority/. Here is an example:
--verbose
[Let user mike modify system settings for network]I have saved this file under /var/lib/polkit-1/localauthority/50-local.d/10-network-manager.pkla.
Identity=unix-user:mike
Action=org.freedesktop.NetworkManager.settings.modify.system
ResultAny=no
ResultInactive=no
ResultActive=yes
There are three main values you can pass to ResultActive that are no, auth_admin or yes. Respectively it will deny the authorization, ask for a password, and give access. For further information about the possible values check the polkit manpage, also don't miss the pklocalauthority manpage to read more about the localauthority tree structure.
How to fix broken Xubuntu Natty panels?
Since many people have had problems with the Xubuntu Natty panels due to bug #747137 (which is fixed now), we thought it would be nice to tell how to fix the panels. Here goes:
- Log out from Xfce
- Open a TTY (eg. press Ctrl+Alt+F1)
- Log in in the TTY
- Run ‘rm -rf $HOME/.config/xfce4/xfconf/xfce-perchannel-xml/xfce4-panel.xml’
- Log out from the TTH (‘logout’ should do the trick)
- Get back to TTY7 (Ctrl+Alt+F7) or if that doesn’t work, TTY8 (Ctrl+Alt+F8)
- Log in and your panels should be now fixed and have the default settings
Note that this problem with the panels only appears on systems already running Natty, new installs shouldn’t be affected.
important strategic decisions
Posting our recent decisions for Foresight Linux as sent to the mailing list by doniphon:With the ongoing mess with the gtk2 -> gtk3 migration, followed by
the announcement of the gnome reschedule, and the gnome-shell/unity
rift, we do think our 2 major desktops gnome and xfce are rendered
unusable for the unforeseeable future. Same counts for kde as nokia
started to drop support for qt. Therefore we decided to focus our work
on getting in e19, a major enhancement to enlightements e17, using an
improved and hw accelerated curses library, done by us on a still
private bitbucket repository. This change also involves getting rid of
the much hated combination of pulseaudio/alsa in favour of the much more
modern and stable OSS 4.2, and entirely dropping Xorg and evolving to
Xfree2k. We're looking foreward to provide a superior user experience
soon with fl:3++. We'll shortly set the e19 repository to public, so you
all can benefit (and contribute) after signing our standard contribution
agreement that cedes all your present and future rights to Paris Hilton.
As a side note we'll be moving our default kernel to MinixNG too.
Have a nice day.
Porto, 1th April 2011
The Foresight Linux Council
