Category Archives: Software

Conzilla 2.2.4 released

Two bug fixes:

  • Non-ASCII URIs could not be properly published to Collaborilla (this bug made this quick bug fix release necessary)
  • The reload button did not take the threaded/unthreaded setting into consideration

As usual, Conzilla should update itself through Java Web Start. Have fun.


Conzilla 2.2.3 released

This is a maintenance release, fixing the following bugs:

  • “Contexts” context menu was disabled when clicking for the first time
  • Shortcut and menu for closing a tab/context-map did not work
  • “Window”-view could not be closed via X-button in the window frame
  • “Save” button was always enabled
  • HTTP implementation of RemoteStorage did not timeout properly
  • Multithreaded loading of maps caused problems; it is optional now and deactivated it by default
  • Sindice client did not time out
  • Metadata popup sometimes showed up beneath map elements
  • Added menu to manually clear the container and metadata caches
  • Content URLs did not open in a browser on newer MacOS systems

Conzilla 2.2 requires a Java Runtime Environment in version 1.5 or newer and can be installed via the download page. If you already have an installation of Conzilla 2.1 it should be sufficient to launch Conzilla via the shortcuts. Java Web Start will then take care of the upgrade.

If you have comments or suggestions you can send them directly to the Conzilla mailing lists.

Hardy, Java and crashing applications

Following up my problem description in my last post, I tried to get Eclipse (and other crashing Java applications) running with the Java 6 version that is shipped with Hardy.

The changelog of the packages sun-java-* (version 6.06) claims that the locking problems with XCB have been fixed upstream:

* New upstream bug fix release.
  - Release notes at
  - Fixes Xlib/XCB locking problems. LP: #86103. Closes: #414535.

But this is not the case, at least not for me.

Googling the problem showed a few potential workarounds, like



sed -i 's/XINERAMA/FAKEEXTN/g' /usr/lib/jvm/java-6-sun/jre/lib/i386/

Neither of them worked. So I’m back with Java 6 from Gutsy, which just works fine on Hardy.

I wonder whether I am the only one with these problems… are they going to release Hardy with a broken Java/XCB combination?

Upgrade to Hardy

I updated to my Ubuntu system to version 8.04 “Hard Heron” RC. It’s a release candidate, so there won’t be many changes until the “real” release in a few days.

The upgrade process itself went through without any problems, but I had to fix a few things which did not work anymore after the upgrade. There was:

  • Applications using GL kept crashing themselves (like fgl_glxgears) or the whole X-server (like Google Earth).

Not good. It turned out that my fglrx installation was somehow broken, Ubuntu even told me that I’m not using any proprietary drivers. So I downloaded the new 8.4 release of fglrx, baked my own debs and installed them.

Nothing crashed, but the applications refused to start because of missing library: This might indicate a slightly broken fglrx package creation for Hardy. Anyway, a symbolic link solved the problem.

ln -s /usr/lib/ /usr/lib/
  • Eclipse kept crashing

Eclipse started, and during building the workspace, it always crashed. I tried without plugins, a fresh installation, etc, then I downgraded Java 6 to the version from Gutsy, and everything worked.

It was enough to pull the packages sun-java6-bin, sun-java6-jdk, sun-java6-jre, sun-java6-plugin and sun-java6-source out of the Ubuntu archives and install them. To make Ubuntu’s update notifier stop bugging me about the existing newer packges (which I just downgraded) I set them all on hold via

echo {$packagename} hold | dpkg --set-selections

The problem might be connected to libxcb and libmawt, because instead of a crashing VM I sometimes get the following messages:

Locking assertion failure.  Backtrace:
#0 /usr/lib/ [0xb7d00767]
#1 /usr/lib/ [0xb7d008b1]
#2 /usr/lib/ [0x903d91bd]
#3 /usr/lib/jvm/java-6-sun-

I remember having had some similar problems in Gutsy (or was it Feisty?). I will look into this when I’ve got some more time.

  • Firefox 3 does not support old add-ons

The default browser in Hardy is Firefox 3 (there is still packages will Firefox 2 if you want to). That’s good and bad. It’s good because it feels more lightweight and JavaScript-heavy sites feel much more responsive. It’s bad because it’s still a Beta (I already experienced a few crashes) and because some popular extensions like Bookmarks are still not compatible with the new version.

To keep it simple, I added the following boolean setting to the configuration (about:config):

extensions.checkCompatibility = false

This will give you a warning inside the Add-ons window, but most of the officially incompatible extensions will work after that.

No other problems with the new version so far. 😉

Conzilla and Collaborilla go REST

I just released Conzilla 2.2.2 together with Collaborilla 1.1. The biggest improvement of these versions is the switch to RESTful web services, which makes it finally possible to access Collaborilla even in very restrictive networks – the new services use standard HTTP port 80 which shouldn’t be a problem anymore. To make the picture complete, I also added support for HTTP proxies, so there is no excuse anymore for not being able to use Conzilla.

The noteworthy changes since version 2.2.1:

  • Support for Collaborilla 1.1 and the new RESTful web services
  • Support for connections through HTTP proxies
  • Possibility to conditionally empty the disk caches
  • Fix for problem on MacOS which prevented to open URLs in web browsers
  • Fixed some NullPointerExceptions

Go and get it. Or if you already have an older version: just launch it via Java Web Start, the upgrade should then take place automatically.

Finally upgraded to Gutsy

I finally did it. Everything went fine, except for the proprietary ATI/AMD fglrx graphics driver and the related setup. To get suspend to work I had to upgrade to the latest fglrx driver. After this the UI felt pretty slow, much slower than it was before the upgrade. Impress was almost unusable, it took about 5 seconds for a slide change.

The problem consisted of two parts, one was that cpufreqd was slowing down my CPU. I didn’t have it installed before, so I removed it. I’m relying on the ondemand governor anyway. Then I also added the following options to the device settings in my xorg.conf:

Option	"XAANoOffscreenPixmaps"
Option	"AccelMethod"	"XAA"

No my X is as fast as before, I even gained a bit of 3D performance with the new fglrx drivers.

Suspend and wake up works also after I set the following options in /etc/default/acpi-support: