Recently in Pidgin Category

I haven't loaded up an IM client since I upgraded from Ubuntu 9.04 (Jaunty) to Ubuntu 9.10 (Karmic).

But I did today, and neither Pidgin nor the new GNOMEish Empathy would run. (Whether this matters or not, I upgraded from Ubuntu 9.04 to 9.10, as opposed to doing a reinstall.)

I started both IM clients in the terminal to see if I could determine what the problem might be:

steven@toshiba-ubuntu:~$ pidgin
ERROR: Could not load classifier cascade /usr/share/opencv/haarcascades/haarcascade_frontalface_alt2.xml
Illegal instruction
steven@toshiba-ubuntu:~$ empathy
ERROR: Could not load classifier cascade /usr/share/opencv/haarcascades/haarcascade_frontalface_alt2.xml
Error re-scanning registry , child terminated by signal
Run 'empathy --help' to see a full list of available command line options.

(empathy:2527): empathy-WARNING **: Error in empathy init: Error re-scanning registry , child terminated by signal
steven@toshiba-ubuntu:~$

At least both apps seem to be suffering from the same problem, and luckily there is already a bug (#459940) on it in Launchpad. The bug is for the package opencv, and

According to notes on the bug, other GNOME applications affected by the problem include the Totem video player, the Brasero disc burner and Rhythmbox music player.

I can confirm that on my system, every one of those apps will not run.

I also confirmed that the XML file in question is NOT on my box:

steven@toshiba-ubuntu:~$ cat /usr/share/opencv/haarcascades/haarcascade_frontalface_alt2.xml
cat: /usr/share/opencv/haarcascades/haarcascade_frontalface_alt2.xml: No such file or directory

One of the comments in the bug report says:

Thomas DEBESSE wrote on 2009-10-29: #6

seems to appear when installing frei0r-plugins (example: for kdenlive). When removing frei0r-plugins from my karmic I've no error messages at all, and totem (and other apps) runs fine.

Hey, I do have KDEnlive on this laptop. I would've removed the offending plugins package, but I decided first to do a software update to see if Ubuntu's package maintainers took care of the problem.

I opened a terminal and used aptitude to do it:

steven@toshiba-ubuntu:~$ sudo aptitude update
[sudo] password for steven:

Reading package lists... Done

(listing of mirrors hit has been removed for brevity)

steven@toshiba-ubuntu:~$ sudo aptitude upgrade
W: The "upgrade" command is deprecated; use "safe-upgrade" instead.
Reading package lists... Done
Building dependency tree
Reading state information... Done
Reading extended state information
Initializing package states... Done
The following packages will be upgraded:
binutils brasero empathy empathy-doc f-spot libbrasero-media0
libempathy-common libempathy-gtk-common libempathy-gtk28 libempathy30
nvidia-common python python-minimal ubuntu-xsplash-artwork xsplash
15 packages upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Need to get 5,715kB of archives. After unpacking 160kB will be freed.
Do you want to continue? [Y/n/?]

That seems like it would take care of the problem, but the missing file still hadn't shown up. Would a reboot fix things?

After the software update didn't solve the problem, I decided to go into the Synaptic Package Manager and reinstall the opencv packages, which I guessed were libcv1, libhihgui1 and libcvaux1.

That didn't work either.

The next step would be either removing KDEnlive or the offending package, frei0r-plugins.

I went into Synaptic and removed frei0r-plugins.

Nothing changed.

I reinstalled the three opencv libraries (libcv1, libhihgui1 and libcvaux1).

That worked. I was able to run Pidgin, Empathy (which has a nice dialog that offered to import my Pidgin settings, an offer I accepted), Rhythmbox, Brasero and Totem once again.

And KDEnlive seemed to be working, too. It at least loaded.

Let's review: If Pidgin, Empathy, Rhythmbox, Brasero and Totem are not running on your Ubuntu 9.10 system, first update the box, then use the Synaptic Package Manager to remove frei0r-plugins and reinstall libcv1, libhihgui1 and libcvaux1.

I'm a bit surprised that the software update alone didn't fix the problem. While the fix is easy, it's a little bit of "dependency hell" for a package-management system (apt) that is not supposed to suffer from that particular malady.

While I've solved my X issue and now this in 9.10, I probably should have waited an extra month or so before upgrading so these bugs could be shaken out.

Bug #459940 should be closed eventually, but at present it appears that the removal of the offending package and the replacement of those the offender affected is the way out of this problem.

I do have a Launchpad account (I had to create it in order to buy stuff at the Canonical U.S. shop), and I subscribed to this bug so I can keep an eye on it.

I've seen a lot of comments directed at me and others in regard to reporting bugs, and following this bug is hopefully a step in that direction for me personally as a Ubuntu user.

As an experiment, I decided to bring my Evolutionary Computing presentation on making the journey into free, open-source software — a slide show originally created in OpenOffice Impress 2.4 — into Google Docs, which happens to have a presentation app in addition to the better-known Docs and Spreadsheets components.

I revised the presentation — taking some things out, adding others and providing some updates on what I'm doing — and output it as a PDF.

Download that PDF for your reading pleasure by clicking on the image above or the link below:

Evolutionary Computing (revised July 2009)

Interesting note: I believe that no previous entry on this blog has been filed under so many categories. (And I've been considering dumping Categories entirely and just using tags ...)

If you've tried to log into your Yahoo Messenger account with the Pidgin instant-messaging application on any of the many platforms on which the latter runs, it hasn't worked.

It seems that Yahoo is upgrading/reconfiguring its servers, leaving Pidgin users with non-working Yahoo Messenger accounts when accessed through the IM client that brings together the instant-messaging accounts of everything from Google Talk and AIM to Yahoo Messenger and MSN, plus a few more I haven't heard of.

For a few days I used the Yahoo IM client built into Yahoo Mail. I'm somewhat fond of Yahoo Mail and its IM feature, and I do use it from time to time, but I like having the option of using all my IM accounts in one app.

To fix the problem in the Windows version of Pidgin, I first changed one of the server names in the configuration. That didn't work. In Windows, DON'T DO THIS.

Instead, go to the Pidgin site and download the latest version of the app. That will fix the Yahoo issue.

In Linux/Unix, different distributions are handling the problem differently. Some are pumping new versions of Pidgin through their repositories, and those should show up in the updates on your system.

But in Ubuntu 8.04 — the LTS (long-term support) version of Linux, unless you want to install a new version of Pidgin manually, you'll just have to fix the old one.

Luckily it's easy (I figured it out from this Softpedia page):

Once you're running Pidgin (the version in Ubuntu 8.04 is Pidgin 2.4.1 in case you wanted to know), in the menu, click Accounts, then mouse down to your Yahoo account, mouse over to Edit Account and left-click it.

Then click on the Advanced tab, and under Pager server, if you have this:

scs.msg.yahoo.com

Change that line to read this:

cn.scs.msg.yahoo.com

That's right, just add cn. to the beginning of this line, then click Save, and the fix is done.

I don't know if you necessarily must quit and reload Pidgin to make the fix work, but that's what I did. Once I saved my change, I went to Buddies - Quit to kill Pidgin, then I restarted it from the menu.

For now, at least, Pidgin is working with Yahoo Messenger buddies. I'll report back if that changes.

As far as fixes go, this is a minor one.

I decided to get deeper into Puppy 4.1.2 on my Toshiba Satellite 1100-S101 laptop.

I'm always looking for platforms on which I can do all my Daily News-related work, which means I need the Java runtime and Flash video.

Well, there is a Java package for Puppy. I'm surprised Java isn't part of the base install, but it appears not. I installed the package, and I even brought in the Opera Web browser to augment Seamonkey.

Both browsers are performing well, but for some reason Flash doesn't work in either. I distinctly remember Flash working in all of the Puppy 2 and 3 releases I've used previously, and now I'm left wondering what happened.

Also, Java did NOT work in either browser, so easy use of the LogMeIn remote-desktop service is not something happening in Puppy. I'm getting to the point where I'll need to bit the proverbial bullet and install Java from source in OpenBSD on this laptop so I can get that functionality. I can live without Flash (and the Flash I do have in i386 OpenBSD via Opera is marginal at best; it works in YouTube but not in Brightcove). I can sort of live without Java.

But it's better for the work that I do to have both of these things working well.

Also, I was surprised to see not Pidgin or Gaim as the IM client in Puppy but something I'd never heard of. Pidgin is available as a package, so that's not such a problem.

The end result is that while Puppy 4.1.2. runs quite well at first blush, I need to look closer at why I was so unsuccessful at getting Flash and Java to work. It should be easier than this.

And while Flash remains somewhat of a problem in OpenBSD (I probably need to be running an up-to-date Linux such as Ubuntu, Debian, Fedora, Slackware, Zenwalk ... take your pick) I'll probably stick with it for the time being as my primary OS.