PulseAudio: system mode broken

Ever since version 1.1 of PulseAudio was released, remote audio stopped working for me. Basically, the tunnel created by enabling "Detect native remote PulseAudio sinks" in paprefs on the client side immediately crashes the PulseAudio server on the remote host. I reported the issue at Free Desktop bug #49681. The issue still exists in version 2.0, which is what Debian's next stable release is supposed to ship (and in 2.1, available via the experimental repository). This essentially means that I cannot upgrade my hosts to Wheezy without losing my remote speakers. Would anybody knowledgable enough with PulseAudio internals be able to help me track down the cause of this bug?

OpenWRT: SLAAC and DHCPv6 on White Russian

As I recently reported, I have been trying to configure my Linksys WRT54GL running the OpenWRT firmware (version 0.9 a.k.a. White Russian) to support SLAAC and DHCPv6 out of the box.

Most of the feedback I got involved upgrading the OpenWRT firmware to a more recent release that might not fit the available storage capacity of the device, which felt like too risky of an operation to attempt.

The solution I found instead involved adding ipkg sources to OpenWRT's backports repository, which offers a minimalistic DHCPv6 client. Although I haven't been able to find any proper documentation for this client, the content of its configuration file is mostly intelligible. What remains now is to actually configure it to cooperate with the kernel's native SLAAC implementation and, whenever an IPv6 network is found on the ISP side, to propagate the address space, DNS and routing information to my LAN using radvd.

Would anyone located within the Helsinki metropolitan area happen to have an IPv6 testing environment that would at least allow me to configure and test my router?

OpenWRT: accepting Router Adverts from the ISP in White Russian?

As we are getting closer to the World IPv6 Day, I thought that I'd see if I can upgrade my WRT54GL's OpenWRT (White Russian) installation to accept Router Adverts from the ISP to acquire an IPv6 address (rather than via a 4-to-6 tunnel broker, which seems to be the most documented case), and to propagate its IPv6 address space to my local network via my WRT45GL's radvd. Unfortunately, most of the instructions out there concern newer OpenWRT releases to which I cannot upgrade to because their software base takes up significantly more space than White Russian does. Still, I figure that someone in the community must have already succeeded at configuring their WRT54GL for this and might be able to help. Anyone? :)

Ubuntu: LTS to LTS+1 upgrade leaves cruft

Over the past few weeks, I upgraded my Ubuntu hosts to the Precise release due to be published next month. While the upgrade on my desktops from Oneiric to Precise went mostly well, the upgrade of my terminal server from Lucid to Precise was more daunting. In short: too many packages leave an undue amount of cruft behind, namely tons of obsolete configuration files that are not correctly handled by maintainer scripts, to either delete obsolete files or to rename them to the currently valid filename. At Debian, these oversights are periodically monitored using piuparts and reported to the package maintainer, but Ubuntu doesn't seem to offer this sort of automated Quality Assurance process yet. Perhaps this would be something worth developing?

PS: For those who wonder how I spotted those obsolete configuration files, I simply enabled the FLAUSCH environment variable before running upgrade-system.

Adopted: ispell-et, myspell-lv, rus-ispell.

Over recent months, I have been pondering the relevance of my Free Software involvement a lot:

More than anything, it constantly feels more and more like several important distributions and projects are moving in directions that break with the old ways far too radically, by breaking software usability rules such as "least surprise", "works out of the box", and "if it ain't broken, don't fix it" either to try new approaches to addressing existing needs or simply for change's sake.

Another aspect lies in my usual motivation for packaging or adopting software: because I need it and nobody else bothered doing it. Further reflection made me ponder what, correspondingly, are my usual reasons for dropping software: because what exists already works and because everybody and their grand-mother already invented a million of ways to handle the same issue.

Which brings us to today's news.

What prompted me to hand the dictionary packages I maintained over to someone else was a combination of "no longer need it" and "it already works fine as it is."

For instance, the Estonian dictionaries haven't seen any upstream release since the initial one in 2003. While I still use Estonian daily in my online communications, the last 9 years have mostly been spent making minor changes to the dependencies and maintainer scripts, just to keep the package compliant with current Debian packaging policies and with ongoing improvements to the dictionary-common maintainer tools. This is not the sort of work that requires any knowledge of the Estonian language, so I felt that having dictionary-common developers handle those technical transitions in a clean and across-the-board way for as many dictionary packages as possible would be more productive than me trying to keep track of those changes by myself.

A similar case applies to the Latvian dictionaries. While there have been occasional upstream releases, some of which required patching the source code, maintaining the package has mostly been about tracking Debian policy changes and dictionary-common functional changes. Additionally, my interest for learning Latvian has dramatically dropped over the years, so I no longer saw any point in remaining involved in maintaining the package.

Ditto for the Russian dictionaries: occasional upstream releases, occasional patches, regular packaging upgrades to keep up with the Debian policy and with dictionary-common functionality, but no longer much of anything than a passive interest in practicing my Russian.

One of the developers behind dictionary-common, Agustin Martin Domingo, frequently helped me make sense of the changes I needed to track in the past, so he gladly accepted taking over the technical maintenance of all 3 packages. The Estonian dictionaries, while extremely skim in the breadth of vocabulary they cover, remain useful, but are essentially deprecated, as the upstream author is working on a spell checking engine similar to what Voikko does for Finnish, which is why maintaining them will be a rather easy task for Agustin. Meanwhile, Aigars Mahinovs passively remains on board for the Latvian dictionaries, while the Russian dictionaries have been adopted by Mikhail Gusarov, in both cases with Agustin assisting on technical matters.

Basically, I feel that passing the maintenance over to people whose motivation remains high is a better way to guarantee those packages' future than leaving them in my unmotivated hands and I'm glad that I found someone to keep on packaging them.

PS: happy Valentine's day to everyone!

xf86-video-geode 2.11.13

A few days ago, I pushed out version 2.11.13 of the Geode X driver. This is the driver used by the OLPC XO-1, by a plethora of thin clients such as the ThinCan, by low-power desktops such as the Linutop and by a few notebooks such as the eCafé EC800.

While this release indeed features a few bugfixes (mainly to keep this driver compilable on the latest X server), the lion's share of the changes involve a complete overhaul of the build scripts, courtesy of Gaetan Nadon. The key motivation for this overhaul was to acknowledge the efforts made by third-party contributors to make the driver compile on BSD variants. Sure enough, this release finally compiles on FreeBSD and, low and behold, on Hurd.

However, the hybrid nature of Debian's FreeBSD kernel-based GNU operating system variant posed an additional challenge, because it provides usable support for Video for Linux version 2 (V4L2), but without the full complement of Linux definitions. This resulted in one post-release commit (included in Debian and Ubuntu package 2.11.13-2), following which my assertion that we could now safely define this package as Architecture: any-i386 finally proved to be a safe one for Debian-based operating systems.

At this point, I'm curious as to how many more operating systems, especialy BSD variants, can finally use this driver. Patches to further improve support of non-Linux systems are welcome.

Proposed updates for CUPS-PDF packages at Ubuntu

For those who use CUPS-PDF on Ubuntu, I have pushed some updated packages into Lucid-proposed, Maverick-proposed and Natty-proposed, mainly to make the package's post-install actions bulletproof, so that automated installs and PPD updates take place in a flawless way. Comments from anyone who tested these package updates are welcome on Launchpad bug #805947. Once these updates have been approved, I'll go through the daunting task of reducing the debdiff down to its utmost essential components and attempt to submit a stable-update to Debian as well.

Configuring GNOME themes for both gconf and dconf?

For a number of years, I've been making myself metapackages that pull favorite packages and pre-configure the desktop environment to use my favorite global default settings. This currently means configuring the gconf keys for the GTK theme, icon theme and background image for GDM. Until now, I implemented this by calling gconftool-2 directly in postinst as user gdm but Lintian recently started warning me that the correct way to do this would be by calling gconf-schemas or update-gconf-defaults instead. I was thus wondering, would anyone have any sample code that accomplishes this? To further complicate things, GNOME 3 has transitioned from gconf to dconf, which suggests that a slightly different method needs to be used to perform the same. Would anyone have any sample code to implement this? Thanks in advance to anyone who can help me with this!

X.org video driver Geode 2.11.12

Today we published version 2.11.12 of the X.org Geode driver, code-named "Squeezing the Wheezy out of Debian" in honor of the recent Debian stable release. 2.11.12 is yet another minor bug-fixing release, this time featuring yet another EXA fix for the LX component, courtesy of the OLPC team, plus the removal of an obsolete V4L1 include that was preventing the building of the ztv video input component of our driver since Linux kernel 2.6.38 - thanks to the Fedora and Ubuntu teams for spotting this!

Adding default support for Airport remote sinks in PulseAudio

In another case of "what were they thinking?" it has been my displeasure to find that support to discover remote Apple Airport audio sinks is not enabled by default in PulseAudio and, in practice, enabling this requires the user to install paprefs just to enable the loading of two modules (module-raop-discover and module-zeroconf-discover) that really should have been loaded via the global /etc/pulse/default.pa by standard. The question is, why? I perfectly understand not enabling the publishing of local audio sinks by default, but why prevent the discovery of remote audio sinks by default? More to the point, why force the end-user to jump through hoops and Google for hours just to enable something that really should have worked out of the box?

New GPG key released - signatures welcome

Having rediscovered the wonders of GPG, I finally got around generating myself a 4096R key, signing it with my old key and issuing a transition statement. Given this, if

1. You happen to have signed my old 1E0CB9CD key at DebConf5 in 2005, at Solutions Linux 2008 or at some Free Software event in Finland or in the Baltic countries over the past 7 years and
2. You're satisfied with the content of the transitions statement,

your signature would be appreciated on my new C4B4D7B6 key.

Ubuntu kernel at 1000Hz with PREEMPT enabled?

Back when Linux kernel 2.6 was released, one of the immediate benefits that I noticed was how beautifully responsive my desktop had suddenly become. As it turned out, Linus figured out that he would create a buzz to accompany kernel 2.6's release by having a default clock rate of 1000Hz. However, the excitement was short-lived and kernel defaults were soon brought back down to a more conservative rate of 250Hz, allegedly because some peripheral chips could not handle such a high frequency bump without producing an increased amount of processing errors.

Adding insult to injury, Ubuntu defaults eventually dropped another responsiveness enhancement, kernel preemption, allegedly because the goal was to have a one-size-fits-all kernel shipping with Ubuntu and preemption was detrimental to the kernel performance when the host is used as a server, which was a problem because Ubuntu had somehow decided to shift its focus from the desktop market towards the more lucrative server market.

While there is nothing wrong with universally-safe kernel defaults or with a corporate decision to shift a distribution's focus towards more lucrative markets, it nonetheless left me pondering what would be the best way to get a 1000Hz kernel with preemption on my desktops, without constantly having to crank out my own kernel packages. As such, I was wondering if there would be enough traction from desktop users to justify producing such a kernel and to make it available as a post-install option from the Ubuntu repository?

PS: I'm already aware that a specialized Ubuntu kernel is available to cater for the needs of audio production, but my understanding is that it has power management disabled, because it can interfere with the real-time operation of MIDI devices, while normal desktop users would definitely want to have power management enabled.

Ubuntu no longer ships debian/changelog since Natty?

Since a few days, I have started to notice that the "Debian" changelog that normally ships with packages no longer appears with a number of recent package updates. Is this intentional?

An old GRSec feature I miss in stock Linux 2.6 kernels

Ages ago, when building my own kernel packages was my main hobby, I used to apply the GRsecurity patch to my kernels. One of the main benefits I found in this patch was that it would make the kernel terminate or, if that failed to have any immediate effect, downright kill any application that suddenly requests an unreasonable amount of system resources. I was wondering if stock Debian and Ubuntu kernels offered any similar feature that could be enabled e.g. via some /sys register?

Batch-editing EXIF data to add copyrights?

I've recently become more serious about my photographic hobby and it dawned onto me that manually editing each JPEG to add my copyright was entirely the wrong approach. Thus, I was wondering if anybody would know of a Free Software tool that can batch edit the EXIF data in JPEG images? What I'd like to accomplish is simple:

• Add the string Copyright ©$YEAR Martin-Éric Racine where $YEAR is directly extracted from the original EXIF data's day when the picture was taken.
• Optionally, produce smaller versions of the source images to an output folder as TFCD samples for my models to take home.

Preferences go for a tool that is already packaged for Debian or Ubuntu but, worst comes, I could package the software myself.

X.org video driver Geode 2.11.9

Released just a few hours ago:

We are pleased to announce this maintenance release of xf86-video-geode. It features a plethora of bug fixes, a few documentation updates and one performance enhancement. This release also marks the return of Advanced Micro Devices to the development team. Please read the content of NEWS for more details.

In practice, this Geode 2.11.9 release mostly fixes the growing number of rendering issues that were exposed with each successive release of the X.org server core. Among other things, it restores the ability to correctly view video streams on Totem and other media players, it fixes icon rendering bugs that affected various desktop environments and web browsers, it removes all remaining compiler warnings and, as a byproduct of fixing one rendering issue, the speed of our driver improved dramatically.

This is one release that will definitely please users of the OLPC XO-1 and of thin client hardware running on LTSP!

Hell just froze over a.k.a. Squeeze is frozen

Just noticed about an hour ago on debian-announce: Squeeze entered into freeze tonight. Hurray! What this means in practice is that, unless a new version of something fixes a serious bug, it will not be allowed to trickle down from Sid into Squeeze on time for the actual release.

Still, I cannot help but feel sad that it happened just a few days short of upstream releasing the Geode 2.11.9 driver for X.org, because AMD recently committed a lot of resources towards fixing all outstanding issues on this driver and yet one major Linux distribution is about to release without those fixes, unless the Release Manager agrees to let us squeeze 2.11.9 into, well, Squeeze. Doable? Possibly, if enough people calmly ask the Release Manager for it.

A small death, a big birth.

I dunno why, but hearing bagpipes always gives me the creeps, probably because their melodies sound like a whole country was just brutally slaughtered and is being mourned.

Sure enough, this morning, on my way to pick up my new national ID card matching my new citizenship, I ran into a Scottish regiment warming their bagpipes in preparation for the Police marching band festival of Helsinki and instantly had goosebumps, to the point of running a mental list of everyone among my relatives who might have crossed the Styx during the last few hours. While my mother's recent ailments have indeed been a source of concern, I simply couldn't think of any reason for them to degenerate to a fatal extent, so I mentally crossed that possibility out.

Still, even after marching a few blocks further downtown towards the central police station, I simply couldn't shake the deep sadness that got onto me upon hearing the bagpipes rehearsal.

By the time I reached my destination, an answer came: before I could get my new ID card, I'd have to surrender my old Foreigner's ID card. As odd as it might sound, I felt sad to let go of that pink-tinted little bugger. See, as much as I've hated being a foreigner all these years, that pinkish ID card was my only legal tie to this country and the photo of me it bears represented an important phase of struggles in my life, a phase that I would have loved to document in any possible way. Alas, it was not possible, so I gave one last look at my old card, handed it over and took my new blue-tinted citizen's ID card in exchange.

Walking back across downtown towards my home, all I could do was stare at my new ID card in disbelief: the Citizenship line indeed said FIN. I suppose that was the real message: C'était la fin d'une citoyenneté et le début d'une autre. Une petite mort, une grande (re)naissance. Sehän on hyvä vaihtokauppa, miun puolesta.

Firefox is a CPU killer!

Since a couple of days, the mere act of launching Firefox is sufficient to get my Dell D430's CPU to overheat to the point of shutting itself down, within a few seconds of launching the application. Two questions:

• Who the heck are the bastards that designed a laptop with such poor ventilation?
• Who the heck are the bastards that coded such a hideous piece of bloated browser?

I know that I've previously vented out frustration over Firefox's shortcomings, but now this application-specific CPU overheating crap is just too much. Dammit!

On pohjantähden alla, Tää koti mulla mainen, Mä elämästä laulan...

My girlfriend and I were out picking up a cake at the bakery last week, when my phone rang:

• Hello, I'm calling about your application. I just spent the last hour discussing your case with my boss and there's just one thing that bothers us: do you ever intend on paying your residual taxes?
• I received those payment slips right after I became unemployed and, as you know, living off unemployment benefits in this country's most expensive city doesn't exactly leave anyone with money to spare...
• Say no more! Moving to the capital for this job was a real shocker. The rents are so bloody expensive here! Anyhow, do you intend on taking care of those residual taxes as soon as you get a job?
• Yup, just like I said in my application.
• Alright, then I guess that everything is in order. We can start processing your application today. We obviously cannot make any promise about how long that's gonna take, but I would think that the decision should come fairly soon.
• Wow! That's excellent news! Thanks again for your help!
• You're welcome, sir. Have a nice day!

Without knowing, at that moment, I had just become a citizen of the country in which I have been living for the past 12 years. It was only yesterday, upon receiving the decision in the mail and looking at the date on the certificate that I realized that, when I got the phone call, the decision had already been made and the bureaucracy was only looking for reassurances that I fully intend upon acquitting my civic obligations as soon as humanely possible.

To say that reading the decision was a highly emotional moment is an understatement. Trying to explain the intensity of this moment to my girlfriend, I compared it to the day when a teenager reaches adulthood. This instant brought a similar feeling: suddenly, the whole EU opens its doors to me and I'm free to decide how to best use the opportunities it offers.

What next?

For now, completing this government training to become a bureaucrat. Funnily enough, becoming a citizen resolved the whole issue of background checks, which also suddenly triples the number of possible venues for the on-job part of the training. In my case, it looks like I'll be spending the next few months at the Ministry of Employment and Entrepreneurship, working on EU projects that fund R&D efforts and export sales ventures in each member state.

After that, I'm not sure.

On one hand, I'd like to apply for the Ministry of Foreign Affairs' KAVAKU recruitment program for future diplomats. On the other hand, that ministry is extremely picky about whom it accepts and it's not particularly known for favoring naturalized individuals. This being said, our current Minister recently published rather ambitious plans to completely reform the Ministry by bringing in seasoned professionals from the private sector who could efficiently promote Finnish know-how and products abroad, rather than hiring more of the same Public Administration graduates, so, who knows? Maybe the time is right for someone like me to join the ranks of the Finnish diplomacy?

An other option that I'm considering is to permanently move to Estonia. When my last job there ended, I was left with the feeling that I could have accomplished a lot more, if only I were in a legal position to move there, rather than commute a couple of times a week. Beyond the pioneering work that myself and my diplomat friends at the Estonian embassy did in Turkey, there was a demand for us to perform the same magic in other countries of interest to Estonia. Unfortunately, not being in a position to be on-site and no longer having a job that paid for me to be there often enough meant that I had to pass on that opportunity. Now, seeing how one of my friends recently left the diplomacy and is open to new challenges, I'm wondering if now might be a good time to resume our operation and prepare our next campaign?

Wow... So much to think about, now that a whole continent opened its doors to me. Hienoa! Olen suomalainen.