Wednesday, March 18. 2009School nightmares![]() From xkcd #557: FULL ACK! In the first years after my school graduation, already attending university, those dreams developed the situation that graduates are compelled to revisit school for one month every year to refresh a basic knowledge in various subjects—a not too weird idea after all. I went through situations like not remembering the location of our class room, teachers being upset about me not having shown up for long, or having hopelessly missed several exams. Through the years those dreams had to cope with my consciously strengthened memory about my school graduation and about that such a revisiting month simply doesn’t exist. However, a geeky brain like mine is still able to form a new plot. I think I got rid of those dreams with my university graduation, having settled the idea of not having to attend unpleasant exams ever again. But I probably enjoy being a science/math/computer nerd way too much and should deal more with average daily knowledge about politics, economy, society and culture. A reason why those dreams come up at all might be that stress and pressure at school are much more formative than they will later be in real working life.
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Sunday, March 15. 2009Macht mich das rasend?![]() Ich habe einen alten Forenbeitrag von mir aus dem Jahr 2002 ausgegraben, den ich aus aktuellem Anlass sogar unverändert wiedergeben kann:
Und auf die aktuelle Amoklauf-Diskussion bezogen: Klar spielt auch ein psychisch gestörter Waffennarr gerne Ballerspiele. Das ist aber Wirkung, nicht Ursache. Amokschützen gab es doch schon vor zig Jahrzehnten. Für gesunde, ausgewogene Psychen sind actionreicher Sport, Spiel, Filme und Games einfach eine Möglichkeit sich auszugleichen, abzureagieren. Wenn politisch Aktive lieber die Unterhaltungsmöglichkeiten für alle Bevölkerungsschichten einschränken, liegt dies wohl eher an Macht- und Kontrollsucht und einer starken Waffenlobby. Das ist ein Grund zum Fürchten! Im übrigen ist es wohl eher die schlechte Kombination von hohem Testosteronspiegel und angeschlagener Psyche, die in Aggression, Raserei, Gewalt, Krieg, usw. mündet. Dummerweise führt genau das aber auch zu führenden politischen Ämtern. Friday, March 13. 2009Free software vs. Microsoft![]() The fact that the idea of free software is so contrary to the behavior of Microsoft is exactly reflected by how their respective representatives act in their talks. Here’s a quick video edited by myself from sources I found on YouTube: It’s totally up to you who you trust. Wednesday, March 11. 2009Freedom and confinement now over![]() It was exactly three years ago when I sold my previous car. The months before that sale were such a torture and the sale itself was such a relief that I decided to go on without an automobile for some time. I had been living in a vicious circle: I rarely used the car as it was always broken, and it was always broken as I only used it rarely and had it parked outside in all weathers. And because I actually only needed it rarely in the big city, it wasn’t that hard living without one. However, it really would have been impossible without Doris’ company car that enabled a casual weekend shopping or similar. But furnishing our new home outside the urban area was unthinkable with that small vehicle, what forced us to borrow a car from our families once in a while. Our demands have changed and the torture is now exactly on the immobile side, what led us to the acquisition of a more spacious vehicle. We broke it down to a Škoda Fabia station wagon, as the Octavia model provides more space than we really need. Although a certain Austrian cabaret artist makes fun of people who buy a Škoda with extra equipment (i.e. those who want to have everything but don’t want to pay for it), we just became such folks. It’ll be a Fabia II Combi Elegance 1.6 with 77 kW in Flamenco red Anthracite gray and will arrive at the beginning of May. The list price was just under €20,000.
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Thursday, March 5. 2009What a speed gain!![]() I complained about my old notebook being too slow at image processing. As I now run a new machine, it’s time to measure the performance increase: Old system: 1×1.6 GHz CPU, 1 GB RAM Task #1: Render 8 RAW images to PPM in multi-parallel for file in *cr2; do time dcraw $file & done Old system time: 1 min 41.1 sec New system time: 0 min 04.6 sec → 22× faster Task #2: Render 8 RAW images to JPEG in multi-parallel for file in *cr2; do time convert $file $(basename $file .cr2).jpg & done Old system time: 5 min 0.0 sec New system time: 0 min 18.2 sec → 16.5× faster Hell yeah!
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Tuesday, March 3. 2009Gathering Core i7 temperatures with Linux![]() Debian’s standard kernel 2.6.26 has a little drawback: The coretemp module doesn’t recognize Intel’s Core i7 processor. The sensor chip W83667HG of my Asus P6T Deluxe (LGA 1366 socket) is not yet supported as well. This is a typical symptom when using Linux on too recent hardware. However, if it’s enough for you to read an aggregated CPU temperature instead of eight individual core temperatures, you can force loading the w83627ehf module with CODE: # modprobe w83627ehf force_id=0x8860 and tune the /etc/sensors3.conf to get rid of false alarms. Luckily, for the current prerelease 2.6.29-rc6 there’s a very recent bunch of patches available that brings support for W83667HG into the w83627ehf module, whereas coretemp already finds the CPU. Follow this guide on how to compile and install a new kernel the Debian way. A drawback is that source modules from the official Debian repositories might not compile anymore, e.g. the MadWifi modules. You have to get them from the project directly (via SVN). You also need to build a current version of lm-sensors (via SVN) to correctly gather the values from w83627ehf. You could then visualize the values e.g. with gkrellm. Now have fun stress-testing your system with MPrime. Update 03/24: It appears that these patches didn’t make it into the final 2.6.29 release. Update 04/09: The patches went into 2.6.30-rc1. Sunday, March 1. 2009Configuring Bluetooth on Linux 5ucks!![]() Because it’s a pain, a short reminder for myself on how to connect a Bluetooth capable cell phone with a Debian box:
In your cell’s Bluetooth settings you could now permanently authorize your PC. The next cat < /dev/rfcomm0 shouldn’t initiate a pin request anymore.
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