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Tagged With: ubuntu

Worst customer experience ever

The best notebook ever I blogged about my attempts to buy a decent notebook here before. But let’s recap quickly. In the fall of 2013 I bought a Dell XPS13 Developer edition. When Dell shortly thereafter announced that they now accept BitCoin, I had the feeling I missed out on that opportunity. Nevertheless, it was … Continue reading »

Categories: BitCoin, Software | Tags: , , , , | 3 Comments

let’s encrypt

I never bought a commercial grade SSL certificate for my private website, but I used free ones before. Usually from startssl. While it worked, the process was cumbersome. And then when I wanted to renew, my browser showed a warning that their own certificate was out of order. When the letsencrypt initiative (supported by mozilla … Continue reading »

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Verifying downloads

Last week I stumbled across a post from last year, where somebody described how it was impossible to download an important infrastructure program securely on Windows. My first reaction was of course to pity the poor souls that are still stuck with Windows. How easy is it to just type apt-get install and have all … Continue reading »

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ubuntu phone will be great, but it is not yet

The BQ Aquaris ubuntu phone that I waited for so eagerly was delivered today. Full of anticipation I unpacked it and switched it on. After playing with it for a while the excitement turned into dissatisfaction. I hate to say it, but on a phone the solid base and polished user experience is not enough, … Continue reading »

Categories: Software | Tags: , , | 2 Comments

an ultrabook for developers

My old netbook still runs, but it shows signs of senility. I have been thinking of a replacement for a while, but as it still worked, that was constantly postponed. When I first read about project sputnik, I thought this is great news and I want one. The device that followed looked very nice, but … Continue reading »

Categories: Software, Uncategorized | Tags: , , , , | 2 Comments

OpenCL First Steps

There is an increasing noise about GPGPU computing and how much faster than CPU (even parallel) it is. If you didn’t hear about all that, GPGPU is about using the computer’s graphics card(s) to do general purpose computations. The key to the performance lies in the parallel architecture of these devices. From what I read, … Continue reading »

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packaging libboost compiled with llvm clang

I read many articles and posts over the last year or so, citing how great llvm clang is. On one side it shall have a static checker that makes lint redundant, and on the other side the optimizer has an -o4 where the -o3 shall be comparable to other optimizers. On top of that, compilation … Continue reading »

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Screen went black

This morning, I had a short moment of horror when I turned on my Netbook. After the ubuntu splash screen, it went black and didn’t respond to any keys. The only response was for the power key, where it displayed the ubuntu splash screen again and shut down. My Acer aspire one has the dreaded … Continue reading »

Categories: Software | Tags: , , , | 1 Comment

Robot Arm part 1 packaging and simple manipulation

Another project that I had in mind for a while was to experiment with robot arm path planning and inverse kinematics. If you don’t know what that is, think about how robot arms could be programmed. The simplest form would be capture and replay, in which you have a controller which which you record how … Continue reading »

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Mixing boost versions –as-needed

Some linux distributions defaulted to use the –as-needed linker flag for a while. Ubuntu tried it in natty, but then reverted. Now with oneiric, it really is enabled by default. I ran into this when one of my packages wouldn’t compile on oneiric. I always got linker errors with boost::filesystem and boost::system. Between natty and … Continue reading »

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