Open Hardware/3-D Printing
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Meltdown And Spectre Processor Vulnerabilities: Is It Time To Revive Open Source Alternative?
The beginning of the year 2018 brought new challenges in the form of Spectre and Meltdown vulnerabilities in most of the processor architectures. In layman terms, both of these vulnerabilities allow hackers to steal sensitive data like passwords. This vulnerability is applicable to Intel, AMD, and ARM. This means the problem is universal as it affects almost all devices ranging from embedded devices, smartphones, desktops, and servers to supercomputers.
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When the canary breaks the coal mine
Nobody likes it when kernels don't work and even less so when they are broken on a Friday afternoon. Yet that's what happened last Friday. This was particularly unsettling because at -rc8, the kernel is expected to be rock solid. An early reboot is particularly unsettling. Fortunately, the issue was at least bisected to a commit in the x86 tree. The bad commit changed code for an AMD specific feature but oddly the reboot was seen on non-AMD processors too.
It's easy to take debug logs for granted when you can get them. The kernel nominally has the ability for an 'early' printk but that still requires setup. If your kernel crashes before that, you need to start looking at other debug options (and your life choices). This was unfortunately one of those crashes. Standard x86 laptops don't have a nice JTAG interface for hardware assisted debugging. Debugging this particular crash was not particularly feasible beyond changing code and seeing if it booted.
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DIY Open-Source PantoProbe Precision Probe
Electronics enthusiasts, hobbyists and makers looking for a handy tool to help you troubleshoot their latest project, may be interested in an open source PantoProb created by Kurt Schaefer. As you can see from the image above the open source probe requires a few 3D printed parts as well as some off-the-shelf hardware which is easily sourced. Kurt has also provided full instructions and a Github repo with all the necessary files to make your very own 3D printed testing probe. Check out the video below to learn more.
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What the Apple 3D Printing Patents Mean for Our Industry
Recently Apple has been granted a patent for a color 3D printing idea whereby the printed object is first made and then colored in afterwards. This idea is a straightforward one; using it one could print an object using FDM for example and then later color it with an inkjet print head. This method would play to both technologies’ strengths with FDM making for strong objects that are very dimensionally accurate but often suffer from poor surface quality. By having a separate print head then color in and, more importantly perhaps, strengthen and smooth over the object as well as add things such as conductivity, the resulting object would look nice as well. This could be a potential breakthrough in expanding 3D printing.
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Dilution and Misuse of the "Linux" Brand
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