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today's leftovers

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  • Is it an upgrade, or a sidegrade?

    I went to a nearby store, looked at the offers... And, in part due to the attitude of the salesguy, I decided not to (installing Linux will void any warranty, WTF‽ In 2018‽). Came back home, and... My Acer works again!

  • How To Install KDE Plasma Mobile On Your Android Smartphone?

    New Linux-based mobile operating systems and hardware projects have been making numerous headlines in the recent months. Projects like postmarketOS, Plasma Mobile, Librem 5, etc., have managed to gain momentum and support of open source community.

    To give you a rough idea of how things are going on the Plasma Mobile land, its developers have shared two methods (Via: Softpedia) to test Plasma Mobile on an actual Android smartphone. In a previous post, they also shared virtual machine images of the OS.

  • A KDE Love Story: Translating Kalzium into Chinese

    When I was a high school student, chemistry was not my cup of tea. My grades in chemistry were not bad either, but I hated memorizing those organic compounds. Then, I decided to major in computer science at university, and from that moment, destiny tightly bonded me and Free and Open Source Software.

  • Last week in Kube
  • fwupd now tells you about known issues

    That one little URL for the user to click on is the result of a rule engine being added to the LVFS. Of course, firmware updates shouldn’t ever fail, but in the real world they do, because distros don’t create /boot/efi correctly (cough, Arch Linux) or just because some people are running old versions of efivar, a broken git snapshot of libfwupdate or because a vendor firmware updater doesn’t work with secure boot turned on (urgh). Of all the failures logged on the LVFS, 95% fall into about 3 or 4 different failure causes, and if we know hundreds of people are hitting an issue we already understand we can provide them with some help.

  • I love free software… and Gentoo does! #ilovefs

    Some people care if software is free of cost or if it has the best features, above everything else. I don’t. I care that I can legally inspect its inner workings, modify and share modified versions. That’s why I happily avoid macOS, Windows, Skype, Photoshop.

  • Multiplexing Input or Output on a Raspberry Pi Part 1: Shift Registers

    A Raspberry Pi doesn't have that many GPIO pins, and neither does an Arduino Uno. An Arduino Mega does, but buying a Mega to go between the Pi and the keyboard kind of misses the point of scavenging a $3 keyboard; I might as well just buy an I2C or MIDI keyboard. So I needed some sort of I/O multiplexer that would let me read 31 keys using a lot fewer pins.

    There are a bunch of different approaches to multiplexing. A lot of keyboards use a matrix approach, but that makes more sense when you're wiring up all the buttons from scratch, not starting with a pre-wired keyboard like this. The two approaches I'll discuss here are shift registers and multiplexer chips.

  • Fanless, Linux-friendly Kaby Lake mini-tower drives seven 4K displays

    Compulab’s rugged “Airtop2” mini-tower runs Linux Mint or Win 10 on a Xeon E3-1275 or Core i7-7700 CPU with optional Nvidia Quadro P4000 graphics plus up to 64GB DDR4, a 6-drive NVMe/SATA subsystem, up to 7x display ports, and optional M.2 and FACE modules.

More in Tux Machines

Best Audio Editors For Linux

You’ve got a lot of choices when it comes to audio editors for Linux. No matter whether you are a professional music producer or just learning to create awesome music, the audio editors will always come in handy. Well, for professional-grade usage, a DAW (Digital Audio Workstation) is always recommended. However, not everyone needs all the functionalities, so you should know about some of the most simple audio editors as well. In this article, we will talk about a couple of DAWs and basic audio editors which are available as free and open source solutions for Linux and (probably) for other operating systems. Read more

600 days of postmarketOS

postmarketOS is aiming for a ten year life-cycle for smartphones, see the all new front page for a short introduction if you are new around here. Today we'll cover what happened during the second half of 2018. Many have been wondering where we've been and why it took us so long to write a real update post. Is the project dead already? Weren't phone calls almost working? What happened? Development has been going on continuously, so we are not dead. Maybe a little undead though, like some of the old and forgotten phones we are trying to revive, because we have not really gotten any closer to the goal of getting telephony working or turning a phone into a daily driver. The Nexus 5, while booting mainline with accelerated graphics and connecting to the cellular modem all with a free software userspace, still does not have working audio. That is one example, other devices have different problems. However, we have not been sitting idle and doing nothing these past few months! Read more Also: Google hands out roses to preferred Android MDM vendors

Essential System Tools: Krusader – KDE file manager

This is the latest in our series of articles highlighting essential system tools. These are small, indispensable utilities, useful for system administrators as well as regular users of Linux based systems. The series examines both graphical and text based open source utilities. For this article, we’ll look at Krusader, a free and open source graphical file manager. For details of all tools in this series, please check the table at the summary page of this article. Krusader is an advanced, twin-panel (commander-style) file manager designed for KDE Plasma. Krusader also runs on other popular Linux desktop environments such as GNOME. Besides comprehensive file management features, Krusader is almost completely customizable, fast, seamlessly handles archives, and offers a huge feature set. Read more

Android Leftovers