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today's leftovers

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Misc
  • 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

Finally: Historic Eudora email code goes open source

The source code to the Eudora email client is being released by the Computer History Museum, after five years of discussion with the IP owner, Qualcomm. The Mac software was well loved by early internet adopters and power users, with versions appearing for Palm, Newton and Windows. At one time, the brand was so synonymous with email that Lycos used Eudora to brand its own webmail service. As the Mountain View, California museum has noted, "It’s hard to overstate Eudora’s popularity in the mid-1990s." Read more Also: The Computer History Museum Just Made Eudora Open Source

Android Leftovers

Security Leftovers, Mostly 'Spectre' and 'Meltdown' Related

  • More Meltdown/Spectre Variants
  • Spectre V2 & Meltdown Linux Fixes Might Get Disabled For Atom N270 & Other In-Order CPUs
    There's a suggestion/proposal to disable the Spectre Variant Two and Meltdown mitigation by default with the Linux kernel for in-order CPUs. If you have an old netbook still in use or the other once popular devices powered by the Intel Atom N270 or other in-order processors, there may be some reprieve when upgrading kernels in the future to get the Spectre/Meltdown mitigation disabled by default since these CPUs aren't vulnerable to attack but having the mitigation in place can be costly performance-wise.
  • Linux 4.17 Lands Initial Spectre V4 "Speculative Store Bypass" For POWER CPUs
    Following yesterday's public disclosure of Spectre Variant Four, a.k.a. Speculative Store Bypass, the Intel/AMD mitigation work immediately landed while overnight the POWER CPU patch landed.
  • New Variant Of Spectre And Meltdown CPU Flaw Found; Fix Affects Performance
  • Ubuntu 18.04 LTS Gets First Kernel Update with Patch for Spectre Variant 4 Flaw
    Canonical released the first kernel security update for its Ubuntu 18.04 LTS (Bionic Beaver) operating system to fix a security issue that affects this release of Ubuntu and its derivatives. As you can imagine, the kernel security update patches the Ubuntu 18.04 LTS (Bionic Beaver) operating system against the recently disclosed Speculative Store Buffer Bypass (SSBB) side-channel vulnerability, also known as Spectre Variant 4 or CVE-2018-3639, which could let a local attacker expose sensitive information in vulnerable systems.
  • RHEL and CentOS Linux 7 Receive Mitigations for Spectre Variant 4 Vulnerability
    As promised earlier this week, Red Hat released software mitigations for all of its affected products against the recently disclosed Spectre Variant 4 security vulnerability that also affects its derivatives, including CentOS Linux. On May 21, 2018, security researchers from Google Project Zero and Microsoft Security Response Center have publicly disclosed two new variants of the industry-wide issue known as Spectre, variants 3a and 4. The latter, Spectre Variant 4, is identified as CVE-2018-3639 and appears to have an important security impact on any Linux-based operating system, including all of its Red Hat's products and its derivatives, such as CentOS Linux.

LXQt 0.13 Desktop Environment Officially Released, It's Coming to Lubuntu 18.10

For starters, all of LXQt's components are now ready to be built against the recently released Qt 5.11 application framework, and out-of-source-builds are now mandatory. LXQt 0.13.0 also disabled the menu-cached functionality, making it optional from now on in both the panel and runner, thus preventing memory leaks and avoiding any issues that may occur when shutting down or restarting LXQt. Read more