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Issue

It seems that some HP laptops have a graphics issue with UEFI Native (Without CSM) mode and Debian.

• Debian Installation Screen Glitch - How to fix? : debian
• Unable to install Debian Stretch/Jessie on HP zbook 15 g2 : debian

Prerequisites

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I've searched for USB dongles which use Atheros AR9271 because some free GNU/Linux distribution communities recommend them. Open source firmware is available so that we can use them without binary blobs. The list below should be usable for those who respect freedom and privacy. It might be usable for those who want to connect Lego Mindstorm EV3 to wireless networks too.

Standard dongles

• TP-Link TL-WN722N
• Netgear WNA1100
• Tehnoetic TET-N150HGA (FSF-approved!)

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Introduction

eduMIP is a robotic platform developed by UCSD COORDINATED ROBOTICS LAB.

There is an article about eduMIP.

The kit includes (almost) everything to build a Mobile Inverted Pendulum. The only thing you'll need is a Beaglebone Black or its variants.

The design is open-source. CAD designs are available under the CC BY 4.0 License and software are available under the 3-Clause BSD License.

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## 出典: 
## 小林優. FPGAプログラミング大全 Xilinx編, 秀和システム, 2016. 
## ISBN: 978-4-7980-4753-9
## http://www.shuwasystem.co.jp/support/7980html/4753.html

## Nexys4 DDR constraints file
## chapter: ?
## project: ?????

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How to enable touchscreen scrolling in Firefox

Instructions

On Debian (As of 2018-05-11, Firefox 60/52ESR, Debian sid):

Add a line to .xsessionrc:

export MOZ_USE_XINPUT2=1

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If you installed opam on Fedora 28, you might be surprised the fact that you can't do opam switch 4.0x.x.

On Fedora 28, sudo dnf install opam installs opam 2.0 beta (as of 2018-06-02).

Official Blog says that there are some changes to be aware of, including:

opam switch create is now needed to create new switches

Therefore, what you want to do should be like this:

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Problem

For example, you installed OCaml 4.x.x compiler/environment via opam switch and tried to install graphics.

opam switch 4.x.x
# `opam switch create 4.x.x` if opam 2.0.0
eval `opam config env`
opam install graphics

You might encounter some errors like this.

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PostScript Core Font	URW Core35	TeX Gyre	Liberation	croscore	TypeKit	Bitstream
Helvetica	Nimbus Sans	TeX Gyre Heros	Liberation Sans	Arimo	Nimbus Sans	Swiss 721
Helvetica Condensed			Liberation Sans Narrow		Nimbus Sans Condensed	Swiss 721
Times	Nimbus Roman	TeX Gyre Termes	Liberation Serif	Tinos	Nimbus Roman	Dutch 801
Courier	Nimbus Mono	TeX Gyre Cursor	Liberation Mono	Cousine	Courier

| PostScript2 Core Font | URW Core35 | TeX Gyre | Liberation | croscore | TypeKit | Bitstream | |-------------------------|--------------|-------------------|------------------------|--------

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TeXLive 2018 on Windows 10 2018 October Update

TL;DR

If you can't compile your TeX document because of font not found, you should install your user fonts System Wide by right-clicking the font files and selecting Install for all users.

Explanation

From Windows 10 2018 October Update (1809), font files will be installed to %USERPROFILE%/AppData/Local/Microsoft/Windows/Fonts even if you copied your fonts to C:\Windows\fonts on Explorer.

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How to enter FEL mode on Lichee nano

If SPI flash isn't on the board, just remove the TF(microSD) card from the board and supply the power. It's the same if SPI flash is empty,

If your board have a SPI flash with preloaded image, pull D4(SPI CLK) down to GND. You can use the metal part of USB micro B or TF card slot as GND. Diagram is in the comment below. Thanks: @ernestp for the correction and providing a diagram.

Or you can use the special boot image [link]. Just write it to a TF card and boot.

Don't forget to remove the GND connection after entering FEL mode otherwise you will never be able to write the boot image to the SPI flash.