Categories
Linux Mastering Development

Why the USB serial port or openocd won’t open without root permission?

minicom or openocd command won’t run without root permission on a Ubuntu 16.04 system. In the past, I was able to open serial port without root permission. I verified that the current user exist in dialout and plugdev groups. Also, I don’t know if it matters but since this looks like a USB issue, I […]

Categories
Linux Mastering Development

Why the USB serial port or openocd won’t open without root permission?

minicom or openocd command won’t run without root permission on a Ubuntu 16.04 system. In the past, I was able to open serial port without root permission. I verified that the current user exist in dialout and plugdev groups. Also, I don’t know if it matters but since this looks like a USB issue, I […]

Categories
Mastering Development Software

What is the minimal app that can do maximum physical damage to the computer (and possibly the user)?

First of all, this is a purely theoretical question so don’t try this at home! Backstory: I once had a pretty nasty incident with a buggy software synth that damaged my ear. It suddenly sent what sounded like random-ish data to the right channel in the headphones, very loud (and added some echo and reverb […]

Categories
Linux Mastering Development Ubuntu

System tray tweaking – restrict to single monitor, change font, multiple lines?

This is for an Ubuntu 16.04 LTS system. I know you can change the launcher to be restricted to one monitor, instead of a second or third monitor. The issue is that if a monitor is in portrait mode, and you have too many elements in it (i.e. battery status, Bluetooth, date/time in long format), […]

Categories
Linux Mastering Development Ubuntu

How to separate system icons in top bar

I would like to separate the system icons in the top bar, that is wifi, bluetooth, sound and battery, to have 4 different clickable icons. I saw this extension https://extensions.gnome.org/extension/1201/extend-panel-menu/, but it doesn’t work in Ubuntu 19.10. I have other extensions installed, so I know how to set them, and I’m sure I did nothing […]

Categories
Ask Engineering

How to choose a 50 Ohm RF attenuator for radio, bluetooth and wifi power measurements

I have built a power meter with AD8318, a chip which contains a logarithmic amplifier, often used for power measurements. I have read its datasheet and it is written that the maximum input power is equal to 12 dBm. I do not know exactly which kind of measures I can do with this limits, but […]

Categories
Linux Mastering Development

If Linux runs well on a laptop, will BSD run too?

Is it a safe bet to assume that if Linux runs well (boot parameters not needed, everything (wifi, bluetooth, etc) works) in a laptop, BSD will run well too?

Categories
Linux Mastering Development Ubuntu

Ubuntu 18.04 Bluetooth

I have an ubuntu 18.04 that has a “ASUS PCE-AC55BT B1 AC1200 Wireless Bluetooth 4.2 PCIe/Mpcie Adapter.” The wifi and bluetooth were working fine for a couple months, but recently the bluetooth has broken (the wifi still works). I am pretty sure I have tried every result on the first 3 pages of Google when […]

Categories
User Help

USB Ports fail to work

Machine: HP Pavilion 15″ (2015) [Laptop] OS: Manjaro Linux Issue (very shortly summarized): USB Ports do not work. How did this happen?: I plugged in a malfunctioning a cheap USB WiFi adapter (originally for my Raspberry Pi 2, it stopped working on it, so decided to plug it into my laptop to see what’s up). […]

Categories
User Help

How to Make Things Work on a Constantly Compromised Network?

I have a theoretical question for everyone. Say there is a network that is constantly under attack. The users of the network would like to be able to do things like browse the internet with JS enabled and have dual-screen/sound/graphics working. Anyway, anything is possible — BIOS hacked, Bluetooth, WiFi, etc. Is there some way […]