[Solved] Manjaro Linux: Cannot connect Bluetooth headset

TL; DR: 1. sudo pacman -S pulseaudio-bluetooth
2. sudo nano /etc/bluetooth/main.conf
3. Add «Enable=Source,Sink,Media,Socket» in [General] section
4. pulseaudio -k

Long version:
I recently stuck on connecting my Trakz Titanium Bluetooth headset in Manjaro Linux (kernel version 5.8.18-1). I saw it in the list of Bluetooth devices to connect, but nothing happened if I set the connection on. Needless to say that there was no option to choose a headset in the list of sound devices.

I had to spend some time reading docs, installing packages, and playing with conf files, and finally found the reason, so hopefully, this article saves you from this tedious journey.

— So here is the how to fix this.

Turn on a dark theme for most of the popular web-sites

TL; DR: Enable flag #enable-force-dark in Chrome.

I’m a big fan of dark themes for websites and apps. They make browsing more comfortable to my eyes, especially after a long day and during the night. Unfortunately, there are still lots of sites (including the most popular ones) that offer only the default «white background» style which makes using them eye-leaking.

Until today, I used the Stylus plugin for my browser which has a comprehensive library of themes that applies over the top of the default website style. It worked for me, although I still had to write my own styles for some unpopular sites, another issue was that styles from the community-developed library were often outdated.

Fortunately, developers of Chrome browser recently solved that issue for us, so that you can easily turn on (and off) the dark theme for most of the sites, also you don’t need any plugins anymore.

To enable dark themes:

  1. Type chrome://flags/ URL in Chrome browser address bar
  2. Search for #enable-force-dark (Force Dark Mode for Web Contents) setting and Enable it (you may play with different modes if you faced performance issues, but to me simple «Enabled» option works just fine).

That’s it! Open your favourite website on the browser and check it out.

In fact, it works even on this site 🙂

Go meetup в формате full-online от GDG Golang Kazan и Yoshkar-Ola

Когда: 30 мая 16:00–19:30 (MSK)

Список докладов:

1) Тестирование (микро)сервисов — Алексей Палажченко, Percona
Алексей Палажченко (кто это вообще такой?) расскажет про плюсы, минусы и подводные камни тестирования сервисной, микросервисной и наносервисной архитектуры прямо на продакшене: что делать с аутентификацией и авторизацией, что делать со стейтом, и как вообще не завалить прод.

2) Dependency Inversion Principle (DIP) and Dependency Injection (in Go) — Антон Кучеров, toogle
— разберем что такое DIP, а что такое DI;
— попытаемся понять какие проблемы могут быть решены с помощью этих понятий;
— разберем рад вариантов реализации DI в Go.

+2 доклада, возможно, будет анонсировано позже.

Регистрируемся по ссылке https://golang-yola.timepad.ru/event/1317897/

Online meetup about «Data Science and Machine Learning» from Piano.io team

When: 4 June 18:30-20:30 (MSK)


  •  Дмитрий Каштанов  — Senior ML Specialist, г. Казань
    «F1 Score и философский камень: численная алхимия XXI века»
  • Елена Волкова — Data Scientist, г. Осло
    «Про многоруких бандитов» (reinforcement learning vs. А/В testing)
  • Тим Чайников — Lead Developer, г. Самара
    «Пусть говорят, или что можно сделать с гигабайтами видео контента»
  • Arne Sund — Lead Data Scientist, г. Осло
    «Large-Scale User Similarity Modeling»

Reserve your free place at https://piano.timepad.ru/event/1317141/

Webinar «Empowering Remote Teams to Collaborate and Innovate in Times of Change» by Akvelon

The above-titled webinar will be taking place on June 24th, 2020 at 11am PST!

Join Joshua Hoffman (Director of Modern Workplace Solutions — Microsoft), Lee R. (VP of Marketing — Limeade), Romi Mahajan (Chief Marketing and Revenue Officer — Quantarium), and Mark Boyes (VP of Growth — Akvelon, Inc..) as they discuss best practices for leaders to empower their remote teams to consolidate, innovate, grow, and thrive in a time of enormous change and disruption.

Register now to save your seat: https://lnkd.in/gsU52ER

Hacktoberfest 2019 — go and contribute to open source

Hacktoberfest is an initiative from Digital Ocean and it’s intended to invite anyone to go and contribute to open source, even it’s your first commit or pull request. Any help to OSS community would be appreciated these days.

Whether you’re a developer, student learning to code, event host, or company of any size, you can help drive growth of open source and make positive contributions to an ever-growing community. All backgrounds and skill levels are encouraged to complete the challenge.

  • Hacktoberfest is open to everyone in our global community!
  • Pull requests can be made in any GitHub-hosted repositories/projects.
  • Sign up anytime between October 1 and October 31.

Oh, and last but not least. Everyone can get a free nicely looking t-shirt from Digital Ocean for just 4 approved PR’s.

Check official website for more info: https://hacktoberfest.digitalocean.com/

Hint. To find suitable issues to fix, search them with #hacktoberfest label.

Certification for Software Test Engineers

There are recognized ‘brands’ of certification authorities that may you offer proof of your knowledge, for example ISTQB/BCS (former ISEB). They have many different levels and often employers may state they desire at least Foundation level certificate from job seekers.

Nonetheless, there are another provides, yet your local Software Testing Qualification Board or community may have different programms.

I have collected links to the most known certification authorities and local boards. Hope, this can be helpful someone.

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Linux: No network connection. Turn network adapter on.

I’ve got this issue recently when installed VirtualBox on my Manjaro Linux (this distro based on Arch Linux, so the solution would work there as well).

It seems that VirtualBox, while installing its virtual network adapters, had messed up the existing physical ones. That led to the situation when, once you reboot your machine, there is no network connection to the internet.

➜ ~ ping google.com
ping: google.com: Name or service not known

Well, this is pretty easy to fix.
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