András Retzler ha7ilm

How to debug any (non-Qt) executable with QtCreator

Create .gdbinit in the same directory as executable, with the following contents:

set breakpoint pending on
b main

Run this:

How to compile and install Mixxx from source on Ubuntu 14.04?

You need to do this if you need the freshest version of Mixxx. However, it might have bugs. Consider installing the stable version from the repository.

First, clone the repo:

git clone https://github.com/mixxxdj/mixxx.git
cd mixxx

Next, install all of the dependencies detailed at:

I've broken the clips of my Thinkpad's aftermarket battery.

These clips hold the battery in the laptop. Without those, it can slide out, so the battery is not much useful. They were very weak indeed (probabily because the battery is not an original one, but I don't know because this is the only one I disassembled).

I've fixed it with some stick-on velcro (that has glue on its other side).

This should be very cheap, and you are likely to find it in the nearest fabric store.

The velcro seems to keep the battery in the laptop quite stable.

Custom battery module for polybar

I made this hack as the built-in battery module failed to display the battery status correctly after waking up from suspend.

[module/custom-battery]
type = custom/script
exec = acpi -b | cut -d' ' -f3-5 | sed 's/Unknown/Charging/g' | sed 's/^/  /'
tail = true
interval = 30

How to make formulas appear larger in Jupyter notebooks? Just add \Large to the beginning of the formula block.

E.g. $\Large \sigma$

JBL E55BT

I had a problem with my new bluetooth headphones JBL E55BT.

When connected to my Linux PC, there was an unacceptable background noise and I could hear the audio driver switch on and off even during silent periods inside music.

Solution: The headphones have a separate volume control, which can be adjusted with the buttons on the device. (This is not connected to the mixer volume on the PC.) By default, that was adjusted to maximum for some reason. Turning it down and adjusting a higher volume with Pulseaudio helped to reduce the noise to an acceptable level.

Match whole word in Google Docs search & replace

To match all the asdf enable regexp and type this in the search box: \basdf\b

	evdev:atkbd:dmi:bvn:bvr:bd:svnHewlett-Packard:pn:pvr
	evdev:atkbd:dmi:bvn:bvr:bd:svnHP:pn:pvr
	KEYBOARD_KEY_a0=mute
	KEYBOARD_KEY_ae=volumedown
	KEYBOARD_KEY_b0=volumeup
	KEYBOARD_KEY_90=previoussong
	KEYBOARD_KEY_99=nextsong
	KEYBOARD_KEY_a2=playpause
	KEYBOARD_KEY_81=f20

	% Copyright 2019 Andras Retzler <[email protected]>
	%
	% Permission is hereby granted, free of charge, to any person obtaining a copy of this software
	% and associated documentation files (the "Software"), to deal in the Software without restriction,
	% including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense,
	%and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so,
	% subject to the following conditions:
	%
	% The above copyright notice and this permission notice shall be included in all copies or substantial
	% portions of the Software.