ha7ilm

This is normally in .Xresources:

$ cat .Xresources 
Xft.dpi: 130

To change it on the fly:

ha7ilm

Problem

error: undefined symbol: _ZdlPvm, version Qt_5"

Solution

You did run ./coppeliaSim. Run ./coppeliaSim.sh instead.

ha7ilm

#!/bin/sh
rm /tmp/cliprect.png
ssh user@example.com "DISPLAY=:0 xclip -selection clipboard -t image/png -o -" > /tmp/cliprect.png
if [ $? -eq 1 ]; then
    notify-send -t 10000 "failed getting png from remote machine"
else
    xclip -selection clipboard -t image/png -i /tmp/cliprect.png
fi

ha7ilm

xsetwacom set "Wacom Intuos BT S Pad pad" Button 8 <something>

For some reason, button #4 is actually Button 8. It turned out from xev output.

ha7ilm

Building Inkscape from source on Ubuntu 20.04.2 LTS

sudo apt install libdouble-conversion-dev libpotrace-dev libgtkmm-3.0-dev libpoppler-dev libpoppler-private-dev libpoppler-glib-dev
git clone https://gitlab.com/inkscape/inkscape/
cd inkscape
mkdir build
cd build
cmake -DCMAKE_INSTALL_PREFIX=/home/$USER/a_sensible_install_directory/inkscape_install ..
make -j6

ha7ilm

How to open a Stylus Labs Write .svgz file with Inkscape?

cat something.svgz | gunzip | inkscape -

ha7ilm

I was getting the following error message while trying to run Viber on Ubuntu:

Failed to create OpenGL context for format QSurfaceFormat(version 2.0, options QFlags<QSurfaceFormat::FormatOption>(), depthBufferSize 24, redBufferSize -1, greenBufferSize -1, blueBufferSize -1, alphaBufferSize 8, stencilBufferSize 8, samples -1, swapBehavior QSurfaceFormat::DoubleBuffer, swapInterval 1, colorSpace QSurfaceFormat::DefaultColorSpace, profile  QSurfaceFormat::NoProfile) 
[1]    929803 abort (core dumped)  /opt/viber/Viber

Solved by running:

ha7ilm

Match whole word in Google Docs search & replace

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

ha7ilm

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.

ha7ilm

bindsym $mod+u exec i3-input -F "rename workspace to \"$(i3-msg -t get_workspaces | jq -r \"map(select(.focused))[0].num\"):%s\"" -P 'New name for this workspace: '