Sam Pfeiffer awesomebytes

Some other tips

I followed: https://etiennemueller.github.io/razer-blade-data-science/

Basically to fix the suspend loop with:

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash button.lid_init_state=open"

Make Wifi AX210 card work (with bluetooth)

How to install Ubuntu 18.04.05 on Alienware 15 R3 (year 2020 edition)

Let windows install

Just next, next, next filling up your data.

I needed to shutdown the machine on a screen that seemed stuck forever. After starting again it all worked normally and got into Windows.

I found the Dell update application and installed all available updates (as I will probably never boot into Windows again).

Shrink the disk

rosrun topic_tools transform /h5/thruster_manager/put_stamped /h5/thruster_manager/input_stamped_base_link geometry_msgs/WrenchStamped 'geometry_msgs.msg.WrenchStamped(header=std_msgs.msg.Header(seq=0,stamp=rospy.Time.now(),frame_id="base_link"), wrench=m.wrench)' --import std_msgs geometry_msgs rospy

Ipython tricks

Here I'll describe some ipython tricks to make developing or exploring bugs easier.

First: What is ipython? It's an interactive Python terminal with colours, autocompletion and some additional magic.

Install it with: sudo pip install --upgrade ipython

Autocompletion

Just press TAB to autocomplete almost anything, imports, functions, methods...

How to get the type of a variable in C++

#include <boost/units/detail/utility.hpp>
using boost::units::detail::demangle;
auto demangled_name = demangle(typeid(MY_VARIABLE).name());
std::cout << "variable is of type: '"<< demangled_name << "'" << std::endl;

ssh -X Qt OpenGL error solution

To avoid the following error: QXcbIntegration: Cannot create platform OpenGL context, neither GLX nor EGL are enabled when doing X forwarding via SSH one needs to install the following (in the remote machine where you are sshing into). This also solves black screen for me.

# This is needed in the remote machine
sudo apt-get install libegl-mesa0 libglx-mesa0

Using the Qt serialbus (to access a CAN bus) in Ubuntu 18.04

I was trying to compile a Qt project that uses the Qt serialbus module and it was not configuring when using qmake, the error was: Unknown module(s) in QT: serialbus. So I needed to build qtserialbus myself.

While trying to build it I ran into: fatal error: private/qobject_p.h: No such file or directory.

# Overkill: get all qt-stuff
sudo apt install qml-module-qt-labs-folderlistmodel qml-module-qtquick-extras qml-module-qtquick-controls2 qt5-default libqt5quickcontrols2-5 qtquickcontrols2-5-dev qtcreator qtcreator-doc libqt5serialport5-dev build-essential qml-module-qt3d qt3d5-dev qtdeclarative5-dev qtconnectivity5-dev qtmultimedia5-dev

	#!/usr/bin/env python
	# To make Python 2.7 print an actual function
	from __future__ import print_function
	import subprocess
	# shlex takes care of splitting a string representing a command in words for subprocess
	import shlex
	import os


	class RealTimeProgramOutputParser(object):

	def get_window_id_by_pid(pid):
	"""
	Get the window ID based on the PID of the process, None if not found.
	Uses wmctrl and parses it output to find it
	"""
	from subprocess import check_output
	# Looks like:
	# 0x03c00041 0 3498 skipper Mozilla Firefox
	# WindowID ? PID USER Window Name
	# Needs sudo apt-get install wmctrl -lp

	#!/usr/bin/env bash

	# Template from https://betterdev.blog/minimal-safe-bash-script-template/

	set -Eeuo pipefail

	cd "$(dirname "${BASH_SOURCE[0]}")" >/dev/null 2>&1

	trap cleanup SIGINT SIGTERM ERR EXIT