xrandr – treat multiple monitors as single screen

Many window managers such as xfce, gnome or kde have graphical utilities to help configure a multi monitor setup. However, almost none if any support configuring multiple monitors as a single screen. In the past technologies such as AMD eyefinity or Nvidia Mosaic enabled these features but they are vendor specific. Problems around Linux compatibility and using closed source drivers aside these technologies are relatively complicated to configure on Linux. An alternative to these vendor technologies is Xorg TwinView. Unfortunately TwinView requires a convoluted configuration procedure by writing Xorg config files. These configuration files are read during the start up […]

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Encrypted swap partition that enables upon boot with dm-crypt

Setup an encrypted swap partition that automatically gets unlocked and enabled upon boot. Normally setting up a secure swap outside a logical volume is not supported out of the box by most Linux distributions, these few lines of shellcode allow for quickly setting up an encrypted swap.

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Installing Manjaro 18 with Nvidia GTX 1050 TI

Manjaro its bleeding edge releases cause installation problems while using an GTX 1050 TI graphics card, these instructions allow Manjaro to install and successfully boot with an 1050 TI even if you are using Linux 4.16. Detailed instructions are provided for the unexperienced Linux users and a short step-by-step list is also available for the more seasoned veterans.

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manjaro grub add modeset

Simplified dm-crypt & btrfs disc creation

Most Linux users recognize the importance of data protection and security. Many of us will be familiar with encrypted partitions, almost all of the time these encrypted partitions will be managed, mounted and created with dm-crypt. A key or password will be used to decrypt the partition and mount the contents within. In an ideal world the data would be safe against many forms of unfortunate and maleficent intent. However traditional filesystems like Ext3, Ext4, NTFS, and HFS+ have a serious flaw. This flaw can lead to incorrect or damaged files being treated as undamaged and correct files. These filesystems fail to account for the physical phenomena known as bit-rot. Bit-rot is when bits on physical media or ssd’s flip from 0 to 1 or from 1 to 0 over time. In modern filesystems this is accounted for by creating checksums

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Btrfs logo

Installing Ubuntu on Acer Spin UEFI devices

Installing Ubuntu on the Acer Spin 1 has been proving to be quite the hassle to me. Fortunately; following these steps allows other to easily install Ubuntu on the Acer Spin 1 and possible many other Acer UEFI devices. Installing the bootloader will likely fail steps are provided to recover from this and perform bootloader repair. The steps require a 4gb usb drive for the Ubuntu live usb and later for installing rEFInd.

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Typical rEFInd boot splash screen with 2 possbile operating systems found

Short demonstration of raid10 with btrfs

Short demonstration of modern software raid options using btrfs. In this example raid10 is used to show what happens when a whole disc is lost. We use common btrfs commands to repare the raid10 architecture and as a result can see that no data is lost.

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btrfs raid10

Unreal Engine game development Linux pitfalls & resolutions

Unreal Engine its support for working and building for Linux is ‘lacking’ to say the least. Not only in the documentation about the tools that now have to be run manually from the commandline; generally what is and which features are not supported and common issues and resolutions are at least for Linux barely documented. So I will list some of the problems I have encountered and how to resolve them. Resolving all these problems will make creating a cross-platform game, using the UE4Editor on Linux and creating binary releases for distribution possible.

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Unreal Engine UE 2017

Cross platform video playback in unreal engine

The unreal engine supports Windows, Linux and Mac but each has its own different video player framework. If you try to have a simple single video player in Unreal this will likely only work for one or at most two platforms. By following this guide a video player can be made within Unreal engine that allows for playing back videos on Windows, Linux and Mac.

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Configure exim4 smtp relay to use tls on connect (smtps)

Exim has seen many changes over the years and is up to date on modern standards such as the use of STARTSSL. This however leads to problems when using other protocols or standards such as smtps otherwise known as tls on connect. In this guide we configure exim4 to use the smtps protocol with a remote smarthost configuration.

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exim 4 tty configuration screenshot