LWDW 381: GoXLR on Linux, Rocky Red Hats, and dot matrix trucks?

Rocky and Alma react to the changes at Red Hat, Linux kernel 6.4 gets a P-State driver extension for AMD, GoXLR on Linux nears 1.0, and a pi-powered truck printer.


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00:00 Intro
01:06 $25 test bench
05:03 Rocky & Alma’s Red hat response
13:20 Linux kernel 6.4
18:26 GoXLR on Linux update
26:40 hoop
29:52 Dot matrix Pi

Rocky & Alma




  • Last week Red Hat tossed a wrench into the system. 
  • Red Hat will now only be releasing the source code for RHEL RPMs behind their customer portal.
  • A lot of people learned that the GPL allows that. 
  • Rocky remains confident they will be able to continue providing a bug-for-bug compatible and freely available alternative to Red Hat Enterprise Linux (RHEL), despite changes in accessibility.
  • They have come up with a way that abides by the licensing agreements but it’s a lot of manual work.  
  • Alma plans to continue but has not shared a roadmap.
  • As I have been doing research since this announcement by Red Hat, I realised that SUSE does subscriptions behind a customer portal too.
  • And Ubuntu Pro sources are not available to non-Pro customers.
  • So Red Hat is playing catch up.
  • The power of open source and its active community keeps the penguins marching on.
  • The free Red Hat Developer Subscription for Individuals is available to individuals, not organizations or teams, and is designed for personal servers, home labs, and small open source communities.
  • Am I happy with this move? No, I’m not… but I get it. 

Linux Kernel 6.4


  • Linus Torvalds announced the release of Linux Kernel 6.4 on Sunday.
  • And there are lots of updates and hardware enhancements for AMD and Intel CPUs, GPUs, and Arm SoCs in this latest Linux Kernel 6.4 release! 
  • Initial support for Apple M2 SoC which is used in the current MacBook Air, MacBook Pro, and Mac Mini systems.
  • And Wi-Fi support for Apple M1 Pro/Max devices.
  • AMD’s P-State driver extension, Guided Autonomous Mode, has been submitted to the Linux 6.4 kernel which will likely improve performance and power efficiency for AMD Ryzen and EPYC servers.
  • Linux 6.4 includes new power features for the Steam Deck via the updated AMDGPU kernel driver.
  • New Wi-Fi drivers for Realtek rtl8710bu, rtl8822bs, rtl8822cs & rtl8821cs.
  • And support for the Logitech G935 wireless 7.1 surround sound gaming headphones, which I love and use.
  • Rumble support for the latest Xbox controllers.
  • Support for the Lenovo Yoga Book X90F 2-in-1 tablet.
  • And new drivers for the ROG STRIX Z390-F GAMING motherboard.



  • Huge fan of reverse engineering and these lads are on it. 
  • The GoXLR App replacement for Linux, Windows and MacOS is exactly that. 
  • A tool to configure and control a TC-Helicon GoXLR or GoXLR Mini on Linux.
  • The latest release brings a few notable fixes. 
    • EQ Fine Tune is finally available in the UI
    • UI now has a basic visualisation of the device
    • Option to allow remote network access in the UI
    • And better sample handling. 
  • This is the largest ChangeLog to date.
  • Getting ready for a feature-freeze for the 1.0 release. 
  • Added an option to allow remote network access to the daemon via System Settings.
  • A LinuxGameCast shout-out too, thank you devs! 

Slice of Pi

Truck Dot Matrix



  • You have seen planes writing giant messages in the sky.
  • How about instead of skywriting, road writing?
  • Well a developer named Ryder Damen has somehow managed to create a giant dot matrix printer on land using his truck and a Raspberry Pi!
  • The printing process works by dropping splotches of water onto the road while the truck is driven.
  • The water is dropped carefully to shape letters and form custom messages.
  • Ryder uses a web interface in the cab of the truck which controls a series of hoses and valves.
  • Solenoids are used to release the water when directed by the Raspberry Pi.
  • The Raspberry Pi is responsible for running the web interface, accepting user input for new messages and sending the command to trigger the water-based printing system.
  • This is an awesome and unique project for sending fun messages to friends and family for special events.
  • And maybe Ryder could do a more permanent print using paint instead of water on a road or long driveway as an art project.
  • It is a little harder to get permission to do that though!
  • Nonetheless, this project, a Raspberry Pi truck dot matrix water printer, is a first if it’s kind, and Ryder could make money from it :-)

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