I've started to look into getting a 3D printer mainly for printing minis and terrain for TTRPGs. For the aficionado and print quality the best printer type seem to be resin based printers, but I don't think I'd be able to deal with the toxic fumes in a safe manner. As such I've settled on looking at filament based printers and I don't really need super high fidelity prints.

I need one that works well with Linux and preferably OSS. I am willing to pay for closed source software (or OSS) if it runs on well on Linux. So if you know of any software that is easy to get started with I'd be happy to hear about it. If you know of any models or makes that I should avoid I'd also appreciate a heads up!

Any other advice for someone just getting started with 3D printing?

I wanted some help with a homelab server I am in the beginning stages of designing. I am looking for a flexible and scalable media and cloud system for home use, and I thought this community would be a good place to source feedback and recommendations before taking any real next steps! I really want to check that I am approaching the architecture correctly and not making any bad assumptions. I am open to all feedback, so please let me know what you think!
I already run a simple home server and I have typical homelab FOSS apps, such as jellyfin, navidrome and audiobookshelf, but I am also interested in migrating away from cloud storage using nextcloud, immich, etc. In an ideal world, this setup would also allow me to leave windows on my main machine and use a windows vm for business related work that can’t be done on Linux. I will likely be the one primarily using the services, however I could expect up to 10 - 20 users eventually.

High level setup is with two machines:

• Proxmox Server
• TrueNAS Scale server
  • JBOD with either 90 bay or 45 bay storage
• 10G switch

This might be a stupid setup right off the bat, which is why I wanted to discuss it with you all! I have read a ton about using TrueNAS as a WM within Proxmox, but I just like the idea of different machines handling different tasks. The idea here would be to set up the TrueNAS server so it can be optimized for managing the storage pool to allow for easy growth. While the Proxmox server can handle all the VMs and connecting users, with higher IO, etc.

TrueNAS System Specs:

• AMD ryzen CPU and motherboard
• 64 or 128GB ram
• Mirror 500GB M.2 NVMe OS Drives
• GPU if necessary, but hopefully not needed
• Dual 10gb pcie card if the motherboard doesnt already come with them
• An hba for the JBOD something like the LSI SAS 9305-16e
• SLOG and L2ARC as necessary?

JBOD enclosure

• While I am interested in a 90-bay enclosure, I would only realistically be starting with two vdevs which is why I think a 45 bay enclosure wouldn’t be an issue.
• Im tentatively planning for an 11 wide Raidz2 vdev configuration. This would hopefully scale to 8 vdevs with 2 hot spares or 4 vdevs with 1 hot spare.
• All drives would be HDDs

Proxmox Server Specs:

I am less familiar with the specs I will need for a good Proxmox server, but here is what I am thinking.

• AMD epyc and motherboard if I can get my hands on a less expensive one. Otherwise I was thinking a higher end AMD ryzen cpu
• 128 or 256GB ram
• Mirror 500GB M.2 NVMe OS Drives
• Somewhere between 2 and 8 TBs of SSD storage. Depending on the number of drives, I think this would be a single drive, mirror or raidz1.
  • This storage will be used for all the vm configuration and storage, except for something like Nextcloud where the main storage will go onto the TrueNAS mount.
  • I would also use this for temporal storage such as downloading a file before transferring it to the TrueNAS mount.
• A dedicated GPU primarily for transcoding media streams, but also for testing and experimenting with different AI models.
• Dual 10gb pcie card

Questions:

• I know Proxmox can do zfs right out of the box so I know I don’t need the TrueNAS server, but splitting it this way just seems more flexible. Is this a realistic setup or would it just be better to let Proxmox do everything?
  • Does anyone have experience creating NFS shares in TrueNAS for mounting in Proxmox? I would be interested in thoughts on performance, and stability among any other insights.
• Do any of the system specs I listed seem out of line? Where and how do you think things should be scaled up or down?
• If I ever did expand to a second JBOD shelf, assuming the first one was full first, is it be possible to create new vdevs that spanned across the shelfs without losing data?
• Is SLOG and/or L2ARC necessary for this setup? What capacity and configuration would be best?
• What else have I missed?

Lastly, a quick blurb:

I have been building PCs for a while and undertook building a home server a few years ago. I loved the experience of learning Linux (the server is running Ubuntu), picking up docker, and learning more about the FOSS community has been a joy! Part of this project is to learn along the way but also have a setup that I can build towards over time! Proxmox, TrueNAS and zfs would all be new to me so I really see it as an opportunity to explore. I want a solid media and cloud server setup, while also giving myself the freedom to explore new operating systems and general hypervisor functionality.

I'm info dumping some links about open-source robotics. The rabbit hole runs deep and this barely scratches the surface.

Disclaimer: I haven't tried any of these yet. Based on a cursory search and following links from the great Open-source robotics Wikipedia page.

Robotics simulation on Godot

• https://github.com/flynneva/godot_ros - Proof-of-concept integrating ROS2 (Robot Operating System) with Godot, for a 3D robot simulation environment. (Updated 8 months ago)

• https://github.com/nordstream3/Godot-4-ROS2-integration - A fork(?) of the above. The readme is clearer with visual examples of what it's meant for. (Updated 12 months ago)

• https://github.com/plaans/gobot-sim - A top-down 2D factory simulation of packages being processed by machines. (Updated 3 months ago)

• https://lab.nexedi.com/nexedi/godot-modbus-demo - Exposing a modbus interface to control simulated industrial components. (Updated 5 years ago.) Comes with a blog post which might be more recent (a year ago?).

• https://arxiv.org/abs/2412.18408 - "Exploring Flexible Scenario Generation in Godot Simulator" about generating simulated physical scenes for testing computer-controlled cars. Write-up only with no code. (Submitted 9 months ago)

Robotic car simulation on Unreal Engine and Unity

• https://github.com/carla-simulator/carla - "CARLA is an open-source simulator for autonomous driving research." They mostly target Unreal Engine. Regularly updated and popular with 13k stars on GitHub.

• https://github.com/microsoft/AirSim - Microsoft and IAMAI collaborated (plus DARPA funding?) to create an open source simulation platform for both flying drones and autonomous cars. Targets Unreal Engine and experimentally Unity also. Soon being sunset and replaced with a new project confusingly named "Project AirSim."

• https://github.com/iamaisim/ProjectAirSim - The successor to AirSim. The GitHub shows it's only at version 0.1.1 though.

Robot Operating System (ROS2)

• https://github.com/ros2/ros2

• https://docs.ros.org/en/kilted/Tutorials.html - Tutorials beginning with TurtleSim, a top-down 2D turtle scene where you control turtles. Looks like ROS2 uses familiar network messaging patterns like Publish-Subscribe.

• https://vimeo.com/osrfoundation/videos/sort:date - Presentation videos. Looks like the Open Robotics foundation just completed a developers' conference in Japan two days ago. The presentations from ROSCon JP are Japanese-language-only. Next one is coming very soon this October in Singapore.

How to get started?

That's a lot of links. I'd first figure out what I want to do. Humanoid robots seem popular lately—like the Berkeley 3d printed robot—so it'd be interesting to start there, although it doesn't map cleanly onto the projects I linked. So maybe if I imagined a robot with a human torso and arms, but with wheels and car-like locomotion. Then I could use a combination of the car simulators and probably ROS2 to deal with the upper body components? Or maybe there is another solution for the torso and arms that is a more direct fit than ROS2? Maybe iRobot/Roomba has a better solution for the car-like locomotion at this small scale?

Anyone used these before and have a story to share? Anyone curious to try one out and report back? I plan to, but no idea on my schedule.

I'm wanting to automate a thing on my android phone.

I would like to activate and deactivate alarms based on calendar events (by keywords in their name or description).

This isn’t really meant to be a hate post or “linux sucks” kind of thing, in fact I like Linux (EndeavourOS being my distro of choice). This post is more about the little things that nobody really talks about when comparing OS’s, but then you face them and they can be a dealbreaker or a pain in the neck.

This weekend I decided to try running CachyOS in my gaming desktop. For quick context, my desktop is dedicated to gaming, everything else I do on my laptop. The desktop is plugged to a 1080p 60hz monitor and a 4k 120hz TV (hz relevant for later), uses sunshine for streaming, and also Virtual Desktop for my meta quest.

So, I grab the USB and plug it into the PC. Turn it on and here comes the first issue: the background image appears and nothing else.

Well, my first suspicion due to a similar issue I had with ubuntu a decade ago, must be the Nvidia GPU causing issues. Without investigating further, I restarted the PC and used the legacy mode. The resolution was extremely low in my monitor, but it was manageable. Installed the thing and restarted.

Once the PC is back on, the login screen appears. I input the pass, enter and…. Exact same issue. Background image, no UI whatsoever.

I spent an embarrassing amount of time here, investigating the error. Checking the drivers, etc.

But long story short: the actual problem was that my monitor was the second screen, the TV was the primary. The desktop was outputting to both screens. The UI was on the TV.

I curse myself for not remembering that this may have been it, but in my defense:
1- the terminal commands that appear when turning on the OS appeared in my monitor
2- the legacy mode worked on my monitor
3- on windows, the OS is smart enough to figure out which screen is turned on, so I was used to it automatically outputting to the correct screen

Well, once I fixed that, here came the second (small) issue:
Scaling is broken.

Windows used to have this problem but nowadays, when you change screen Windows does a good job scaling things, despite some issues with some apps. At the very least, you won’t get blurry windows.

On KDE… Yeah. Blurry all around. I don’t have a habit of swapping screens mid session, so I could live with it.

Then came the third issue:
KDE is limited by the lower highest possible framerate in both screens. Meaning, on my TV, I was stuck with the 60hz because of my monitor

From what I found out, this is not exclusive to KDE and seems to be a problem with Nvidia. Regardless, for me it was a dealbreaker. In my case, Windows can use the respective framerate of each screen, while Linux can’t.

As I said, this is where I threw the towel and went back to windows. Which is really a pity because I really don’t like where Windows 11 is going, but it’s something I can live with as long it doesn’t get in the way between me and gaming.

Meanwhile Linux, because of these little things, introduced more issues than rewards for my use case, thus why I can’t jump to it on my desktop.

I need you to do me a favor: please keep an open mind and reserve judgement until after you've thoroughly digested the ideas I'm presenting here. These are not my ideas, and I have no connection to this project. I hope to do them justice in representing them accurately and as clearly as I understand it all.

Please don't be dismissive. Please don't jump to conclusions. I would not be posting about this if I did not believe it has tremendous potential to reshape the digital economy, and therefore everything that governs how civilization progresses in the next century. Dramatic, much? Yes, but I hope I have your attention.

I'm not posting this as a plain link, because the website looks incredibly sus. Just trust me for a few minutes. Links are at the end.

(No generative AI was used to write this post.)

What is PrizeForge?

PrizeForge is a financial service that can be best thought of as "Representative Crowdfunding" (my term, not theirs). Like direct crowdfunding (e.g. Kickstarter), it lets people pool their money to support expensive projects that would otherwise be impossible to fund. Similar to Patreon, it can also be an effective tip jar for much smaller things that would otherwise go unrewarded.

The innovation is two-fold: first, contributors never move alone. As a contributor, you set a ceiling on your weekly payment. This is the "enrollment" amount. However, the actual amount of money disbursed each weekly cycle is the amount that is successfully "matched" with other contributors. In the simplest example, if I wanted to enroll for Tildes at $20/week, and one other user enrolled at $5/week, the disbursement would be the sum of the matched funds: $5 + $5. In this way, nobody ever pays an unfair proportion of the total, and small donations become an integral part of funding allocation. Additionally, like how philanthrophists often match charitable donations to meet a fundraising objective, matching provides a powerful incentive for individuals to contribute by making individual contributions feel more significant, since any money you part with can be doubled by another contributor. The more you put in, the more others will too. (PrizeForge calls this algorithm "Elastic Fund Matching". The full algorithm gets considerably more complex, but they have a neat visualization on their site and videos.)

Second, unlike existing crowdfunding and patronage systems, creators and companies do not receive fund disbursements directly. Rather, representatives ("Delegates") send the money to the people and organizations that should receive funds to deliver value to the stream's contributors.

"Won't delegates just siphon funds to themselves?" you ask. Well, yes, that will 100% happen at some point. Corruption is a human problem that can't be solved with technology alone. PrizeForge aims to provide mechanisms to allow the community to be very dynamic, so contributors can easily switch to a new representative—for any reason. Additionally, tools for transparency in how the money moves would go a long way in keeping delegates accountable.

In the context of open-source software, delegates should be experienced power users who are well equipped to evaluate features and bugfixes, and then can award the prizes to developers according to their best judgement.

The use of a representative has many advantages over direct crowdfunding. Someone highly invested in a software product has valuable experience and would be more effective at setting priorities for features and bugfixes. An experienced and trusted delegate would save developers time having to parse the requests (...demands?) of individual users who may not be able to articulate what they really want. Also, if a developer or company stops doing what people want (providing value to the people who care), then funds can flow to competing alternatives in a very granular and dynamic way, as the delegates shift funding and/or new delegates arise.

If we could pick a delegate here for Tildes, would anybody really object to @cfabbro?

These trusted delegates already exist, everywhere! We just haven't been able to cooperate in the right ways to delegate our individual power, so they can truly move the needle on funding the projects we care about. PrizeForge is, I believe, the first truly sustainable funding model for community-owned and directed open-source.

Addendum

Watch this video first! Before you get scared away by the terrible scammy-looking website: https://www.youtube.com/watch?v=SO46oEdlkY8

The FAQ: https://prizeforge.com/faq

The company's github page: https://github.com/positron-solutions

Looks like just two people, with Psionikus doing all the promotion and running accounts. The company is incorporated in South Korea. They've got a bunch of emacs tooling, and I believe the PrizeForge concept originated out of a desire to improve the funding/development process of emacs, then the lem editor. They also apparently have a bit of beef with the FSF due to emacs politcs. Check out the last FAQ for a fun easter egg.

The sub-reddit: https://old.reddit.com/r/PrizeForge/

The Hacker News comment that took me down the rabbithole: https://news.ycombinator.com/item?id=45036360

Bonus thoughts:

• What's really crazy is that this is not a crypto or blockchain project. You can do a simplified version of the elastic fund matching with just money, pen & paper.
• This financing scheme is basically an idealized utopian voluntary tax system. I can imagine a granular delegate system being extremely effective at making politics incredibly boring. Imagine electing a local representative only to have potholes fixed in your area, using only the funds earmarked for fixing potholes. It would be so much simpler to keep them accountable. Either the roads are crap or they aren't! Where's the money, bub?! Why've you got a fancy new lawnmower?! I want my $2 back!
• If this reaches critical mass, it ends surveillance capitalism and digital feudalism. I don't want to live in Black Mirror, and this seems like the way out of that future.
• I would really love it if we can establish a funding stream for Tildes. I know I can donate to Tildes directly, but it would be a great test run to help PrizeForge get operational and build credibility. I only need one other crazy person. Isn't the internet great? (My credit card has not been stolen btw)
• The password login is still in development, so you have to login via Google SSO. I absolutely hate using Google SSO but I get it from a developer perspective. Proper auth is hard and companies like Tailscale took the same path and still don't support password login. (My google hasn't been hacked either fwiw)

Hello Tildes!

There's an open-source app I would like to work on and contribute code to, but it uses a toolchain that I'm not terribly familiar with (Deno), and I'm not a huge fan of letting tools like this have full access to my system and files.

Do any of you use a system to containerize different development environments for software development? I could definitely use a standard Docker/Podman container to run the app, but I'm not aware of a good system where you can edit a program's source in an IDE, make changes, build the app, open a local port, and save your new code, all within a sandboxed environment.

If anyone uses a system like this or something related, I would love to hear about it and share ideas.

First of all, I want to say very big THANK YOU for all who contribute to various libre, open source etc. projects. I'm so happy that people love sharing knowledge, skills and fruits of their work.

But to the topic - how do you find time for it?
Whenever I update my Debian or Axpos or any other libre software I see soooo many updates/changes made by (probably soooo many) people. And I always ask myself a question - when did they do that? Where have they found time for contributing? For me full time work makes me so tired that it's the last thing I think about after work hours. Especially in the office job, after x hours of sitting before my monitor I truly hate every next minute after work. I would love to contribute some code, I would realllly love to. Sometimes I find some bugs and try to report them and that's all I am able to do. What frustrates me the most is that I have abilities to code because it's my daily job, but I don't have energy to do that.

So, could you tell me how do you find time and energy to contribute to libre projects?