Hey everyone! A few months back I posted about my CLI tool for controlling Elgato 4K X/S capture cards on Linux. Got some great feedback and saw some users mention the tool, along with their own journeys solving the issues we've all been facing. Went deep down the rabbit hole since then. Here's what's new:

New features since v0.1.0:

• --status now works on both 4K X and 4K S — reads back all your current settings (HDR, color range, EDID, audio input, video scaler)
• USB speed switching — --usb-speed 5g/10g to switch between 5Gbps and 10Gbps on the 4K X
• Firmware version reading — --firmware-version works on both devices
• Audio input selection — --audio-input embedded/analog for the 4K S line-in
• Video scaler control — --video-scaler on/off for the 4K S
• Multi-PID detection — automatically detects your device across all 5 USB PIDs (009b/009c/009d for 4K X, 00ae/00af for 4K S)
• AT command framing — proper ITE UB700E protocol for advanced 4K X features
• GitHub Actions release — Linux binary available directly from the releases page, no need to build from source

The reverse engineering rabbit hole:

I decompiled the Windows DLL (EGAVDeviceSupport.dll) and then went further and Ghidra'd the actual 4K S MCU firmware (ARM Cortex-M0). Mapped out the entire HID command dispatch — every setting the device supports, the read-back protocol for status, and a bunch of risky commands I documented but didn't implement (factory reset, watchdog reboot, etc.). Full write-up is in LOW_CONFIDENCE_COMMANDS.md if anyone's curious about the internals.

Still looking for 4K S testers! I gave away my 4K S, so the new status reading and settings were implemented purely from firmware analysis. If you have one and can test --status, that would be hugely helpful — open an issue with what you get back.

GitHub: https://github.com/13bm/elgato4k-linux

Release: https://github.com/13bm/elgato4k-linux/releases/tag/v0.2.0

Fixes #3 and #4 for those tracking issues.

Shoutouts:

• u/Tatsh2DX — Identified the sendATCommand(0x8e) call for USB speed switching in the macOS binary. That discovery was the key to reverse-engineering the full AT command framing.
• u/RadioFreeKerbin — Discovered that the 4K X changes PIDs across USB speed modes, which led to multi-PID detection support and opening Issue #4
• u/konovalov-nk — For their comedic journey of suffering getting 10Gbps working, which motivated the USB speed switching feature
• u/birdayz (Johannes Brüderl) — Submitted the USB_QUIRK_NO_BOS kernel patch that makes 10Gbps mode actually work on Linux

Edit: Needed to credit u/Tatsh2DX

submitted by /u/Professional_Sun1517
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Hi, I'm new to linux and I've been having an issue where anytime I try to fullscreen an older version of minecraft, it takes a few tries to get it but, once I do, if I were to Alt-Tab, the game goes back to windowed. Anyone know how to fix? I'm using linux mint version 22.3

submitted by /u/Its_Original
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so im trying to open minecraft launcher and it just says

"An h expected issue occurred; we are sorry for inconvenienve. Please try restarting your launcher. If that does not resolve the issue, please log a bug report."

(sorry for no attachment, i dk how to on linux yet.)

i've reset the launcher a bunch and then ran it in konsole and it said

"terminate called after throwing an instance of 'std::bad_function_call'"

PLEASE help

submitted by /u/b4s1cr1nge
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I built vm-curator to simplify the desktop VM management stack on Linux and to ease single-gpu-passthrough scripting. vm-curator handles script generation automatically. Select your VM (Windows or Linux,) go to manage, then single-gpu-passthrough, and then type [g] to generate a script that:
- Stops display manager
- Unbinds GPU from host
- Launches VM with GPU passed through
- Reverses everything on shutdown

I'm running daily without issue with my RTX 4090. No libvirt headaches or XML. :)

It's a Rust TUI with vim-style navigation, MIT licensed. Built for desktop gaming, not servers.

Links: vm-curator.org | GitHub: https://github.com/mroboff/vm-curator

submitted by /u/Markyip1
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Or still huge fps losses?

submitted by /u/TheVagrantWarrior
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Hi Guys!

So I got a Case and a cheap powersup. and throw together the parts I upgraded on a different system.

As in the Titel I ended up with a

Ryzen 3500x

Asus Prime a520m-e

16gb 3000mhz ram (2x8)

rtx2060

for now i had to grab the cheapest M.2 ssd so Intenso 128gb sataM2

I have basic linux understanding from back in the days :-P so most i forgot, but the basics.

I could use advice on what distro to pick,maybe Pop!_OS? is totally new to me as gaming on linux is, or just Ubuntu (I had installed ubuntu before)and go from there?

let me tell u what i want to play

1. Tft Team Fight Tactics should be easy right? I guess over the Android app some how?

2. Wot World of Tanks Not so "hungry" also should run easy?

3. WoW World of Warcraft here i start to wonder if it is possibel, on this system on linux.

is this possibel or will i be disappointed in the end?

Thx in advance, and sry for bad english

submitted by /u/Royal_Analyst_3625
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There are still some things I'm very confused about, like how to navigate through Dolphin or how to find the "Windows" hidden files or how to organize my downloads. I haven't touched Bazaar much yet so I'd like recommendations on what to get and where to get started

submitted by /u/_AAAAAAAAAAAAAA
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I'm super new to linux and I'm using Zorin 18. All my other games are working okay, but I cannot for the life of me get Sims to work.

I finally got it to launch after a lot of trial and error. I'm running it through steam using Proton Experimental. Any other version of proton and the game won't launch. It loads the Vulcan shaders and the game starts up to the first loading screen. Then I hear the music slowly die, the screen freezes, I can't move my mouse, and then it crashes the entire computer. It says there was an issue and asks me to log out. I am honestly so lost, and have no idea what to do. I've got a ridiculous amount of money in DLC, which I'd really like to use.

Any ideas?

submitted by /u/Possible_Cockroach15
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Built with C and Bash. It was my first time writing a proper man page like it was 1969 so that was fun. Idk if it supports older CCD chips but the 9900X3D and up all have the same sysfs interface location.(on linux) Right now it simply switches, to a specified CCD via commands gaming and performance, has a toggle cmd, and supports application passthrough launching ie: x3dctl gaming steam to then switch to the CCD with the cache and launch steam or replace that with x3dctl performance blender for a workload example, and status for checking. Future Goals are a simple config system with per-application profile mapping, CCD pinning/process affinity support, and Process Detection. suggestions and ideas are welcome. I'd love some feed back from the community, and if you're not much of a talker at least leave a star ;)

submitted by /u/GrandBIRDLizard
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https://preview.redd.it/ev74y256l4jg1.png?width=834&format=png&auto=webp&s=99753e2b84ba05f9ff96e89f9ec0bbf82803b2e9

i heard i can use and force games to use fsr4. how do i do that?

submitted by /u/Old_Impression_5616
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submitted by /u/Background-Fix-7604
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So I have Foxhole running really nice on Linux Mint for two years straight and now it's almost unplayable because of bugs with the new update. It totally crashes with normal proton settings but if I set it to Proton 8.05 then it runs, but you encounter bugs moving around that make it unplayable. But I know any Gnu-Linux users probably make up less than 1% of Foxhole users, so what do I do to get support for this? I'm not even sure how to report it to the Foxhole developers. Steam only lets me report it to Steam itself. So, where do I actually go?

submitted by /u/otakugrey
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Full game Linux installers are available here: https://github.com/OldUnreal/FullGameInstallers/tree/master/Linux

The installers will automatically install the latest patch available.

submitted by /u/FineWolf
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I bought this FSP Flex ATX PSU for my BC-250 Bazzite build with the idea to use an 8PIN EPS CPU to 8PIN PCIe adapter since it only has EPS, 24PIN and Molex.

Molex was out of discussion because of the 55W per Molex limit. Two Molex would still only be 110W. Not enough for the 220W the BC-250 needs.

8PIN EPS should be able to handle over 300W+ but I can‘t find any adapter that doesnt look like it would burn anytime soon.

What else is my option here?

submitted by /u/Alternative_Table282
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Hi. So my issue is, that whenever I start Steam Big Picture Mode, it starts on my left Monitor, not on the center one. I checked with xrandr and the center one is set as primary. I can switch BP to window mode, move it across, go fullscreen again, but that only lasts for that session.

It is especially annoying when using sunshine moonlight, cause this is streaming from the center monitor (as it should).

I'am on bazzite by the way. With an NVIDIA GPU.

Any tips on what to do?

submitted by /u/RokiGer
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Hello,

I just switched over to CachyOS from Windows today and it's my first time trying to game on Linux. So far, most things have been incredibly easy but I'm stuck on one thing: trying to set up a damage meter for FFXIV. I tried installing ACT through Wine, and that worked but it wasn't actually picking up any data and I read that the overlay would be a problem and since I only have one monitor at the moment I really need the overlay. My searches led me to try INACT instead through XIVLauncher and I was able to get that running with no problems, but now I'm stuck again trying to get an overlay. According to the setup guide from INACT, I need to use HUDkit since I'm on Linux. I have that installed now, but when I try to run it I'm getting the error:

Gdk-Message: 14:05:06.011: Error 71 (Protocol error) dispatching to Wayland display.

...and nothing else happens. I've tried searching in this sub but I'm not finding anything, does anybody know of a straightforward way to get a damage meter running with an overlay in FFXIV on Linux?

submitted by /u/Alberbecois
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After being an Epic Exclusive, the action-adventure Blades of Fire from MercurySteam and 505 Games is arriving on Steam on May 14th.

Read the full article on GamingOnLinux.

GOG has more goodies available for fans of DRM-free gaming with the release of more Total War games, and The Long Dark has returned as well.

Read the full article on GamingOnLinux.

Yo, I’m on a 2.5Gbps line but Steam downloads are painfully slow on Linux. Everything else hits full speed, it's just Steam. For reference i use Cloudflare DNS ipv4 and ipv6, i tried different stuff like disabling http2 as i read here and there.What’s the fix for this? I’m wasting a monster PC here.

Setup: Ryzen 9800X3D + RTX 5070 Ti (Nobara)

submitted by /u/PrisonMike9571
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Why does Dark Souls 3 run at 20-30 FPS on Bazzite but 50-60 FPS on Fedora 43?

2x8 GB RAM (16 GB total) G6900 Dual Core 12th Gen 2 HDDs (1300 GB total) Dedicated AMD RX550 2 GB 1080p HDMI TV/Monitor

submitted by /u/Agitated-Memory5941
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