> Right now I upgraded my GPU to 9070XT - I'm still not sure if that would work on Linux yet because of driver support delay

You can install AMDs driver from their repo directly, it works just fine (using it every day).

> I still cannot use my LG C4 as a monitor in full capacity because AMD on Linux does not support HDMI 2.1

That will never be possible. To prevent pirates from breaking it (lol), HDMI has decided to keep HDMI 2.1 secret. No open source version of HDMI 2.1 can exist.

That said, AMD's driver repo includes both the open source drivers and some proprietary versions of the driver, maybe that'll work for you.

Another option would be using a displayport output and a DP to HDMI converter, as e.g. Intel is using for their GPUs.

- Fractional scaling: That's because X11 itself does not support it. Many older Windows apps also have problems with fractional scaling.

- HDMI 2.1: The HDMI Forum blocked it, as they don't want the details of HDMI 2.1 publically available. If you can, use DisplayPort, which is an actual open standard, and is better anyway. Nvidia works because they implemented it in closed-source firmware instead. https://www.phoronix.com/news/HDMI-2.1-OSS-Rejected

> That's because X11 itself does not support it.

Strangely enough Plasma was able to handle this regardless (guess it was misreporting the resolution to X11 app or something like that to make it work ?) it was a Gnome/Wayland thing.

DisplayPort isn't an option - the TV only has HDMI in and converters suck (they crash constantly, even the expensive ones)

You can also buy active DP to HDMI 2.1 adapters now - if you already have an HDMI KVM for instance. Cable Matters makes one.

If you're happy to dip your toes into another DAW, Reaper has excellent first-class Linux support, works with all your plugins, and has a 60 day trial* for you to get used to it.

* The free trial is enforced as heavily as WinRAR's, and it's pretty cheap (~$60) to buy a licence if the nag screen makes you feel bad enough

I tried that first but had trouble getting it to launch so I decided might as well goo with the OSS option. Boy was I in for a fun ride with getting the whole jackd and audio subsystems running.

Alternatively Bitwig has Linux support and wouldn't be such a big jump.

The problem is not only the DAW support, but the support of low-latency audio interfaces in Linux. Audio interface makers rarely create a Linux driver, and a low-latency setup on Linux is its own hell, with real-time kernel patches. On MacOS and Windows, it works out of the box.

rt patches are upstream since about a year ago. You might need to swap to rt Kconfig, sure, but not patches.

> When I switched to KDE/Plasma 5 to get fractional scaling it was extremely unstable

KDE Plasma 6 made major improvements and has excellent fractional scaling, the best I've seen in a Linux desktop environment and comparable to scaling in Windows 10-11. I encourage you to give it a try.

Sorry I misspoke - I was using Plasma 6, as that was the only way to get fractional scaling in X11 apps

you can use Carla in linux to run windows VSTs, i do it all the time. Works great. Midi and audio routing is also quite good. Ableton also runs with Wine.