[Linux] Random High CPU Latency

I'm using a Nvidia card on Bazzite, but the game's been running well for me using the default Proton version (compatibility tool box unticked) with the launch arguments as follows:
PROTON_NO_ESYNC=1 %command%

Worth a try perhaps.

@TheSulit#5816: Same! Reliably happens with Ritual, but also noticed it in Deli, Breach, etc... super annoying

@capnhack#4587: Already in my launch options sadly, didnt help.

So I flipped over to Windows (for the first time in ~8mo?), and have zero of these issues but noticed that my CPU was running hotter than reported in Linux. So I ripped out my aging AIO and replaced it with a PhantomSpirit, and while it dropped my CPU temps (yay?) it had no effect and still having the same behaviour.

Also worth noting that once the CPU starts spiking IT DOES NOT GO BACK DOWN, unless you leave the area of the map that had the offending whatever (or leave the map, via portal if the game is responsive or char select if not).

This leads me to think that this is probably a similar issue to the raft of Shader problems everyone else is having, and that there is something seriously hosed in the gfx pipeline.

I know they very rarely if every reply, but if someone from GGG could at least let us know what we can provide to help troubleshoot? Anything? Please?

Hi there
I stumbled into your post, I've been having the same issue, running the game under lutris and proton, but on Fedora.
I have a ryzen 5600 and a 6600 gpu. and been running the game with Vulkan renderer, last league only got one similar issue once, but this league I've been getting it constantly on Ritual (making it unplayable) and sometimes in breach.

It seems that when there is a lot of effects (explosions, flames, particles in gneeral) the game goes nuts and the cpu latency spikes like crazy.

I waited in game with a minion build clearing all the stuff in the screen, but the latency stayed avobe 1700ms even after the monsters got me killed.

So far haven't found any possible fix, but it probably is on the game side and related to AMD combos.

Edit: need to further test, but an option on lutris called "Prefer system libraries" seems to help. Will update if the issue is gone and try to investigate the equivalent on Proton.

Edit: it didn't work, game still lagged like crazy on a breach

I have AMD 5950X + RX9060xt and I had the very same problem this league. But I think I managed to handle it.

I am using launch options as follows:
__GL_SHADER_CACHE_SIZE=100000000000 LD_PRELOAD="" PROTON_NO_FSYNC=1 PROTON_NO_ESYNC=1 %COMMAND% --nologo --waitforpreload
And I have installed proton EM 10.0-30 by using ProtonPlus tool (I am using Bazzite).
So far, all areas where I had 120ms+ CPU lag now is very playable.