This is what I came looking for.
I was on 3.05 until last night.
Specifically while gaming in Arc Raiders I occasionally saw frames drop and become inconsistent. It may or may not recover on its own over the course of a few minutes.
(~90-110fps ~12ms frame times, drop to ~45fps ~28ms frame times)
After monitoring all my thermal sensors etc. Seeing no issues, I decided to check for updates because I know I hadn’t looked at updates since maybe a month after first receiving my FW16 with the same loadout CPU/dGPU loadout as you.
On 4.03, my frames seemed to stay higher and more stable for a period, then it hit, dropped to 12fps, I forget what the frametime reports were.
A laggy stuttery mess, I extract from my mission, and recovery occurs at some point on the way to extract.
Repeat tests, similar, unpredictable time to issue, unpredictable time to recovery, but recovery for sure.
Okay, check dmesg.
Dmesg shows some wine UMIP issues.
Disable UMIP, stable fast frames ~120fps for longer, but then when slowdown hit, it was catastrophic. >2000ms frame times.
Pop open some additional monitoring, sure enough, regardless of power/performance profiles and settings, all cores dropping to 514Mhz.
After that, I closed out the game, hit it with s-tui for cpu stress, and furmark from flatpak for gpu stress. Within 5 minutes, same throttling, okay, so not Wine/Proton related.
Continued testing with s-tui off, and furmark on its own could still cause the CPU frequency drop, and I could see furmark stutter and drop to ~5fps from ~35
