protonscr

Street Fighter 6: Repeated "Memory allocation failed, falling back to system memory" with ReBAR enabled, during active gameplay

vkd3dopen
HansKristian-Work/vkd3d-proton#3215 · opened 2026-08-16 by roro001313 · updated 2026-08-28 · 1 comments · github
Rroro001313 2026-08-16 github

System Info

  • GPU: AMD Radeon RX 9060 XT 16GB (RADV, GFX1200/RDNA4)
  • Driver: Mesa 26.1.6-arch3.1
  • OS: CachyOS (Arch-based), kernel 7.1.8-1-cachyos
  • Proton: proton-cachyos-11.0-20260703
  • vkd3d-proton: 3.1.0 (build 565d695093224e3)
  • ReBAR: enabled, BAR matches full VRAM (16GB, confirmed via lspci)

Issue

Repeated vkd3d_allocate_device_memory: Memory allocation failed, falling back to system memory. warnings during active combat in Street Fighter 6, typically 20-70 occurrences per session, always after:

vkd3d_memory_info_upload_hvv_memory_properties: Topology: HVV usage is allowed, using DEVICE_LOCAL | HOST_COHERENT for UPLOAD.

What I've tested (no change in error count/pattern)

  • Kernel: 7.1.8 vs LTS 6.18.42
  • Mesa: 26.1.6 stable vs mesa-git 26.3.0-devel
  • Proton: proton-cachyos vs Proton Experimental
  • Wayland vs X11
  • All graphics settings (texture/shadow/effect quality, render resolution, FGObjectNumber/BHDisplayNumber/AudienceNumber)
  • Shader cache cleared/rebuilt
  • RADV_PERFTEST=sam,nogttspill
  • Gamescope + FSR
  • SMT on/off

Possibly related to #2258.

vkd3d_debug_sf6.log

vkd3d_debug_sf6.log

HHansKristian-Work maintainer 2026-08-28 github

That's expected. It's just exhausted the budget.

Proton versions

Launch options