https://bugs.freedesktop.org/show_bug.cgi?id=109382

Bug ID: 109382 Summary: RX Vega M GL performance and stuttering issues Product: Mesa Version: 18.3 Hardware: x86-64 (AMD64) OS: Linux (All) Status: NEW Severity: major Priority: medium Component: Drivers/Gallium/radeonsi Assignee: dri-devel@lists.freedesktop.org Reporter: princetonf@optonline.net QA Contact: dri-devel@lists.freedesktop.org

OpenGL renderer string: AMD VEGAM (DRM 3.27.0, 4.20.3-arch1-1-ARCH, LLVM 7.0.0) Dell XPS 9575

AMD's discrete GPU on the Kaby Lake architecture performs significantly worse under Linux than under Windows. Below are some rudimentary data I've collected:

Game Linux Windows TF2 30-50 FPS 60-100 FPS Borderlands 2 30-43 FPS 42-52 FPS Minecraft 60+ FPS 40-50 FPS CSGO 40-55 FPS 60+ FPS

Notably, Minecraft is the exception, performing much better under Linux for some reason.

All of the Source engine games (CSGO, TF2) I tested also had a very severe stutter, which would happen every other second.