https://bugs.freedesktop.org/show_bug.cgi?id=98776
Bug ID: 98776 Summary: [regression] Rendering glitches in Life Is Strange Product: Mesa Version: git Hardware: Other OS: All Status: NEW Severity: normal Priority: medium Component: Drivers/Gallium/radeonsi Assignee: dri-devel@lists.freedesktop.org Reporter: daniel@constexpr.org QA Contact: dri-devel@lists.freedesktop.org
Created attachment 128065 --> https://bugs.freedesktop.org/attachment.cgi?id=128065&action=edit Glitched car windows
The game Life Is Strange has various rendering glitches with current mesa master.
I have recorded an apitrace of the game: http://constexpr.org/tmp/LifeIsStrange-radeonsi.trace.xz (124 MiB)
The trace contains garbage geometry that is not there in the game (probably due to persistent coherent mappings - the game crashes with MESA_EXTENSION_OVERRIDE=-GL_ARB_buffer_storage), but the glitched car windows seen in the screenshot are visible. I've tracked the origin of the glitches to e.g. draw call 4741838.
All of the glitches go away when reverting commit 74e39de "radeonsi: set IF_THRESHOLD to 3" while https://patchwork.freedesktop.org/patch/122101/ does not help, so this is likely related to bug #98761.
GPU: R9 380X (tonga) Kernel: 4.8.7-gentoo Mesa: git-0c85d2f LLVM: r287273