Bug 98777

Summary:	GPU lockup in Guns of Icarus Online
Product:	Mesa	Reporter:	Daniel Scharrer <daniel>
Component:	Drivers/Gallium/radeonsi	Assignee:	Default DRI bug account <dri-devel>
Status:	RESOLVED FIXED	QA Contact:	Default DRI bug account <dri-devel>
Severity:	normal
Priority:	medium
Version:	git
Hardware:	Other
OS:	All
Whiteboard:
i915 platform:		i915 features:
Attachments:	Glitched ship

Description Daniel Scharrer 2016-11-19 07:18:08 UTC

Guns of Icarus Online consistently locks up my GPU with radeonsi while loading a specific map.

Apitrace reproducing the GPU lockup:
 http://constexpr.org/tmp/GoIO-radeonsi.3.trace.xz (568 MiB)

GPU: R9 380X (tonga)
Kernel: 4.8.7-gentoo
Mesa: git-0c85d2f
LLVM: r287273

Comment 1 Daniel Scharrer 2016-11-19 07:36:20 UTC

Created attachment 128068 [details]
Glitched ship

The trace also contains a screen of a misrendered ship. Not sure if these glitches are a related to the lockup.

Here is another, shorter trace showing rendering glichtes recorded with lower graphics settings and using llvmpipe:
 http://constexpr.org/tmp/GoIO-llvmpipe.trace.xz (188 MiB)

There are no glitches with llvmpipe, but when replaying the trace using radeonsi parts of the terrain in the menu background are misrendered.

While the glitches look somewhat similar to those in bug #98776, they (and the lockup) are not fixed by reverting commit 74e39de.

Comment 2 Daniel Scharrer 2016-11-19 09:16:13 UTC

Reverting LLVM r286766 "AMDGPU: Implement SGPR spilling with scalar stores" (while not reverting anything in Mesa) fixes the glitches and lockup - so this is likely related to bug #98776 and bug #98761 after all.

Comment 3 Daniel Scharrer 2016-12-08 19:26:29 UTC

Everything renders fine and there are not GPU lockups with LLVM r289080 and Mesa git-31f988a9d6.

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