Discussion:
[Bug 104290] Multisampling gives corrupt rendering
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b***@freedesktop.org
2017-12-16 14:38:52 UTC
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https://bugs.freedesktop.org/show_bug.cgi?id=104290

Bug ID: 104290
Summary: Multisampling gives corrupt rendering
Product: Mesa
Version: 17.3
Hardware: Other
OS: All
Status: NEW
Severity: normal
Priority: medium
Component: Drivers/Vulkan/radeon
Assignee: mesa-***@lists.freedesktop.org
Reporter: ***@archlinux.us
QA Contact: mesa-***@lists.freedesktop.org

Created attachment 136218
--> https://bugs.freedesktop.org/attachment.cgi?id=136218&action=edit
Noisy output

Repro:
https://github.com/ARM-software/vulkan-sdk/tree/master/samples/multisampling

Checkout, build (cmake -DPLATFORM=wayland/xcb) and run
./samples/multisampling/multisampling

There is some weird noise in the output when rendering with multisampling shown
in screenshot at certain angles.

GPU: RX470.
I'm not sure which versions are affected, but it affects at least:
Name : vulkan-radeon
Version : 17.3.0-2
Description : Radeon's Vulkan mesa driver

as packaged in Arch.
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b***@freedesktop.org
2017-12-16 14:39:52 UTC
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https://bugs.freedesktop.org/show_bug.cgi?id=104290

--- Comment #1 from ***@archlinux.us ---
./samples/rotating_texture/rotating_texture is basically the exact same thing,
but does not have this issue.
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b***@freedesktop.org
2017-12-29 23:21:38 UTC
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https://bugs.freedesktop.org/show_bug.cgi?id=104290

Bas Nieuwenhuizen <***@basnieuwenhuizen.nl> changed:

What |Removed |Added
----------------------------------------------------------------------------
Resolution|--- |FIXED
Status|NEW |RESOLVED

--- Comment #2 from Bas Nieuwenhuizen <***@basnieuwenhuizen.nl> ---
This should be fixed by

commit cebc9a119d44cb5b2b3bd5e262452e112b75fea2
Author: Bas Nieuwenhuizen <***@basnieuwenhuizen.nl>
Date: Mon Dec 25 14:27:28 2017 +0100

radv: Flush caches before subpass resolve.

Fixes: f4e499ec791 "radv: add initial non-conformant radv vulkan driver"
Reviewed-by: Dave Airlie <***@redhat.com>
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