Bug 105942 - Graphical artefacts after update to mesa 18.0.0-2
Summary: Graphical artefacts after update to mesa 18.0.0-2
Alias: None
Product: Mesa
Classification: Unclassified
Component: Drivers/Vulkan/radeon (show other bugs)
Version: 18.0
Hardware: x86-64 (AMD64) Linux (All)
: medium normal
Assignee: mesa-dev
QA Contact: mesa-dev
Depends on:
Reported: 2018-04-08 12:17 UTC by kaspar.tint
Modified: 2018-04-18 19:18 UTC (History)
1 user (show)

See Also:
i915 platform:
i915 features:

graphical artefacts (886.93 KB, image/png)
2018-04-08 12:17 UTC, kaspar.tint

Description kaspar.tint 2018-04-08 12:17:22 UTC
Created attachment 138681 [details]
graphical artefacts

With Vulkan renderer I see strange artefacts in Dota 2. Did not happen with mesa 17.

Have a look at attachment.

System info:

➜  ~ phoronix-test-suite system-info

Phoronix Test Suite v7.6.0
System Information

  PROCESSOR:          Intel Core i5-4570 @ 3.60GHz
    Core Count:       4
    Extensions:       SSE 4.2 + AVX2 + AVX + RDRAND + FSGSBASE
    Cache Size:       6144 KB
    Microcode:        0x24
    Scaling Driver:   intel_pstate powersave

  GRAPHICS:           MSI AMD Radeon RX 470/480/570/580 8192MB
    Display Driver:   modesetting 1.19.1
    Monitor:          BenQ xl2411t
    Screen:           1920x1080

    Memory:           16384MB
    Chipset:          Intel 4th Gen Core DRAM
    Network:          Realtek RTL8111/8168/8411

  DISK:               128GB Samsung SSD 840 + 1000GB Seagate ST1000DM010-2DM1 + 1000GB Seagate ST1000DM003-1CH1
    File-System:      btrfs
    Mount Options:    relatime rw space_cache ssd subvol=/ subvolid=5
    Disk Scheduler:   CFQ

  OPERATING SYSTEM:   Arch rolling
    Kernel:           4.15.15-1-ARCH (x86_64)
    Desktop:          GNOME Shell 3.28.0
    Compiler:         GCC 7.3.1 20180312
Comment 1 Bas Nieuwenhuizen 2018-04-08 12:49:11 UTC
What GPU do you have?

Also how do you get to the screen shown in the artifact screenshot?
Comment 2 kaspar.tint 2018-04-08 18:28:11 UTC
An RX 480. The screen appears after queuing for a game in dota. Once the matchmaking system finds a suitable game for you, such pop-up will appear in the game for you so you can decide to either join or cancel.
Comment 3 Dan Ginsburg 2018-04-09 13:20:51 UTC
Here are repro instructions on how to get to that screen in Dota without having to join a public match:

1. Go to Arcade -> Overthrow
2. Create Custom Lobby
3. Set lobby password
4. Create
5. Click Start Game
Comment 4 Bas Nieuwenhuizen 2018-04-09 14:26:14 UTC
Bisected it to

commit ad11fc3571e025b22d9feed80a7f499665f7a255 (refs/bisect/bad)
Author: Dave Airlie <airlied@redhat.com>
Date:   Thu Jan 11 08:02:52 2018 +1000

    radv: don't emit unneeded vertex state.
    If the number of instances hasn't changed and we've already
    emitted it, don't emit it again.
    If the vertex shader is the same and the first_instance, vertex_offset
    haven't changed don't emit them again.
    This increases the fps in GL_vs_VK -t 1 -m -api vk from around 40
    to around 60 here, it may not impact anything else.
    Dieter also reported smoketest going from 1060->1200 fps.
    Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
    Reviewed-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
    Tested-by: Dieter Nützel <Dieter@nuetzel-hh.de>
    Signed-off-by: Dave Airlie <airlied@redhat.com>

(with LLVM 5)
Comment 6 kaspar.tint 2018-04-10 20:16:52 UTC
Thank you!

I my self probably don't have the know-how to compile & replace your patched mesa with my system's mesa to verify the fix.
Comment 7 Bas Nieuwenhuizen 2018-04-10 21:34:28 UTC
Since you use Arch, it may be worth building/running

Comment 8 kaspar.tint 2018-04-18 19:18:39 UTC
Can confirm that since mesa 18.0.1-1 the issue has been fixed for me.

Thank you for the work!

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