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#1 2020-09-13 17:34:19

d3f4ult
Member
Registered: 2019-10-08
Posts: 16

Graphical artefacts in steam games on acer aspire 5920g

So i've been playing some games(specifically tabletop simulator and portal 2) and i noticed some shader artifacts(Link)
output of lspci -v:

01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] RV635/M86 [Mobility Radeon HD 3650] (prog-if 00 [VGA controller])
	Subsystem: Acer Incorporated [ALI] Device 0121
	Flags: bus master, fast devsel, latency 0, IRQ 32
	Memory at d0000000 (64-bit, prefetchable) [size=256M]
	Memory at f0200000 (64-bit, non-prefetchable) [size=64K]
	I/O ports at 2000 [size=256]
	Expansion ROM at 000c0000 [virtual] [disabled] [size=128K]
	Capabilities: <access denied>
	Kernel driver in use: radeon
	Kernel modules: radeon

i'm using the xf86-video-ati package as my driver

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#2 2020-09-17 09:31:34

SyndromeDayna
Member
Registered: 2019-07-13
Posts: 32

Re: Graphical artefacts in steam games on acer aspire 5920g

Did you check gpu temperature under load?

grep . /sys/class/hwmon/hwmon*/temp1_input

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#3 2020-09-17 09:49:03

d3f4ult
Member
Registered: 2019-10-08
Posts: 16

Re: Graphical artefacts in steam games on acer aspire 5920g

SyndromeDayna wrote:

Did you check gpu temperature under load?

grep . /sys/class/hwmon/hwmon*/temp1_input

57000 on standby and 72000 under load of portal 2 with everything on lowest except resolution

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#4 2020-09-17 10:27:25

SyndromeDayna
Member
Registered: 2019-07-13
Posts: 32

Re: Graphical artefacts in steam games on acer aspire 5920g

Do you play linux version of Portal 2 or windows version via wine?

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#5 2020-09-17 10:28:12

d3f4ult
Member
Registered: 2019-10-08
Posts: 16

Re: Graphical artefacts in steam games on acer aspire 5920g

SyndromeDayna wrote:

Do you play linux version of Portal 2 or windows version via wine?

linux through steam

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#6 2020-09-17 11:51:10

SyndromeDayna
Member
Registered: 2019-07-13
Posts: 32

Re: Graphical artefacts in steam games on acer aspire 5920g

Mesa may render artifacts if opengl version is set too high.
I suggest you:

  1. Check currently used version:

    glxinfo -B
  2. Downgrade to version 2.1 and test portal:

    MESA_GL_VERSION_OVERRIDE=2.1 MESA_GLSL_VERSION_OVERRIDE=120 steam

Last edited by SyndromeDayna (2020-09-17 11:51:39)

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#7 2020-09-17 11:57:57

d3f4ult
Member
Registered: 2019-10-08
Posts: 16

Re: Graphical artefacts in steam games on acer aspire 5920g

SyndromeDayna wrote:

Mesa may render artifacts if opengl version is set too high.
I suggest you:

  1. Check currently used version:

    glxinfo -B
  2. Downgrade to version 2.1 and test portal:

    MESA_GL_VERSION_OVERRIDE=2.1 MESA_GLSL_VERSION_OVERRIDE=120 steam

Nope still artefacts
opengl related output of glxinfo -B

OpenGL vendor string: X.Org
OpenGL renderer string: AMD RV635 (DRM 2.50.0 / 5.8.8-arch1-1, LLVM 10.0.1)
OpenGL core profile version string: 3.3 (Core Profile) Mesa 20.1.7
OpenGL core profile shading language version string: 3.30
OpenGL core profile context flags: (none)
OpenGL core profile profile mask: core profile

OpenGL version string: 3.0 Mesa 20.1.7
OpenGL shading language version string: 1.30
OpenGL context flags: (none)

OpenGL ES profile version string: OpenGL ES 3.0 Mesa 20.1.7
OpenGL ES profile shading language version string: OpenGL ES GLSL ES 3.00

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#8 2020-09-18 00:28:54

SyndromeDayna
Member
Registered: 2019-07-13
Posts: 32

Re: Graphical artefacts in steam games on acer aspire 5920g

Did you try video memory stress testing?
There is an application for windows called "video memory stress test". It's free and works through wine.

Last edited by SyndromeDayna (2020-09-18 03:00:22)

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#9 2020-09-18 09:18:37

d3f4ult
Member
Registered: 2019-10-08
Posts: 16

Re: Graphical artefacts in steam games on acer aspire 5920g

SyndromeDayna wrote:

Did you try video memory stress testing?
There is an application for windows called "video memory stress test". It's free and works through wine.

I ran a short test with it under wine,0 errors,also i have dualboot with windows so i fired up windows and ran portal 2 on it,no artefacts,and the memory test on windows 0 errors too,i think the problem is with the drivers or settings,the video card is fine

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