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#1 2021-05-01 08:56:24

Registered: 2021-05-01
Posts: 2

OpenGL rendering incomplete surfaces after Arch update April 2021

I am working on a Dell Optiplex 7010 with Intel Core i5 vPro running 64 bit Arch linux. I did a regular -Syyu OS update to version 5.11.9-arch1-1 recently (April 2021) and noticed that anything that uses OpenGL shows incomplete filling of surfaces such that you get multiple 'see through' triangles and rectangles. This picture illustrates the problem:

Here is what i have tried so far:

1. Looking at different software to see if it was an issue with a particular package rather than OpenGL itself. Result: This is not limited to the X-Screen saver or any particular software package - the same corruption occurs in Cura and FreeCAD.
2. As per the Arch Wiki OpenGL page, I tried manually overriding the mesa loader driver using 'export MESA_LOADER_DRIVER_OVERRIDE=<various options here>' but none of the available drivers made a difference to the problem.
3. I checked my graphics card status. Result:

$ sudo lspci -vnn | grep VGA -A 12
 00:02.0 VGA compatible controller [0300]: Intel Corporation Xeon E3-1200 v2/3rd Gen Core processor Graphics Controller [8086:0152] (rev 09) (prog-if 00 [VGA controller])

    DeviceName:  Onboard IGD
    Subsystem: Dell Device [1028:0577]
    Flags: bus master, fast devsel, latency 0, IRQ 30
    Memory at f7800000 (64-bit, non-prefetchable) [size=4M]
    Memory at e0000000 (64-bit, prefetchable) [size=256M]
    I/O ports at f000 [size=64]
    Expansion ROM at 000c0000 [virtual] [disabled] [size=128K]
    Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit-
    Capabilities: [d0] Power Management version 2
    Capabilities: [a4] PCI Advanced Features
    Kernel driver in use: i915
    Kernel modules: i915

4. I checked my OpenGL status. Result:

$ sudo glxinfo | grep OpenGL
OpenGL vendor string: Intel Open Source Technology Center
OpenGL renderer string: Mesa DRI Intel(R) HD Graphics 2500 (IVB GT1)
OpenGL core profile version string: 4.2 (Core Profile) Mesa 20.3.4
OpenGL core profile shading language version string: 4.20
OpenGL core profile context flags: (none)
OpenGL core profile profile mask: core profile
OpenGL core profile extensions:
OpenGL version string: 3.0 Mesa 20.3.4
OpenGL shading language version string: 1.30
OpenGL context flags: (none)
OpenGL extensions:
OpenGL ES profile version string:
OpenGL ES 3.0 Mesa 20.3.4
OpenGL ES profile shading language version string:
OpenGL ES GLSL ES 3.00
OpenGL ES profile extensions:

5.  I also checked the pacman log to see what packages were changed or added in the last -Syyu update. I found the following which I thought might have something to do with the OpenGL graphics rendering (I could post the whole log if anyone requests it, in case i missed something relevant in my selection):

installed box2d (2.4.1-1)
installed gts (
upgraded intel-media-driver (20.4.5-1 -> 21.1.2-1)
upgraded glslang (11.1.0-1 -> 11.2.0-3)
upgraded gegl (0.4.26-1 -> 0.4.28-2)
upgraded gd (2.3.0-1 -> 2.3.2-2)
upgraded mesa (20.3.3-1 -> 20.3.4-3)

So I downgraded the packages that were upgraded (one-by-one, rebooting after each, until all were downgraded) and uninstalled the newly installed packages with pacman -Rsc. Unfortunately none of this fixed the issue.

Everything was working fine before the system update. I can't see an error or anything to fix in the above. Has anyone else had this issue? Any help in troubleshooting appreciated.
[PS. This is my first post on Arch forums so I apologise if my formatting or style is off the norm. Even though I have been using Arch for 3 years, I have always been able to solve issues that have arisen - till now]

Mod Edit - Replaced oversized image with link.
CoC - Pasting pictures and code

Last edited by Slithery (2021-05-01 11:18:07)


#2 2021-05-01 10:44:31

Forum Moderator
Registered: 2012-10-16
Posts: 12,698

Re: OpenGL rendering incomplete surfaces after Arch update April 2021

Have you tried downgrading the kernel yet? Ivybridge is in the lines of GPUs that got hit with a few mitigations, maybe try to boot with the


kernel parameter


#3 2021-05-01 10:48:04

Registered: 2012-09-02
Posts: 740

Re: OpenGL rendering incomplete surfaces after Arch update April 2021

Why are you upgrading to mesa 20.3.x? The latest repo version is 21.0.3.

Maybe you are using a download mirror that is out of sync?


#4 2021-05-01 14:28:30

Registered: 2021-05-01
Posts: 2

Re: OpenGL rendering incomplete surfaces after Arch update April 2021

Thanks to both V1del and Morn - it turned out you were both right but only the i915.mitigations=off fixed the problem.
The mirror I was using was 'stuck' for some reason - when I used a different mirror and did a -Syyu it updated my whole system again, this time with the 21.0.3 mesa. However, the problem persisted.
When I changed the i915 mitigation to 'off' this fixed the problem. Now the OpenGL graphics display normally again. There was no need to downgrade the kernel (thankfully).
Thanks again.


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