Diagonal-line glitching on 2D textures in X-Plane 12

[HippoProgrammer]

This is a very strange issue, which I've been trying to fix for a while now. My hardware and software combination is quite unusual, so I would appreciate any assistance that can be given.

To preface this, my specs:

CPU: AMD Ryzen 5 8600G

RAM: 2x16GB Corsair Vengeance DDR5-6000

GPU: Intel Arc B580

OS: CachyOS (Arch-based), latest version

Drivers: xe driver, with mesa and linux-firmware-intel installed

My PC is running Arch, which is not Ubuntu, the main distro supported by Intel themselves, so I'm using the latest xe driver for arch instead. I have already tried the i915 driver, and my issue has not been resolved.

When playing X-Plane 12 (latest version, and latest beta) there are strange diagonal lines that appear on all 2D textures. It's difficult to describe, so I've attached some screenshots:

The two top screenshots depict this issue in the menus, where you see very regular diagonal glitches. The bottom two show this error in-game, where the glitches are more erratic and move and flicker - potentially because the in-game textures are changing and moving.

I don't see this issue in any other games, whether Vulkan (like XP12) or OpenGL. Changing graphics settings doesn't appear to help.

I'm really at a loose end here. Any support would be very helpful at this point.

[HippoProgrammer]

Noting also that I have both asked for help in the X-Plane Community Discord, where they were unable to resolve the issue, and submitted this as a bug report to Laminar Research, the creators of the game, but they have not got back to me yet, and I doubt they will for quite a while yet.

[JohnM_Intel]

Hello HippoProgrammer,

Thank you for raising this concern with us. Upon reviewing the image you provided, I can clearly see the diagonal lines you mentioned.

To further investigate, could you please share the following details:

• Have you tried running the game on Windows OS?
• What is the exact driver version installed?
• Does the issue only occur in X-Plane 12?
• Where did you download the game from? 

To further assist you, I kindly request that you download and execute the Intel System Support Utility (SSU) in order to provide me with a complete system specification, which will enable me to assist you in reviewing your system information.

• Intel® System Support Utility for Windows*

When the download is complete, launch SSU.exe.

1. Scan: Check the box Everything.

2. Click Scan.

3. Review: When finished scanning, click Next.

4. Click Save.

Regards,

John M.

Intel Customer Support Technician

[HippoProgrammer]

To answer your questions:

1. Yes - I used to use Windows 11, and there the game was running flawlessly without these diagonal glitches. I was always using the latest WHQL certified Intel Arc drivers.

2. I am unsure at this moment as I am not at my PC. I can get you the precise version number later if needs be, but it will be the latest version of the 'xe' driver provided in the mainline Linux kernel (version 7.0.3-1).

3. Correct.

4. Steam.

As per your request to download your Support Utility, I am unable to natively run the SSU as it is a Windows executable. Could you please confirm whether it is OK to run this tool through Wine or a similar compatibility layer, or whether I can manually provide the requisite system information to you?

Thanks,

HippoProgrammer

[HippoProgrammer]

I am now at my PC. 
To answer what driver version I am using - I'm using the xe driver from the Linux kernel, version 7.0.3-1-cachyos.

I have also located the copy of the SSU for Linux instead. I have attached the output of this tool for you below - please let me know if you require any further information.

HippoProgrammer