HEIC (dynamic) Wallpaper Corruption in Catalina

[timcharper]

In Mac OS Catalina I'm seeing this strange corruption for some of the HEIC desktop wallpapers, as seen in the attached screenshots. All of the JPEG screenshots work, but HEIC stills and dynamic wallpapers sometimes fail.

If I load the HEIC files in Preview (/System/Library/Desktop Pictures), they display perfectly. And, wow, those files are monsters (273MB for Mojave!!! Y U PUT THIS IN /s/l apple !?!?)

It's unclear if this is an issue with Catalina RX 5700 XT drivers, lack of iGPU, or... something else? When I was on 10.15.0 and using iGPU only I did not see this.

Posting this to see if anyone else has

My build is Catalina 10.15.1 beta 2, Radeon RX 5700 XT, iGPU disabled, z390 Auros master. Kexts and plist config included in the attached redacted EFI zip file

 

[itwas]

should be IGPU issue, enable the IGPU
IGPU provide hardware acccleration for HEIF and HEVC format

 

[timcharper]

Ok, I was afraid of that. My IGPU is disabled because it was causing runtime memory allocation boot flaws and I couldn’t get an Aptio fix driver of slide value to work... I’ll probably have to roll my sleeves up and work through the EFI shell to find a combination that works

 

[Blurn]

Hey Tim, did you ever get this working the way you wanted? I just finished a build with a 5700XT in it and also have the dynamic wallpaper issue. I am planning on enabling the iGPU when I get home from work today.

 

[Blurn]

Hey Tim, did you ever get this working the way you wanted? I just finished a build with a 5700XT in it and also have the dynamic wallpaper issue. I am planning on enabling the iGPU when I get home from work today.

Just an update. I was able to get my iGPU enabled and the framebuffer is loaded but the corruption is still there. I'm pretty sure I did this correctly because Sidecar didn't work before I enabled the iGPU. After enabling, Sidecar works without any issues.

 

[canyondust]

Ok, I was afraid of that. My IGPU is disabled because it was causing runtime memory allocation boot flaws and I couldn’t get an Aptio fix driver of slide value to work... I’ll probably have to roll my sleeves up and work through the EFI shell to find a combination that works

This might interest you. (How to determine slide values)

Fixing KASLR slide values - Opencore Vanilla Desktop Guide

khronokernel-2.gitbook.io