Arch Linux

idlepork

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From: Georgia

Registered: 2019-10-02

Posts: 10

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[Solved] Kernel v5 Graphics Issues on Huawei Matebook D 14"

I've been using Arch for a few months on the Huawei Matebook D, but I've had to use linux-lts (4.19.80-2) because both DEs I've tested, Cinnamon and KDE Plasma, show lots of pixellation on mainline linux, especially when running something hardware-intensive (like YouTube in the screenshot below). I don't know how to determine where the issue is, but I am fairly certain that it's a hardware issue because I haven't seen this reported by anyone else, and I was able to get Arch running on the mainline kernel without issue on a Dell Latitude 3300. The hardware is a Ryzen 5 2500U w/ integrated Vega 8 graphics, 8GB DDR4 RAM, and a 14" touch screen.

Pixellation Example on linux 5.3.7.arch1-2:

Is/are there some kernel module(s) that come(s) enabled on linux-lts, or is there a config file I need to set up? I'd appreciate any pointers towards how I can troubleshoot this issue because I'm lost on where to start looking past the surface-level issue.

Thanks in advance.

Difference between lsmod on the mainline kernel and lsmod on lts, if it helps:

$ diff new-lsmod.log lts-lsmod.log
11a12,13
> amdkfd
> arc4
22a25
> chash
34d36
< ecc
49d50
< huawei_wmi
63d63
< ledtrig_audio
65d64
< libarc4
72c71
< mc
---
> media
77a77,78
> pcbc
> pcc_cpufreq
96d96
< snd_pci_acp3x
101d100
< sparse_keymap

Edit: Fixed thumbnail
Edit: Included lsmod diagnostics

Edit: I was being too specific in my searches. It turns out that this is an issue with AMDGPU and out-of-date BIOSes, so I'm going to first try that, but setting the kernel parameter iommu=pt should also provide a work-around. Sources: https://gitlab.com/cscs/linux-on-huawei … k-d-14-amdhttps://forum.manjaro.org/t/glitches-on … en-5/97305

Last edited by idlepork (2019-11-02 00:16:12)