Arch Linux

brbbtwfyi

Member

Registered: 2020-01-03

Posts: 5

Graphics issue with Radeon Vega 3 / Ryzen 3

I recently got hold of an Acer Aspire 5 (a515-43-r19l) which has AMD Ryzen 3 3200U CPU and Vega 3 integrated GPU.

I've followed the installation instructions and managed to get to a console - but ONLY by blacklisting the amdgpu module. If I let this module load then I just get a blank screen.
So with it blacklisted I've been trying to set up a window manager/xorg but when I try to start SDDM the screen just goes blank again.

I would have thought it would all just fall back to vesa but it doesn't seem like that is happening (otherwise it would just work, right?)

# lspci -nnk |grep "VGA\|'Kern'\|3D\|Display" -A2
05:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Picasso [1002:15d8] (rev c4)
Kernel modules: amdgpu

I read the intall pages on AMD GPUs, but the specific instructions are for southern lakes etc and not vega.

Can someone please help guide me on what driver to use / how to use it? I really don't need graphics acceleration or 3D or anything, I just want to use KDE for basic tasks.
I've installed arch loads of times before and never had a problem with graphics, so I'm really lost about what to look for!

Thanks very much.

Lone_Wolf

Member

From: Netherlands, Europe

Registered: 2005-10-04

Posts: 11,911

Re: Graphics issue with Radeon Vega 3 / Ryzen 3

There appears to be an issue with the ryzen 3 3200u and kernel 5.4.7 and later.

https://bbs.archlinux.org/viewtopic.php?id=252148
https://gitlab.freedesktop.org/drm/amd/issues/1013

You could use the lts kernel until this has been solved, https://wiki.archlinux.org/index.php/Kernel .

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Disliking systemd intensely, but not satisfied with alternatives so focusing on taming systemd.

(A works at time B)  && (time C > time B ) ≠  (A works at time C)

brbbtwfyi

Member

Registered: 2020-01-03

Posts: 5

Re: Graphics issue with Radeon Vega 3 / Ryzen 3

thanks Lone_Wolf -

OK I tried the LTS kernel, and it does let me use amdgpu without anything strange happening.
But I still can't start SDDM, same thing is happening there.

This might be a total red herring, but gnome on ubuntu live works absolutely fine and that loads the amd_iommu_v2 module which I don't seem to have anywhere in either arch kernel.

Head_on_a_Stick

Member

From: London

Registered: 2014-02-20

Posts: 7,732

Website

Re: Graphics issue with Radeon Vega 3 / Ryzen 3

3rd generation Ryzen isn't supported by the LTS kernel so you'll have to downgrade the vanilla version to 5.4.6 instead.

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Are you infected with Wetiko?