Disables amd gpu kernel

Question

[5.205584/ [drm:amdgpu_init [amdgpu]] *ERROR* VGACON disables amdgpu kernel modesetting.

Hello I am having this problem on my machine: I3 7100 / Asus H110M-D / RX 460 4GB / 8GB / SSD 480 and HD 1TB.

I want to migrate completely to ubuntu but found this unexpected error, researched before but did not find any post that would definitely help me.

I was able to install the system but it gets the different video drive from mine: llvmpipe (LLVM 8.0, 256 BITS).

In other versions appeared my video card and worked well now the system is slow and brittle video.

score 4 · Answer 1 · edited Dec 31 '19 at 08:51

4

Been dealing with a blank screen right after boot on the same cause for days (different versions of Ubuntu-Kubuntu-LinuxMint-CentOS (both 32 and 64 bits), until I read a post on Reddit and passed this kernel parameter at boot time:

amdgpu.dc=0

My box is an A8-7680 with R7 (Wani), MSI A68HM-E33V2. Worked for me, hope it works for you!

edited Dec 31 '19 at 08:51

damadam

2,833

answered Dec 31 '19 at 03:43

Matute

41
2

Can you give a few more details (like the reddit link for example)? – damadam Dec 31 '19 at 08:51
I started it without amd drivers, they are very slow then I switched to Mint LMDE3 and I'm using it without problems. – Rafael Martins Jan 02 '20 at 22:43
Thanks, now i'm on windows because this vram (rx 460) have a problem with linux kernel, and my motherboard too. – Rafael Martins Dec 22 '21 at 10:47

score 2 · Answer 2 · answered Jan 11 '21 at 13:22

From this thread on reddit:

I'd try booting with "amdgpu.dc=0".

This "dc" means "display core" and is problematic for some hardware setups. It was originally disabled by default, but in newer kernel versions it's enabled by default.

You can find how to try this out at boot and to make that permanent in this answer

Disables amd gpu kernel

2 Answers2

Linked