Comment 23 for bug 1848741

Revision history for this message
Luigi Pezzotta (sunshadow86) wrote : Re: [amdgpu] Ubuntu 19.10 horizontal graphics corruption on AMD Ryzen 2500u (Raven Ridge)

I'm on Manjaro, Huawei Matebook D (Ryzen version), but I had the same problem and I solved it by changing my /etc/default/grub file in the following way:

I changed this line:
GRUB_CMDLINE_LINUX=""
to this:
GRUB_CMDLINE_LINUX="amd_iommu=on iommu=pt"

then I did:
sudo update-grub && sudo reboot

Everything seems to be working fine now.

Solution found here: https://forum.manjaro.org/t/screen-tearing-amd/63505
(which contains a link to this previous thread: https://forum.manjaro.org/t/fix-gigabyte-970-990-amd-motherboards-and-iommu/44642 )