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 ) -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-amdgpu in Ubuntu. https://bugs.launchpad.net/bugs/1848741 Title: [amdgpu] Ubuntu 19.10 horizontal graphics corruption on AMD Ryzen 2500u (Raven Ridge) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1848741/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
