Translations:AMDGPU/123/en
From Gentoo Wiki
Another possible workaround is to set the integrated GPU as the primary GPU. This will not enable Prime Synchronization. However, tearing will be prevented nonetheless through AMD's TearFree. In this case it will be necessary to use the DRI_PRIME=1, VDPAU_DRIVER=radeonsi(for VDPAU) and LIBVA_DRIVER_NAME=radeonsi(for VAAPI) variables on applications that should be rendered on the AMD GPU.