Radeon Video

Kernel Modesetting (KMS)

To enable KMS at boot:

1. Add the radeon or amdgpu and fbcon modules to /etc/modules:

   $ echo radeon >> /etc/modules
   $ echo fbcon >> /etc/modules

   or

   $ echo amdgpu >> /etc/modules
   $ echo fbcon >> /etc/modules

2. Install mkinitfs:

   apk add mkinitfs

3. Enable the kms feature in the mkinitfs configuration by adding it to the features variable, e.g.,

   Contents of /etc/mkinitfs/mkinitfs.conf

   features="keymap cryptsetup kms ata base ide scsi usb virtio ext4"
4. Run mkinitfs.
5. Reboot to test the configuration.

Wayland

Install the following packages as needed:

• mesa-dri-gallium: necessary Mesa drivers.
• mesa-va-gallium: VA-API drivers, for hardware accelerated video encoding and decoding

If driver auto-selection does not work, e.g. no mouse cursor under Sway, manual driver selection might be needed:

• export MESA_LOADER_DRIVER_OVERRIDE=r300: for AMD's Radeon R300, R400, and R500 GPUs.
• export MESA_LOADER_DRIVER_OVERRIDE=r600: for AMD's Radeon R600 GPUs up to Northern Islands. Officially supported by AMD.
• export MESA_LOADER_DRIVER_OVERRIDE=radeonsi: for AMD's Southern Island GPUs and later. Officially supported by AMD.

For VA-API:

• export LIBVA_DRIVER_NAME=r600
• export LIBVA_DRIVER_NAME=radeonsi

Xorg

Install either the Free Software driver xf86-video-ati or the proprietary amdgpu firmware linux-firmware-amdgpu.

modprobe fbcon might be needed to avoid black screen when leaving Xorg.