Radeon Video: Difference between revisions

Revision as of 23:56, 6 January 2023

To enable KMS at boot:

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
Install mkinitfs:
apk add mkinitfs
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"
Run mkinitfs.
Reboot to test the configuration.

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:

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.

@@ Line 1: / Line 1: @@
+== Kernel Modesetting (KMS) ==
+To enable [[KMS]] at boot:
+# Add the <code>radeon</code> or <code>amdgpu</code> and <code>fbcon</code> modules to {{Path|/etc/modules}}: {{Cmd|$ echo radeon >> /etc/modules<br />$ echo fbcon >> /etc/modules}} or {{Cmd|$ echo amdgpu >> /etc/modules<br />$ echo fbcon >> /etc/modules}}
+# Install <code>mkinitfs</code>: {{Cmd|apk add mkinitfs}}
+# Enable the <code>kms</code> feature in the <code>mkinitfs</code> configuration by adding it to the <var>features</var> variable, e.g., {{cat|/etc/mkinitfs/mkinitfs.conf|features{{=}}"keymap cryptsetup kms ata base ide scsi usb virtio ext4"}}
+# Run <code>mkinitfs</code>.
+# Reboot to test the configuration.
 == Wayland ==