Enable DRI3 For AMD Radeon's Xorg Drivers.

On 17th of March, DRI3 support was added to xf86-video-ati. However, to enable DRI3, you have to edit xorg.conf in order to enable it.
Commit link : https://cgit.freedesktop.org/xorg/dr.../?id=64e1e4dbdd3caee6f5d8f6b6c094b4533fa94953

1) Create a file /etc/X11/xorg.conf.d/20-radeon.conf (Name of the file doesn't really matter, just make sure it sends with .conf) and add the following lines :

Section "Device"
   Identifier  "Radeon"
   Driver      "radeon"
   Option      "DRI3"
EndSection

Save the file, and reboot the system.

2) Now, check whether DRI3 is enabled or not by looking at Xorg.0.log file located at /var/log.
Here's how mine looks like after enabling DRI3 :


Or simply check as :
Posted in: #Coffee Room

Great, thanks, that worked on Ubuntu too - there wasn't the directory though, but upon creation everything works.

There's one thing that bothers me, though - below the «DRI3 enabled» I also see the line:

(II) GLX: Initialized DRI2 GL provider for screen 0

Is that bad?

Hi-Angel

Great, thanks, that worked on Ubuntu too - there wasn't the directory though, but upon creation everything works.

There's one thing that bothers me, though - below the «DRI3 enabled» I also see the line:

(II) GLX: Initialized DRI2 GL provider for screen 0

Is that bad?

Nope, you're good. 👍