Radeon

Radeon is the open source graphics driver for AMD/ATI Radeon graphics cards that is often replaced by fglrx due to seemingly poor 3D acceleration. This guide will attempt to fix this, mostly by making use of the new feature-set, namely, DRI3.

Before starting

Check your cards feature-set: https://wiki.freedesktop.org/xorg/RadeonFeature/#index6h2 "Decoder ring for engineering vs marketing names" will tell you what model your card actually is.

What should I expect?

Run: vblank_mode=0 glxgears & sleep 15 ; killall glxgears

280x (gigabyte)

GPU mode	Before	After
r9 280x (gigabyte)	3258.964 FPS	18001.777 FPS } glxgears is a very simple test, but you can use it to test a driver's 3D performance relative to another one. As you can see here, the results speak for themselves and indicate a performance increase of roughly 560%. Requirements & dependencies X.Org Server 1.17 (not absolutely necessary, but recommended for stability) media-libs/mesa (the newest version you can find) `-- x11-libs/libdrm-2.4.65 (>=2.4.58) `-- x11-libs/libpciaccess (>=0.8.0) `-- x11-base/xorg-server `-- x11-libs/glamor (>=0.6) `-- virtual/udev `-- x11-proto/fontsproto `-- x11-proto/randrproto `-- x11-proto/renderproto `-- x11-proto/videoproto `-- x11-proto/xextproto `-- x11-proto/xf86driproto `-- x11-proto/xproto `-- sys-devel/automake (>1.15) `-- sys-devel/autoconf (>=2.69) `-- sys-devel/libtool (>=2.4) `-- sys-devel/m4 `-- x11-misc/util-macros-1.19.0 (>=1.18) `-- media-fonts/font-util (>=1.2.0) `-- virtual/pkgconfig `-- x11-proto/glproto `-- x11-proto/dri2proto `-- x11-proto/xineramaproto Note: apt and yum users need only run 'sudo apt-get build-dep xserver-xorg-video-ati' and 'sudo yum-builddep xorg-x11-drv-ati' respectively, to build the dependencies automagically. Arch users can do this with pkgbuild somehow, and gentoo users need only emerge the actual driver to have all the dependencies. Building # git clone git://anongit.freedesktop.org/xorg/driver/xf86-video-ati # ./autogen.sh --prefix=/opt/xorg # make # sudo make install Afterwards # sudo vim /etc/X11/xorg.conf Section "Files" ModulePath "/opt/xorg/lib/xorg/modules,/usr/lib/xorg/modules" EndSection Make sure you have these as well: Section "Module" Load "dri" # CHECK THE RADEON FEATURE PAGE LISTED AT THE TOP OF THE WIKI TO SEE IF YOUR CARD SUPPORTS IT Load "dbe" # Double buffer extension Load "glx" # OpenGL X protocol interface Load "extmod" # Misc. required extension EndSection Section "DRI" Group "video" Mode 0666 EndSection #sudo vim /etc/X11/xorg.conf.d/20-radeon Section "Device" Identifier "radeonVGA" Driver "radeon" Option "AccelMethod" "Glamor" Option "DRI3" "on" Option "EnablePageFlip" "On" EndSection Feel free to run sudo chattr +i /etc/X11/xorg.conf to keep X from overwriting this (chattr -i will undo this). Example xorg.conf: http://pastebin.com/aE3e21Bn IMPORTANT: Recompiling the driver will become a necessity after each X upgrade. External links For more info (eg: building Mesa and libdrm from source): http://www.x.org/wiki/radeonBuildHowTo/