Radeon Video Drivers
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Summary: Open source drivers for AMD video cards.
- Enable Glamor OpenGL 2D acceleration
Radeon Video Drivers
If you have become frustrated by the somewhat poorly maintained
ati-drivers (the closed source video drivers for AMD cards) or if you would rather use open source video drivers, this is the package for you. This page outlines how to install and configure the open source
Check to see if your card is an AMD card
If you do not know if you have an AMD graphics card or not, you can run the following command:
# lspci | grep VGA
If the output produces information that contains something like "01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Pitcairn PRO [Radeon HD 7850]," then you have an AMD graphics card and continue to the next step in the install process. If
lspci does not provide you with something like this, and instead contains Intel or NVIDIA, consult the main Video page for information.
Preparing the kernel
Now that you know you have an AMD graphics card, you can prepare the kernel for
xf86-video-ati. Begin by ensuring that MTRR is enabled, then enable support for AGP graphics cards (only necessary if your card sits in an AGP slot -- not a PCIe one). After enabling AGP (if you needed it), you should enable support for the DRM and modesetting on radeon.:
Processor type and features ---> [*] MTRR (Memory Type Range Register) support Device Drivers ---> Graphics support ---> (If you have an AGP-based graphics card, enable these options) <*> /dev/agpgart (AGP Support) ---> <*> AMD Opteron/Athlon64 on-CPU GART support Direct Rendering Manager ---> <*> Direct Rendering Manager (XFree86 4.1.0 and higher DRI support) ---- <*> ATI Radeon Frame buffer Devices ---> < > ATI Radon display support
If you have a graphics cards with HDMI ports that you wish to use for audio, some additional configuration of the kernel is required:
Device Drivers ---> <*> Sound card support ---> <*> Advanced Linux Sound Architecture ---> HD Audio ---> <*>HD Audio PCI (64) Pre-allocated buffer size for HD-audio drivers <*> Build HDMI/DisplayPort HD-audio codec support [*] Dynamic device file minor numbers (32) Max number of sound cards
Getting the required firmware
Many newer AMD GPU's require that you install firmware for them to function. Install the package
radeon-ucode (Radeon microcode) for this function:
# emerge radeon-ucode
It is also possible to install Radeon microcode via the
linux-firmware package, which contains the Radeon microcode plus a much larger selection of firmware for other types of devices:
# emerge linux-firmware
Notice, that you need to choose either firmware package.
Installing the firmware into the kernel
This section is in need of updates.
Until this section has been fixed, you'll find help at http://wiki.gentoo.org/wiki/Radeon#Firmware
Eliminating screen tearing
With a compositor
Some machines will suffer from screen tearing with the open source
xf86-video-ati driver. It is possible to solve this by running a compositor. Many desktop environments provide their own compositor but if you still have tearing or don't use a desktop environment then screen tearing can be solved by running Compton with an option such as
In order to have this started automatically every time you log in you can append the following:
compton --opengl &
Without a compositor
Screen tearing can be eliminated natively without the need to a compositor but currently this can only be achieved with the git version of xf86-video-ati. There was recently was a commit which, when the appropriate option has been enabled in your xorg configuration, enables tear free video playback natively.
You need to install
x11-drivers/xf86-video-ati-9999 which can be obtained from the x11 overlay.
Then add the tearfree option to the xorg conf file:
Section "Device" Identifier "radeon" Driver "radeon" Option "TearFree" "true" EndSection