When using ATI it's a little awkward at times because the initial setup can be a little bit of trouble. The first step is to confirm the driver is working properly, and to do that you need to run this command from xorg:
if this is working it should output something similar to this: (The sample is for an old system, but current systems have similar outputs )
Code:
display: :0.0 screen: 0
OpenGL vendor string: ATI Technologies Inc.
OpenGL renderer string: Radeon X1600 Series
OpenGL version string: 2.1.7415 Release
This should be enough to confirm that the system has OpenGL Information, however if you want to verify more in depth, use the command "glxinfo"
Now the next step is easy enough... Configure everything to use OpenGL for rendering ( this should provide performance boosts).
However, the only other suggestion is to look into installing the xvba driver for vaapi.
Poor MythTV (XVideo, OpenGL) performance with E-350 Zacate / Radeon HD 6310
However i have recently build a HTPC with a Asus E35M1-M PRO mainboard featuring a AMD E-350 APU (1,6 GHz dual core CPU and Radeon HD 6310 graphics card. Having heard that the catalyst driver has catched up to nvidia in recent days, i thougt i'd give AMD a try.
). This is the case for XVideo and OpenGL. XVmC doesn't work and VDPAU obviously does neither. The cpu load is at roughly 70-80% on both cores (< 10% on nvidia even without VDPAU!!!).
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