Poor MythTV (XVideo, OpenGL) performance with E-350 Zacate / Radeon HD 6310
I am a long time Linux/Nvidia user and have been enjoying vdpau on my desktop for years :) 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.
I am running a current Arch Linux with MythTV 0.24.1 and the proprietary catalyst driver from AUR. My window manager is fluxbox and i don't use composite 3D-desktop stuff or whatever it's called currently. Catalyst seems to run the way it's supposed to run, direct rendering is working.
Unfortunately even the standard 720x576 MPEG2 DVB-C doesn't run smooth and seems to be lagging behind and loosing frames (plus the ATI standard tearing :rolleyes:). 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!!!).
I am suspecting i am missing some essential "ATI magic" in xorg.conf or with ati-config to get XV to work in a acceptable way. Does anybody have some pointers?