Created attachment 36936 [details] dmesg of kernel-2.6.34.1 Playing dvb-s video under kms is very slow with this card and sometimes even produces black square artefacts in the picture. If i start the computer with radeon.modeset=0 everything is running ok again.
Created attachment 36937 [details] lspci -vv
Created attachment 36938 [details] Xorg.0.log
Please provide more information about what exactly 'Playing dvb-s video' means.
That would be watching tv via kaffeine. After taking a deeper look at dmesg, it looks like i found "my" problem. The Archlinux mkinitcpio script didn't include some needed modules (agpgart for instance), so agpmode was completely disabled. [dmesg] [drm] radeon: power management initialized [drm:radeon_agp_init] *ERROR* Unable to acquire AGP: -19 [drm] Forcing AGP to PCI mode [/dmesg] I then added following modules explicitly to my initramfs -> radeon,agpgart,via_agp,ttm,drm,drm_kms_helper. Result: Still everything _but_ xvideo (kaffeine again) seems to be ok plus agp mode got enabled this time. Now i disabled all radeon needed modules in the initramfs and let kernel autodetection decide itself later what modules to load. Result: Everything is ok, even xvideo(??). Did i forget some important module, which affects radeon xvideo? This is strange somehow. Well, whatever, it turns out, this doesn't seem to be a real bug at all, so i'll close it.
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