Created attachment 84210 [details]
output of  avivotool regs hdmi

Hello,

I'm running gentoo with kernel 3.10.7 in a multiseat (hd5450, hd3650 and intel
hd3000) config in which I use the hd5450 gpu for xbmc with uvd and hdmi
enabled.

for some reason I don't have sound and the screen flickers from time to time.
dmesg and Xorg logs doesn't signal anything special.

I've tried to patch the kernel with Rafal Milecki's "[FIX][PATCH] drm/radeon:
fix WREG32_OR macro setting bits in a register" fix but it still didn't worked.