I have a 780g hdmi mboard also, I think a gigabyte GA-MA78GM-S2H.
I eventually got sound through hdmi by upgrading to alsa 1.0.16. I can't remember if I had to have fglrx loaded. I also don't think it worked for me until I reached the 2.6.25 kernel. Using 126.96.36.199 now.
Catalyst 8.6 and 8.7 not working very well with my mboard. Went back to 8.5.
You have to enable ("m" to unmute) hdmi in alsa
Sound is not always consistent. I can play a mp3 using xine from command line (have the sound option in ~./xine/config :
But if I start song and restart, sound sometimes gets redirected to front headphones.
# device used for mono output
# string, default: default
# device used for stereo output
# string, default: plug:front:default
Can't (yet) get sound via hdmi using gui of mplayer.
It sometimes works from command line if I have ~./mplayer/config as:
This has sometimes worked
alang=eng #Use English audio
#slang=eng #Use English subtitles
I'm also running optical cable to receiver. This is working well.
mplayer -ao alsa:device=hw=1.0 /dev/dvd
In xine, for time being change video to xshm to get past the xv problems. Although for whatever reasons, xv has started to work for me. Maybe due to changes in xorg.conf
# === Video Overlay for the Xv extension ===
Option "VideoOverlay" "off"
Option "TexturedVideo" "on"
# === OpenGL Overlay ===
# Note: When OpenGL Overlay is enabled, Video Overlay
# will be disabled automatically
Option "OpenGLOverlay" "off"
# === Use internal AGP GART support? ===
# If OpenGL acceleration doesn't work, try using "yes" here
# and disable the kernel agpgart driver.
# Option "UseInternalAGPGART" "no"