My Laptop is a Dell Inspiron M5110, that runs Ubuntu 12.10. When I plug in HDMI to my 39 inch 1080p Television and play a audio file, sound comes out through the laptop speakers. The HDMI video seems to work normally.
My graphics card is a AMD Radeon HD 6620G, integrated on my AMD A8-M3500 APU CPU. I am using the Open-Source graphics drivers. I ran the
aplay -l command and the results are this:
dell1@Dell-Inspiron-M5110-Laptop-Ubuntu:~$ aplay -l **** List of PLAYBACK Hardware Devices **** card 0: Generic [HD-Audio Generic], device 3: HDMI 0 [HDMI 0] Subdevices: 1/1 Subdevice #0: subdevice #0 card 1: Generic_1 [HD-Audio Generic], device 0: STAC92xx Analog [STAC92xx Analog] Subdevices: 1/1 Subdevice #0: subdevice #0 dell1@Dell-Inspiron-M5110-Laptop-Ubuntu:~$
From what was listed above, Ubuntu does not detect a HDMI Audio output, nor is it listed in the Sound Settings.
I also altered the
/etc/default/grub file from this:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash radeon.audio=1"
Once I did that, a HDMI/DisplayPort 1 audio device showed up in Sound Settings, but it didn't work. So I reverted my changes in that file to its default, since it didn't work.
Any help is appreciated.