I have a little question that isn't a really problem, but affects in someway when i want to watch some movie on my hdmi tv from my laptop.
So, what i ask you is since i've erased pulseaudio and have installed alsamixer, because this is the only way to stablished a properly sound connection in skype, i've lost the sound of my hdmi connection. The image works fine, but the sound have gone away...
there is some way to fix this? There is a Alsamixer HDMI plugin that fixes this issue?
I have a Acer Aspire 5542G, with AMD64 bits Turion (2,2ghz, 1Mb L2 cache), ATI Mobility Radeon HD 4570.
Oh, i have Ubuntu 11.04 Natty! Everything else works fine!! :D
pactl set-card-profile 0 output:hdmi-surround
Try looking in sound preferences (click the volume applet and select Sound Settings). From there, look in the output tab and make sure HDMI is selected. If that doesn't work, try looking in the hardware tab, which should contain a dropdown, where you should see HDMI. Select that and it should work
To expand @Thuener's answer, and the line
pactl is the PulseAudio Server Control. The set-card-profile chooses a sound card, and if you have only one, the numeric index of your sound card is 0. The last parameter output:hdmi-surround is self explanatory: "Set the sound cards output to hdmi-surround".
PulseAudio Server Control
I have ubuntu installed on a Acer aspire revo 3700 intel atom processor with nvidia ion graphics this is plugged into a celcus 32 inch TV via HDMI (1080p).
The video driver shows as an nvidia which I can select.
I have set the sound to play via HDMI and the output to HDMI but get no sound.
I have tried a sony 1080i TV with the box but get eratic results with the graphics, but the sound picks up straight away that is there is no need to select it.
The graphics on the celcus TV work but I get a dialog box showing loads of different resolutions and frequencies which I have to close manually, these appear to be attempts to set different resolutions for the TV.
Am I missing some sort of screen/sound driver, if so does anyone know what might support the celcus 32 inch (1080p) tv?
You do not need tv-specific drivers like drivers for monitor. You need driver for video card.
apt-get install nvidia-current-updates
You should make sure you sound on your computer is muted, while the HDMI Output is un-muted. Just open up the sound settings, mute internal sound, and make sure HDMI is set to output (and not muted).