Thinkpad (T510) Display Port to HDMI TV

Question

I'd like to connect my laptop via a displayport2HDMI adapter to a TV. I tried simply connecting everything, but unfortunately that didn't work. I also didn't see any option in nvidia-settings to configure any output via the displayport. Has anybody such a setup working, or the displayport at all?

I'm running Ubuntu 10.10. My machine is a Lenovo Thinkpad T510 with a NVS 3100M graphics card.

Solution 1

Update, it works. I retried connecting my laptop to the TV after verifying everything with a second laptop running Windows 7. This time in nvidia-settings a second monitor appeared and I could extend my desktop to the TV. But sound does not work. There is a HDMI audio device in the mixer, but I can't get sound via the TV (worked in my test with the other laptop, so connection-wise it is OK).

Update: I have a HDMI device in system-settings->multimedia->phonon. And when I click the test button the TV actually plays something which sounds like the test-melody with a lot of noise. Standard application sound is only audible on laptop speakers. Any ideas on how to fix this?

Update2:
Video: Seems the TV has to be set to the input connected to the laptop. Then nvidia-settings detects the external screen and twinview can be configured.
Audio: No full solution yet, but for me following commandline worked to get audio and video via the TV set:

mplayer -ao alsa:noblock:device=hw=1.7 <videoFile>

Had to experiment with the 1.7 argument a little. First 1.3 worked, after suspending the machine and waking up again 1.7 did. (found the command here: http://www.thinkwiki.org/wiki/DisplayPort)

Solution 2

I had to use pavucontrol.

Configuration tab -> High Definition Audio controller -> Profile: Digital Stereo (HDMI) nr 2 Output

I also did this, to switch the audio output:

Playback tab -> "ALSA plug-in [firefox-trunk]: ALSA Playback on -> "High Definition Audio Cogtnroller Digital Stereo (HDMI) nr2)"

IMHO, pavucontrol is a better interface.

Comments

[David Planella]

Sound worked fine for me on a Thinkpad t410. I simply had to open the sound settings dialog, choose the HDMI controller in the Hardware tab and then the right output.