Hi, I have two displays, one connected through HDMI, and one through DisplayPort. They both accept audio, and both work fine when connected individually. However, when both are connected simultaneously, only one of them (the first to be connected) will have audio output. "aplay -L" lists four devices of the form "hdmi:CARD=NVidia,DEV=0". ELD files look correct and they come and go as expected when displays are toggled on/off using xrandr. But when testing playback using speaker-test, audio will always go to the same output regardless of which device (from "aplay -L" list) is specified. Hotplug also doesn't work - if the device that was being used for audio output is unplugged, there will be no audio at all. Reboot is necessary for the other device to start working. Curiously, when I first started messing around with the DisplayPort display (HDMI one was already connected for a long time), everything was working fine, and audio would go to the correct output by specifying different audio device. Then unfortunately I rebooted (probably with outstanding kernel updates - I don't reboot often), and it stopped working. Also, when I setup the HDMI display long time ago, and it was the only audio-capable display, I had to specify which audio device to use - I couldn't just output to any of them like now. Video card is GTX 680, using proprietary nvidia drivers, version 319.82. I tried several versions with no difference. I also tried nouveau drivers and didn't get any sound. Alsa version is k3.10-2-amd64, distro is Debian. Does anyone have any ideas of what is going on here? Nothing seems wrong, yet it doesn't work. :) Can anyone confirm that this is at least _supposed_ to work? Any recommendations on how to diagnose it further? This may very well be an issue with nvidia drivers, but not knowing how to isolate it (is it possible to bypass alsa and dump pcm stream directly to the card or something?) I am starting inquiry at the top... Thanks in advance. ------------------------------------------------------------------------------ CenturyLink Cloud: The Leader in Enterprise Cloud Services. Learn Why More Businesses Are Choosing CenturyLink Cloud For Critical Workloads, Development Environments & Everything In Between. Get a Quote or Start a Free Trial Today. http://pubads.g.doubleclick.net/gampad/clk?id=119420431&iu=/4140/ostg.clktrk _______________________________________________ Alsa-user mailing list Alsa-user@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-user
