2011/5/30 Ruben Van Boxem vanboxem.ruben@gmail.com:
2011/5/29 Ruben Van Boxem vanboxem.ruben@gmail.com:
Hi,
I have been trying to get my Dell XPS 13 to output 5.1 sound through the stereo jacks (because the NVIDIA HDMI only does 2.1). Attached is alsa-info output. I can't seem to be able to set the Line/Mic In to output.
I have tried several things, going from fiddling with Kmix to fiddling with the modprobe "model=" parameter, and even looking through the hda_analyzer.py output. This last one lifted a tiny corner of the solution, but I don't think a vanilla Alsa install will get me through this.
In Windows, I can use the three jacks to output 2 channels each, so I am sure the hardware is capable of it. In HDA analyzer I can see that there are several "Line Out" entries, but since they all have the node cap "Unsolicited Capabilities", I'm pretty sure the problem is alsa not knowing about the, well, capabilities.
I searched the web and documentation for anything sane to try, but nothing worked. The default modprobe "model=" is the best (I can get 4.0 output from the jacks, and everything works, except the third jack).
If you need more input or information, please ask, I'm very willing to get this solved!
Thanks,
Ruben
I have been able to produce output from the third jack fiddling with hda_analyzer. The diff is attached. I'm sure it is far from optimal, but at least shows which pin needs modification. Plugging into the jack won't mute the speakers, but I guess it needs the same settings as the first two jacks (which do mute the speaker). With this modification, I get the same output from the right jack as from the left jack (meaning the front left and front right channels of a 5.1 setup).
I would dare to suggest a new "model" modprobe parameter, but that's even more above my head. I will be sure to test any changes or suggestions, and keep at it, but I hope someone will jump in and nudge me into the right direction.
Thanks!
Ruben
I will take this occasion to point to the bug report on this issue, which has been around for a while.
https://bugtrack.alsa-project.org/alsa-bug/view.php?id=4546
I think the second anniversary is a nice time to help us poor users get this annoying issue fixed.
Thanks!
Ruben