Hi, quick update: it's definitely a kernel bug, headphone works with kernel 2.6.26.6-79. I filed it as bug #472317: <a href="https://bugzilla.redhat.com/show_bug.cgi?id=472317">https://bugzilla.redhat.com/show_bug.cgi?id=472317</a> Regards, Andre <div class="gmail_quote">On Wed, Nov 19, 2008 at 12:26, Andre Costa <<a href="mailto:blueser@gmail.com">blueser@gmail.com</a>> wrote: <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> Hi Colin,<div class="Ih2E3d"> <div class="gmail_quote">On Wed, Nov 19, 2008 at 11:16, Colin Guthrie <<a href="mailto:gmane@colin.guthr.ie" target="_blank">gmane@colin.guthr.ie</a>> wrote: <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> <div>Andre Costa wrote: > Any help will be appreciated. Let me know what kind of additional info I > should provide. </div>It's unlikely that any of the controls in pulse itself will help as it only exposes a very minimal subset of lower level alsa controls. Chances are the problem is at the alsa level, more than likely a control toggle or an independent headphone volume slider that is set to zero or something. To access alsa configuration, you will need to run the alsa mixer on the hardware directly rather than on the "default" alsa device which is probably setup to direct things to pulse (and thus will only expose afore mentioned minimal controls). To do this in a console you can run: alsamixer -c 0 Or you can use a GUI alsa mixer like gnome-alsamixer which will only look at hardware devices. HTHs and you find a solution fiddling about with a control there. </blockquote></div> </div>Thks for the tip, alsamixer -c 0 indeed shows all the options. "Headphone" is there, and even though it doesn't have volume levels to play with, it is unmuted and should be playing allright AFAIK. However, I guessed you pointed me the right direction: ALSA. Searching on Google I found this: <a href="http://lkml.org/lkml/2008/2/11/412" target="_blank">http://lkml.org/lkml/2008/2/11/412</a> The symptoms seem to be exactly the same. This thread took place on Feb/2008, but I could be experiencing a regression bug, maybe... This also seemed promising: <a href="http://www.mail-archive.com/alsa-user@lists.sourceforge.net/msg23600.html" target="_blank">http://www.mail-archive.com/alsa-user@lists.sourceforge.net/msg23600.html</a> But increasing number of channels to 6 didn't help... More info on the model of my card: 00:1b.0 Audio device: Intel Corporation 82801I (ICH9 Family) HD Audio Controller (rev 02) (couldn't find any specific option for it on <a href="http://fedoraproject.org/wiki/KernelHdaDriverOptions" target="_blank">http://fedoraproject.org/wiki/KernelHdaDriverOptions</a> -- ALC888 isn't even mentioned yet) Any more ideas? I guess I'll try ALSA forums anyway and, depending on the result, file a bug report on Fedora Bugzilla... Thks a lot, Andre </blockquote></div>