I just installed Xubuntu 11.10 Oneiric on my machine, a MSI Wind U100 equipped with the HDA Intel - Realtek ALC1200 system, and I can confirm that volume and input/output control is completely messed up. If it can help, the previous distribution I used was Jolicloud 1.0, based on Ubuntu Jaunty if I remember well, and sound worked fine there (though I might have updated alsa manually at some point for it to work, I don't remember well).
At first I thought the xfce sound controller applet was at fault, but I reproduced the same trouble using alsamixer in command line, so I guess the alsa-drivers are the problem here. Basically, pretty much all manipulations of the Master, Headphone and Speaker channels cause very strange reactions. Problems I noticed include : 1) The Headphone and Speaker channel both control the same audio output. More precisely : - If I have headphones plugged in, no matter what I do to the "speaker" channel, I can only get sound through the headphones. And more importantly, the speaker channel setting sets the volume of the headphone just like the Headphone channel itself ! - If I have no headphones plugged in, the Headphone channel controls the speaker volume. In both cases, both channels control the single channel, but are not synchronised in alsamixer - and the latest one set takes precedence. For example, I can set the Headphone channel to maximum : the sound will go up. Then I set the Speaker channel to a low value : the sound will go down. And finally, if I slightly move the Headphone channel, sound will abruptly go up to the value of that channel, independently of the setting of the other channel. 2) When headphones are plugged, muting the Speaker channel shuts sound down, regardless of the status of Headphone and Master. Unmuting it restores sound. 3) When headphones are plugged, muting the Headphone channel also mutes Master And here I really mean mute : when I mute Headphone, the status of Master in alsamixer goes to mute as well. To get sound back, I need to : - Make sure all three channels are unmuted, AND - Change the volume of the headphone channel (Though apparently, if I unmute master before Headphone, I get sound back immediately without changing the volume...) 4) When no headphones are plugged in, muting either of Headphone and Speaker also mutes Master. Getting sound back requires unmuting all channels and changing the volume of the other channel (ie, if I muted Headphone in the first place, I'll have to change the volume of Speaker) 5) If I mute Master and unmute it afterwards, I don't get sound back. I have to change the volume in both Speaker and Headphone for it to work. Anyway, by this point you'll have understood what I call messed up, and why it's hardly usable whenever I need to use sound. :-/ If you need more specific information on my config, please ask - I'd really like to see this fixed soon. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/827193 Title: Asus M3A78-EM / Realtek ALC1200 - output selection SNAFU To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/827193/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
