Am 17.12.2012 13:57, schrieb Raymond Yau: > > > > > Hi everybody, > > > > I'm totally stuck with a sound problem I fail to debug on my own. > > Please tell me if my question should be directed to ubuntu or to > this list. > > > > My setup: > > Asus P5Q Motherboard with Realtec ALC1200 soundchip. Stereo speakers > plugged in to the rear output and headphone speaker/mic combo plugged > in to the front jacks. System: Ubuntu 12.10 > > Desired behaviour: Sound is played back on headphones AND rear > speaker. Front mic should "just-work" > > > > > Problem 2: > > This is the biggest problem. > > As soon as I plug in the front mic, Inside gnome-alsamixer the > volume for master, surround,center,lfe start to jump between on and > off. Why is the Front mic jack controlling these values? How can I > debug this behaviour? I just want them to stay the same, if the mic is > plugged in or not. > > Inside the gnome volume settings, the output port starts to jump > between "Analog Output" and "Analog Headphones" > > > > This look like problem in Jack detection of the headphone and Mic Jack > of front audio panel > > alsamixer -c0 > > Does the playback switch change rapidly on and off in alsamixer ? > > Do your computer chassis have a hda front audio panel and you connect > them to the front audio connector of the motherboard according to the > user manual ? > > Does it help if you disabled the automute switch ? > Thanks a lot. Your input helped me to at least work around the problem. My chassis has a HDA and an AC97 connector. The HDA connector was plugged in and correctly configured in BIOS. I now use the AC97 connector (and changed the BIOS settings) and everything is working properly. Regarding your questions: Disabling automute didn't help. And yes, the playback switch toggled rapidly. One thing I didn't test: I mistakenly plugged the rear speaker into the front channel jack (plugging the green connector into a green jack seemed so obvious). I don't know is this is the same channel as the headphone connector on the front panel... In AC97 mode it doesn't matter if I use the front channel jack or the rear channel jack (both at the rear of the computer) to connect my main speakers. Cheers Stefan
