[effe]

When you put headphone jack in an hissing sound starts from speakers, if you remove headphone the noise stops immediately. The sound in headphone is perfect.
I'm on a dual boot machine (9.04 and 9.10), with jaunty with kernel 2.6.28 sound is perfect with no issues. The audio settings are the same on both OS. I suppose is a pulseaudio/kernel settings related problem (Karmic uses 2.6.31-14 kernel) but can't be sure.
Tested it with mics muted and all audio set to zero. No luck.

Could someone confirm this issue on Mini9 before I start a bug on launchpad?

Thanks.

[reflex]

Yep. Playing audio over the headphone jack in Rhythmbox starts the onboard speakers hissing. If I stop the audio, the hissing persists for a few seconds, then stops.

[leeosenton]

I hear a faint hiss only during and after playing a MP3 track. I tested with both MPlayer and RythmBox. The hiss stops after unplugging the headphones and closing the playback application. I am running Ubuntu Desktop i386 v9.10 from a clean install. With that said, my problem is minimal at best (but I spent 20 years in F-14 Tomcats so I don't have the best hearing.

Lee