Thank you so much for directing me to hda_analyzer. I was finally able to reduce the noise drastically. To do this, i tweaked the settings of one of the mixers. Strangely, there were 4 inputs labelled Val[0], Val[1], Val[2] and Val[3]. The first two had sliders in the output section (controlling left and right), but the other ones didn't. Muting Val[2] and Val[3] in the input section fixed the noise! After further exploration, it seems that those two inputs come from another mixer, which itself has tons of inputs. I used codecgraph to try to understand something about this mess. (included as attachement) But I'm a bit confused about what the "faulty" mixer is supposed to do. Apparently it takes speakers as INPUT (WTF?) Would you mind taking a look at the graph? The "faulty" mixer appears to be 0x0b and the one that I tweaked is 0x0c 0x0b appears to ouput to every channel, which makes sense. The weird thing is that every input to 0x0b is muted, and unmuting them makes the noise change, either quieter or noisier, depending on which input I unmute. weird. So where do you think the bug came from?
By the way, your package for hda_analyzer was not available for maverick, I had to manually install it. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/705633 Title: [Realtek ALC889] Horrible Sound distortion -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
