I have Dell 9150 and this same problem, static only from the left channel. This has been happening for a long time and is also somewhat intermittent... some songs have more static that others, sometimes the static isn't there at all even on songs 'prone' to the noise. The noise itself is like a very high pitched crackling as if a few samples had the wrong data. It is not a hiss and not regular intervals.
It sounds like maybe the code that copies the data into the sound card ring buffer has some kind of an off-by-one. If it was always copying 1 fewer sample, and the bytes were in right-left channel pairs then every so often the left channel would have a leftover value in it, which would play like static. This could explain why certain songs are more 'staticy' than others. It could also be something like 16-bit samples being written one at a time as int32 instead of int16 for instance... each sample would overwrite the next one, but the next sample would correct this until the ring buffer was full -- the last write would overwrite the first sample to be played. This could explain why some songs are more staticy. Depending on if that first sample was fetched before it was overwritten could explain why it has static sometimes and not other times (a race condition). If any developers are reading this bug, those are what it sounds like... a single sample being changed randomly, that can happen at least several times per second. It could be a sound library problem, but since it happens on only some hardware and both alsa and pulse and only and others it sounds like a driver problem to me. -- Static sound on hda-intel STAC 9221 A1 https://bugs.launchpad.net/bugs/266927 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
